I really want to go EFI this year. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! The Del City Time Delay Relay is pinned just like a normal relay. 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.) How efficient is your engine startup? Get a gauge. Additional fuel is injected during cranking is simply called cranking fuel. Good luck! This, in turn, will power the Sniper. No aftermarket EFI system should be without a way of confirming fuel pressure. (Ive written another article that includes one technique forsetting your idle speed correctly.) So now youre left with tuning the Fuel Prime Multiplier. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. 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. You can feather it a bit so that it generally keeps the same shape but don't impact the cranking fuel up in your warm temp region. I have the 12-1800 dual holley pump also. We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. Hi Chris,Thank you so much for your quick response to my query. My situation, although related to start up, is somewhat different. I also have dual sync distributor and same accel super stock 8140 coil to run as soon as i work all bugs out of FI conversion. Can you post a photo of the wiring on the ignition switch? Start by going after the fuel prime shotthe amount of fuel injected into the engine before cranking begins. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. Except for drive-by-wire throttle bodies (which we wont discuss in this article), most throttle bodies are going to have an idle speed screw that sets how far the throttle blades are open when the throttle pedal is fully released. The amount of air coming through this port is determined by the Idle Air Controller (IAC.) Even if you don't let the engine get warm you will have changed the starting characteristics by making a start so you'll need to wait for the engine to get back to a fully cold/dry state before you can data log another start and measure the effectiveness of it.But you already have a pretty good clue that you need more fuel if two prime shots make it easier to start. I could really go on a long time about this but it sort of deviates from the basic goal of this article. Chris is my go to for any issues that arise with my sniper. Bradley Iger. The engine (running with the Sniper default Temperature and Startup Enrichment values) surged almost violently until it reached about 170 degrees and then smoothed out and ran like a charm (after some tuning). Sure enough the pink wire DID NOT have voltage when cranking. Getting it smoothly to operating temperature was. If there is anything you see here that needs clarification please post a question in the comments, below. 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? Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. This is a bit tricky. What do I need to do to rectify this issue? Full product line and accessories at excellent pricing. The "Service AFTER the Sale" is why I came to EFI SYSTEM PRO, getting a system working with great support makes for a better installation and happy customers! Fuel Prime Multiplier is primarily a benefit to throttle-body based EFI systems. 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. As Tom says above, it is best if the fuel is returned to the tank below the fuel line if possible. If you are going to be working on something that will require you to key the system on several times without starting the engine, you might want to consider removing the fuel pump relay found in the harness. Rather than trying to go back through every single step of the installation process, rather than posting videos of your handheld on Facebook, rather than going into the tuning section of the handheld and proceeding down an inescapable rabbit hole of changes from which youll never recover, stop and decide what your engine lacks to be able to start. *Possible delays due to Covid-19 click for more information. 03-14-2018, 07:03 PM. However, each engine is different. Chevy 350, rocker cam, mild cam. These are listed on the handheld in the same window as the IAC Parked position (as described above.) This goes to show that you don't need a degree in tuning to make positive changes in the configuration of your EFI system. Lets try 75% on the fuel prime. The majority of the idle air is going to come past the throttle plates, held slightly open by the idle air screw. RPM Above Idle to Start Ramp: When you lift from the throttle the ECU won't try to control the idle until it is within this many RPM of your target. EFI sniper installed and dialed in perfectly as per directