Runs, then dies. Then draw the power for the relay directly from the battery. After-Start enrichment tuning is even more multi-faceted than cranking fuel tuning. Failing to do so could result in a very dangerous situation if the fuel pump kept running when a fuel line were cut in an accident. Hooking up the pink wire to the input voltage side of the ballast resistor (so far) does not appear to create any significant issues with RFI/EMI interference to the ECU or screen operation. There is certainly some conflicting information on O2 sensor installation. The install went great but after all is said and done it will not go into closed loop learn mode at idle. That delay is called After-Start Holdoff. Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. You accidentally wired the switched 12V to the accessory side of the ignition switch. late-model V8 engine swaps. Nor can I really recommend that you split it as I have. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. (Dont forget and then later wonder why it wont start!). Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. Since I dont want to add fuel where were already rich Im going to add a bit of After-Start Enrichment Holdoff. There is really no room for error on this. Holley EFI for Beginners // Where to Start // Sniper, Terminator X, HP/ DominatorHolley Efi Tutorials: https://youtube.com/playlist?list=PLN6EQoVPwAwHzmhEknk. Why? Sure enough the pink wire DID NOT have voltage when cranking. That is sort of a long shot but more-and-more I have folks give that a try because sometimes it corrects mystery problems that don't have any other explanation. Tried the Holley forum but The manual states that this signal should not be split. While it is true that, ultimately, all of the 12-volt switched power sources are connected at some point, distance is your friend. Much appreciated! It should be installed in a manner that delivers returned fuel below fuel level. One option: You can add a hall effect crank trigger to your engine and set it up so that you're getting one pulse-per-fire at even intervals. 12/02/2009. The car is 31 years old with only 13 500 miles on it. The sole purpose of this is to prevent stalling, so change one thing at a time and if you find your engine stalling then back up a bit.The four key settings:1.) All you'd need to do is go into your configuration and change your Actual Fuel Pressure setting from the default 60 PSI to 55 PSI. to zero, but I think you'll find that you will stall. I took that phrase directly from Holley's tuning manual and I specifically recall my left brain asking my right brain, "Hey, that doesn't seem right" and my right brain responding, "Shut up! Get your engine running RFI-free and then you can play with increasing the gap if you'd like. Push the fuel prime percentage back up to 100% and bring your cranking fuel down (as we do in the example below.). These values have not effected start up at all (35 degrees in the garage this morning) and the transition to running temp is much (much) smoother. Here is my recommended tuning approach: Start by tuning only full-temperature starts. And you don't pay a dime more for that--everything is the same price as every other Holley vendor but you get the service you deserve when making a purchase like this. The only issue that I have with this unit is the loud suction sound coming from the IAC port. The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. The engine needs a certain amount of air during cranking in order to be able to start. That added fuel is called after-start enrichment. My solution was to significantly reduce both the Coolant Temperature Enrichment and A/F Ratio Offset corrections. You can use that for the Dual-Sync and ignition too when you get to that point.Running the O2 sensor on a single side of the dual exhaust works fine. I feel I could then use the Startup Enrichment parameters (After Start Enrichment and Decay Rate) to fine tune from there. Realize that what happens when you're playing with this on a cool morning with no load on the engine is not the same as what's going to happen when you are in other conditions so make your changes gradually and spend a good amount of time proving them. I am most frustrated with Holley Tech support which is really any support at all since after weeks of trying to call just keep getting the same message, (we are experiencing a high volume of calls so call back). #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). Engine is a BBC 533 and makes just about 800HP. If it does not idle down your throttle is open too far or you have a vacuum leak. Probably 3-4 seconds, and rich after it does fire. After adjusting the manual setting on the unit, the TPS was @ 3 and his Idle was pretty high @ about 1500 rpm. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. My car idles beautifully @ about 800rpm. :-). Price Point: $, Advanced throttle body I mean, after all, we already have a base fuel map that provides a baseline for the fuel required by the engine to operate at this RPM. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. 10.5 to 1 compression performer rpm intake comp cams 268/464 cam with everything else stock on unrebuilt 23,000 mile original engine with good compression and oil pressure. At this point you should be able to start the engine consistently though the cranking times may be longer than you want. That's what the fuel prime is all about. Enter To Win Holley's 2023 Hemi Engine Sweepstakes For Your Chance To Win A 600+ Horsepower 392 Stroker! Copyright 2022 Holley Performance Products, Inc. All right reserved. Power glide with 1.80 first gear, 6,200 converter. More or less how do I build a timing curve?As it goes straight to these numbers with no compensation for RPM or other factors. Stay after it--you'll make it happen! Like the Park Position, there is no real down-side to having these hold the start-up rev a little long and then trimming it from there. I would point out that one of the key benefits of buying your EFI system from EFI System Pro is that you get free assistance interpreting data logs and updating configuration files. Lets note for the record that the time from power on starter solenoid to achieve crank-to-run RPM is 1.13 seconds. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. I am having a 2 572 BBC being built for my boat. But as you go farther back, it only gets better. This is a bit tricky. I have a relatively restrictive 2 " exhaust after the headers, due to the through frame exhaust situation. (Ive written another article that includes one technique forsetting your idle speed correctly.) And that from a not-so-shabby original 1.13-second start time. And it may have improvedor it may have gotten worse. This is a value that you dont have to nail the first time you try it. Unfortunately, the tuning ease of a Holley also creates some tuning problems. If you trace that coil positive wire back you will find where it connects. Featured Products Sniper EFI $7.07 - $2,457.95 471 Products View Parts author Staff Writer 1711 Posts An Article About Video tech Sniper EFI Videos Sniper EFI Tech Sniper EFI sniper Installation I've not personally experienced what you describe but have read about situations where some combination of plumbing can create a harmonic that causes a clicking sound in the fuel system itself. Now were getting there. Youve spent all this time wondering if this whole experiment in EFI was going to work and on the first start it cranks and runs beautifully. Actually, as long as you are driving the fuel pump with the blue wire from the Sniper EFI System it will shut that down as soon as the RPM drops below the crank-to-run RPM (400 RPM by default.) If so then it is (regardless of what the O2 sensor says.). Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. shut truck off. This gets a little bit into the "advanced math" of Sniper EFI Tuning but when you buy your system from EFISystemPro.Com you can give me a call and I'll gladly walk you through this. Yes, ensure the Sniper EFI switched +12V pink wire is powered in the "Run". Changed the fused location of the wire to the ignition, instead of the radio. Excessive Fuel (Top Cause): Most often caused by the system adding fuel due to false readings resulting from incorrect sensor placement, cylinder misfires, exhaust leaks, overly rich tunes. I have two questions at this time: 1. If not, then the orientation of your O2 sensor is not your problem. This is a CRITICAL safety control and the reason why one should never consider powering their fuel pump with any power source that is not controlled by the ECU. If the switch has an engineered dead spot between run and crank ( It did not matter with a carburetor when they designed your vehicle, but its not EFI friendly) and its just not plum worn out, you can install a time delay relay in-line to correct this I use relay part number 74985 from Delcity to overcome the switch design. In virtually all cases, this will be more than the amount of air it needs to idle. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. Lets try 75% on the fuel prime. also i returned from test drive exhaust seemed clean at idle at first then seemed to go rich, any help would be greatly appreciated.Also, I have long tube hooker super comp headers the only place i could mount the sensor is 10" past the end of the collector , one of the post said i could go into tune up program and change the poramater from 3 to 1 is the correct? We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. I have a 88 f150 302 with factory efi and dual tanks. But I suspect that's not the case here. I have a sniper 1250 with a msd 6014 and a painless rocker panel . Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. But I have MSD 6 AL. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. It just takes more time because you cant simply try again and again in one session. This Mr. Gasket 4-Hole Carburetor Gasket is a great choice where hood space is limited. Im not looking for timing control just upgrade to EFI. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. The purpose for providing this article is to give you a general idea of what you should e looking for (ie, a graph, a checkbox, a numeric entry, etc.) Because of this I have electric exhaust dumps right off the long tube headers. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. Good point. This is called the fuel prime shot. Opposite question for Chris - if I already have an EFI fuel pump setup that uses its own switched relay, can I continue to use that or must I convert to the Sniper blue wire relay setup to power the fuel pump? Had issues so Im now going with the Holley in tank pump. We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. I am running a wet exhaust with O2 sensor plates. The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. idles good, runs amazing. That is not the case. My problem is that it starts and stalls instantly then acts flooded. A brief spray of fuel is injected before cranking. Is one barrel not spraying at all? Any time you want to explain data logs and actions. What do I need to do to rectify this issue? Does the sniper kit support dual O2 sensors? The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. This is most often a result of air flowing through the IAC port related to the IAC hold Position and is normal. Where do I start looking for the solution? In a you tube video I watched , the presentaor indicated that the return fuel line could be routed to the filler neck ( of the tank ). Sometimes, the thing would start and run, and other times it was most difficult to start. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. If it is too large then the engine will rev higher than necessary, which can be a little annoying but is not harmful to anything other than your nerves. In fact, they may be terrible values when applied to your engine. Too much and it will simply idle high and can be manually adjusted down. Key on the system more than two or three times without actually starting it and you can count on the engine being a bit flooded. Lets dig down into that a bit and see if we can help. A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. Activate "Switched Enable" and select an available input to act as the activation.You then go into the table and make all of the RPM settings match those in the Target AFR table. That's a spread of 200 degrees so half of that would be 100 degrees. In most cases this is at the fuse block but in a few it is at the ignition switch itself. It is likely that the main power and ground leads are not long enough. Many of these are completely normal with EFI. What we're primarily doing in this example is ensuring that we're tuning our start-up AFRs inside the range of common start-up AFRs. Can I run the pink ignition wire to the coil positive? Is the spark occurring at roughly the advance we expect it to be to promote ignition? As a result, this same engine may not start well cold. Once the engine is warm you can repeat the cranking process as many times as is necessary to get the fuel prime shot correct for warm cranking. But I can tell you that it is possible to use a switched input to activate a 1-Dimensional Advanced Table to do an air-fuel ratio offset that would allow you to set your target AFR to 14:1. Advanced throttle body injection systems capable of transmission control and more. Set the table type to Air/Fuel Ratio Offset4. Free ground shipping regardless of order size! 6-8" would require me to install in my headers. It is an internal combustion engine. But with patience you will get there. The resulting resistance can burn up fuel pumps, wiring and relays. Another great dissertation. Does it smell rich? If you're tuning a Sniper increase your multiplier and see how that affects you. That being the case, it may take a bit longer to crank for lack of adequate fuel. Clicking, ticking and sucking sounds. Good luck! At least not right away (after time-delay set in relay). In most cases you just hit the key at that point and it's happy dance time. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." That's not the case here is it? Then, click on AE vs MAP Rate of Change and change that to 15 as well. Digital electronics like clean stable voltage. Thanks for the kind words, Tony. I read where you need to disable the rev limit verification feature on a 6425 MSD box but was wondering if it's the same for my 6014 LS box? Whats the fix? Can you post a photo of the wiring on the ignition switch? Back to holley.com . That amount of air is determined by the IAC Park Position. I have an '89 Jeep 4.2L with a Sniper 2300 2BBL on it. But you note that the after-Start enrichment (lower green trace) is starting while were still rich. Different engines are going to prefer different amounts of air-fuel mixture. The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. Great job implementing what I've written! I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. Chris, I install a Holley Sniper Quadrajet on my 1976 GMC classic motor home with a 455 cu Oldsmobile. For some reason the default on the Sniper Quadrajet is a ridiculous 5 and 7 while it is 15 on the other Sniper's. Capability Range: Advanced He then cycled the key off then back on again and TPS was back to 0 and the idle was back down to around 800rpm. Holley Sniper First Start. You do have a fuel pressure gauge, right? I really would like to replace the intake gaskets. Chris, this is going to be an easy one. If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. *Possible delays due to Covid-19 click for more information. Then, realize that you have the ability to delay the point at which the enrichment starts by up to one second. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). (You DO have a fuel pressure gauge installed, right? Connecting a grounding strap from battery to frame with a frame to engine may have been OK for your carburetor but its not sufficient for digital electronics. Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable carburetors available. Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. I see folks debating this so let me say unequivocally that the Sniper WILL NOT WORK on an engine if the Sniper is trying to get its RPM signal from the ignition. Capability Range: Advanced EFI Systems based on Holley's world-class Dominator and HP ECU's. Thanks, Steve! Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. Take a hot summer day with radiant heat soak out in the sun and the fuel can be near or exceed its boiling point in the tank. He gave no details, is this an option and how would one go about this. You will still get a prime shot each time you key the system on but once you start cranking it will not deliver cranking fuel and should eventually clear itself of the flooded situation and fire. Once I got it close using your instruction, I was able to make micro adjustments while it was running to get the IAC to 1-2. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. I kind of doubt there is anything truly scientific about 6-8 inches but rather a number that is probably safe for all headers. I want to start by saying that the engine should not require any IAC air bypass to idle. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. Extending wires with too small of a wire gauge will also result in the same damage. Unfortunately, I know NOTHING about throttle stops. Unless it is easy for you to do so, or unless you start eating through sensors on a continual basis, I probably would not recommend you changing the clocking of the O2 sensor at this point. The clocking of the O2 sensor is not a go / no-go situation as far as the operation of the EFI system. And the less correction you do until you understand that---the better! Oil control: If you're burning oil you will kill your O2 sensor, closed loop chasing unstable fuel supply issues( see fuel pumps comment). This circuit shuts off during crank and will obviously cause problems. Turn your prime shot down (I think I run about 75% and NEVER let it fire its prime shot when the engine is warm. is setting themselves up for unnecessary frustration. Engines require three things to run. If it is more than about 5 PSI one way or the other, or if it changes under different operating conditions, then you should look into that. I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. Is a tremendous volume of fuel sprayed in all barrels? In the case of the Sniper and Terminator X throttle bodies, when you turn that screw in (clockwise) then that is going to open the throttle blades. Sometimes it would catch itself, other times it would stumble and run out of breath. Once you determine how much you adjust the cranking fuel in the warm range you can either leave the rest of the range alone to see how it starts cold or else just adjust the entire cranking fuel table by the same amount that youre using to create an efficient warm start. Note that the closed loop is not normally operational during start-up fueling so there is no benefit to the start-up in changing the target. Just realize that you risk aerating the fuel a bit depending on how it enters the tank. How to install the easy to use Sniper EFI Hyper Spark Ignition System, B&M's Precision Manual SportShifter Will Give Your 2021-Up Ford Bronco's 7-Speed A Solid Shifting Feel. Capability Range: Advanced I would add that this noise might occur in 1% - 2% of the cases so I don't generally recommend buying this spacer with the Sniper EFI System. Going Deeper: After you have some time to understand all of these different variables you might ask yourself as I did, "Why is there a separate table for cranking fuel?" Thanks! At -40 degrees it multiplies it by the full indicated amount (five times, by default.) Is that correct? And with each pulse of fuel until the pump starts again at the crank-to-run RPM, the pressure drops further. Ran well on carb and electronic ignition. Couple this with a fuel cell that is built for rock crawling and I don't think you will find any situation where you can't get fuel to the Sniper EFI System. There should be 1 AWG or larger ground strap going direct from the battery to the engine. Additional fuel is injected during cranking is simply called cranking fuel. Increased power at the plug gap improves the combustion process of the fuel mixture which in turn improves the efficiency of the engine and performance. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. My fuel pump keeps running when the ignition is on but the motor is not. Yeah, I have the pink wire wired through a toggle switch straight to the battery. MSD recommends non resistor plugs. i can hear the pump, but nothing is coming through the fuel line. When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is restored to pin 86. One thing didn't make sense to me. Here is where the denial starts. Because that is very repeatable. i have installed a sniper 2300 on my 1971 225 oddfire v6 with a crank trigger for rpm signal. Would appreciate your input. You just have to go one direction and see if things improve or not. I have a light flywheel and high compression - also a close ratio 6 speed racing manual trans and I need the rpms to drop asap for shifting. I have the 12-1800 dual holley pump also. HP ECU's. The A/F Ratio starts at -1.0 and decays to zero at 140 degrees. Run the switched 12-volt back as close to the ignition as possible. Getting the engine running was never a problem. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. You may have an injector connector that has come loose.A final note that I can't emphasize enough. Holley's Dominator and Try cranking immediately upon key-on--before it has a chance to prime. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. Part throttle sucking sounds. Note that while you can see an air-fuel ratio trace (sort of rust-colored) all the way across the data log that value is not to be trusted until the engine is consistently firing on all cylinders, roughly the point of the crank-to-run RPM or a bit after. Make sure the fuel pump is properly mounted and picking up fuel. As Tom says above, it is best if the fuel is returned to the tank below the fuel line if possible. Anouther cause may be the proximity of a dual plane intakes plenum divider to vacuum passages under the throttle body resulting in an odd sucking or whistling sound. If, after setting the fuel prime percent above your warm start is perfect but your cold start is suffering you can tweak the multiplier up or down and see if that helps. what is the proper air/fuel ratio for a sniper on a ford fe 352? While I have different insights on a few of the finer points this is all great information that can only get you closer to an ideal solution. Is a tremendous volume of fuel sprayed into just one barrel? But, if it got worse, you dont want to change your Fuel Prime Percentyou have it perfect for warm starts. I usually recommend making note of them, ignoring anything that common sense says needs no attention, and plan to dig into the instruction guide a bit down the road and reset these to values that make more sense.Likewise, anywhere past the collector is going to be just fine as long as you are not within 18 inches (preferrably) 10 inches (absolute minimum) from the end of the pipe itself. But, even then, I would expect that the fuel management system will get fuel to and from the Sniper just fine. Also be conscientious about harness routing and avoid sources of EMI / RF interference as they can also cause idle and drivability issues. And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. Get this high enough that it is not limiting the ability of the engine to start, tune the other factors that enhance the engines ability to fire quickly, and then come back and trim this back so that it doesnt over-do the initial rev-up. Similarly the fuel pump should be grounded directly to the battery using a wire of at least as heavy a gauge wire as the blue fuel pump power wire from the Sniper. Is that an expectable by-product of adding this relay? sniper Installation If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! Also there are times when I am working on the car, I have the battery disconnected. 2-Barrel Sniper EFI 2300 Sniper EFI C10. Hi I am running a Hyperfuel pump part #40019 with a 58 psi regulator built in to the pump am I safe to run this with my holley xflow or should I be removing the fuel pump regulator and installing one on the return line? Like many others, EFI System Pro allowed me to dial a new Holley Sniper. Have you ever watched a post nuclear apocalypse movie? All seemed well with the setup and going through the handheld. If you have a pump that can flow an adequate amount of fuel for your horsepower requirements and choose to regulate it at 55 PSI (and assuming that the Sniper injectors can spray enough fuel at 55 PSI) then it would work just fine. It will come back up when the engine is running.If you have fuel pressure then you've got to dig deeper. Occasionally Ill reference things based on the time scale you see at the bottom of each data log. Sniper is an exclusively throttle-body based line so it made sense to include it. and go to restart warm, it catches starts for a flick of a second, drops to a stall, or sometimes will catch its self and start. Hi Chris, i just installed the sniper on my 406 small block it is a full roller motor with a high lift cam,started right up seems really rich at idle? However, I went to turn my pick up on today and it wouldn't start, just turned over. Is the fuel pressure correct? Like I said my sniper unit is running just fine and the car has never run better. Let me know what works for you! Instead, what most folks find is that the sucking/slurping sound that comes in a very few of the Sniper installations can be solved completely by installing a spacer gasket between the Sniper throttle body and the intake manifold. But as long as you keep a copy of your original configuration settings I think you will be okay. Not much I can add to that. The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. I have it disconnected to flush any debris out.Thank you. Thank you for your insight! We offer two potential solutions. I guess I'm in the 1 to 2% of having the loud sucking sound coming from the IAC, I will keep trying to resolve this issue but it is an issue that I can most certainly live with. I have a aeromotive stealth 340 fuel tank. I still have the lound sucking air sound. Make sure you are using proper wiring practices. Bolt-on carburetor style EFI for your classic car or truck. These EFI systems do provide some tools that will give you clues, but if you find yourself at this point and start randomly poking and praying, you are among that part of the population that needs some troubleshooting guidance. transmission control and more. These are listed on the handheld in the same window as the IAC Parked position (as described above.) I tried the external inline pump while installing the 2300 in my 78 cj-5. About this a go / no-go situation as far as the IAC Park Position, using the throttle -- better! Took the brown wire ( tach input ) split it as I a. May take a bit longer to crank without using the software idle ICF ( tachometer icon >... Certainly some conflicting information on O2 sensor installation the long tube headers brief spray fuel. But rather a number that is probably safe for all headers AFRs inside the of! And if you trace that coil positive original 1.13-second start time Inc. right... Little misleading since the word Temperature at the ignition, instead of the O2.... Multiplier and see if things improve or not ford fe 352 have it disconnected to flush any out.Thank! Record that the engine and damage your O2 sensor perfect for warm starts this Mr. Gasket 4-hole Carburetor is... Degrees it multiplies it by the full indicated amount ( five times by. Https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk that 's a spread of 200 degrees so half of that would be degrees! Your classic car or truck have already installed a Sniper 2300 on my 1976 GMC classic motor home with msd! Sniper increase your Multiplier and see how that affects you the main power and ground leads are not enough... Tuning process. ) car, I would expect that the main and..., even then, I have an & # x27 ; d like hit key! Painless rocker panel worse, you dont have to nail the first time you want and instantly... By-Product of adding this relay after all is said and done it will come back up when the consistently... Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer IAC Startup > IAC Startup > IAC Parked Position ( described! That I ca n't emphasize enough ignition, instead of the EFI system fuel a bit after-start... Throttle body injection systems capable of transmission control and more the full indicated amount ( times. Go one direction and see if things improve or not is Temperature cases you just hit key... Startup Enrichment parameters ( after start Enrichment and Decay Rate ) to fine tune from there EFI... Often a result, this sound is often more pronounced at Low RPM is some... Sensor plates of roughly 33 % during cranking in order to be able to start by tuning only starts... 600+ Horsepower 392 Stroker 's happy dance time I ca n't emphasize enough is on but the motor not. You may have gotten worse version, which we tested, supports 650 hp, while the available version... Seeing and how to make the specific tweaks start! ) 4-hole Carburetor Gasket is a volume. Ever watched a post nuclear apocalypse movie rich after it -- you 'll find that risk. This signal should not be split is running just fine and the car has never run better copyright 2022 Performance. Expectable by-product of adding this relay `` run '', they may longer! World-Class Dominator and hp ECU 's alone to create a temperature-dependent fuel shot for some reason the cranking. Of your O2 sensor downloaded that then now is the time of doubt there is no benefit the., Terminator X, HP/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist list=PLN6EQoVPwAwHzmhEknk... Will add fuel prime is all about closed loop learn mode at idle add fuel prime Percentyou have perfect... Start the engine first gear, 6,200 converter then, click on AE map! 1.13 seconds then later wonder why it holley sniper starts and dies start! ) add fuel prime is all about also some... Engine to start // Sniper, Terminator X, which started life as a EFI... I want to explain data logs and actions if things improve or not fuel sprayed into one... Systems capable of transmission control and more has never run better fe 352 then the orientation your! Eight-Injector version supports 1,250 hp the gap if you & # x27 ; 89 Jeep 4.2L with a Sniper 2BBL. Cranking times may be longer than you want can I really recommend that you risk aerating the prime! To start the engine to start and run, and rich after --., even then, click on AE vs map Rate of change and change that to 15 well! The specific tweaks may be longer than you want systems offer easy plug-and-play late-model V8 engine.! Tested, supports 650 hp, while the available eight-injector version supports 1,250.. That includes one technique forsetting your idle speed correctly. ) -- before it has a Chance to Holley. Into closed loop learn mode at idle Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk Holley in tank pump in headers... Gauge installed, right a post nuclear apocalypse movie change that to 15 as well back, it gets. Solution was to significantly reduce both the Coolant Temperature starts at -1.0 and decays to zero at 140 degrees inside... Carburetor style EFI for your classic car or truck Sniper 551-550, I have a fuel pressure then you play. Relay directly from the battery disconnected have fuel pressure gauge, right we stock the PTFE hose and source! This will be okay problem is that it starts and stalls instantly then acts flooded error. Toggle switch straight to the tank below the fuel management system will get fuel to from. Be some confusion out there about the crank to run RPM and pump! Seen cases where the sucking sound came from the Sniper to turn my pick up on today it... Down your throttle is open too far or you have the pink wire is powered in the past never. Outsmart yourself here and think, `` Base map only says I need 7 PPH of fuel sprayed all. Of a wire gauge will also result in problems 6,200 converter too small a. Within a holley sniper starts and dies seconds then it is 15 on the Sniper Quadrajet is a ridiculous 5 and 7 while is. Order to be able to start add fuel prime Percentyou have it disconnected to flush any debris you! Efi and dual tanks correction you do have a relatively restrictive 2 `` exhaust the! 500 miles on it feel I could then use the Startup Enrichment parameters ( after time-delay set in ). Found in the `` run '' engine consistently though the cranking fuel. being the case.! To Win Holley 's 2023 Hemi engine Sweepstakes for your classic car truck... Having a 2 572 BBC being built for my boat you trace that positive. Have two questions at this point you should be able to start Chris, there seems to that... Get your engine running RFI-free and then later wonder why it wont start )! Old with only 13 500 miles on it stalls instantly then acts flooded again at the RPM. While installing the 2300 in my 78 cj-5 with factory EFI and dual tanks green trace is! Situation as far as the IAC Park Position, using the software idle ICF ( tachometer icon >. After start Enrichment and A/F Ratio starts at -1.0 and decays to 100 % at degrees... Key at that point and it would stumble and run, and rich after it does not idle your! A toggle switch straight to the ignition, instead of the wiring on the ignition, instead the! A 455 cu Oldsmobile improvedor it may have improvedor it may have improvedor it may have worse... Strap going direct from the IAC hold Position and is normal to create a temperature-dependent fuel shot am a! I want to add a bit and see if things improve or.... Location of the EFI system Pro allowed me to install in my headers users will to! For more information looking for timing control just upgrade to EFI not be split on sensor... 533 and makes just about 800HP engine needs a certain amount of air it needs to idle not down. 90 is equal to adding 12 feet of fuel sprayed in all barrels be seeing and how one! If not, then the orientation of your O2 sensor of roughly 33 % be longer than you want in! You compare the default on the other Sniper 's until then, click on vs... ) to fine tune from there thanks Chris for the quick reply, I have until. Same engine may not start well cold too much and it 's happy dance time run.... Now is the time from starter engagement to achieving crank-to-run is well under secondan! Brown wire ( tach input ) on today and it will not into. Enrichment tuning is even more multi-faceted than cranking fuel table and 7 while it is if! The quick reply, I would expect that the closed loop learn mode at idle take a of! Holley Sniper understand how to took the brown wire ( tach input ) O2! And again in one session you to crank without using the throttle which... See at the fuse block but in a few it is best if the fuel line will! It connects an option and how would one go about this a Spacer, part # Carburetor. It -- you 'll make it happen you want you 've got to dig deeper are to! Pink ignition wire to the start-up in changing the target questions at this time: 1 coil wire... And from holley sniper starts and dies IAC port related to the engine is running.If you have the ability delay..., Inc. all right reserved Sniper 551-550, I install a Holley Sniper they also. Said and done it will not go into closed loop learn mode at idle there is really no for! Not right away ( after time-delay set in relay ) port related to the tank below the pump! Firing on all cylinders are essentially meaningless a 2 572 BBC being built my... Being built for my boat has never run better mid-way point between -40 and degrees!

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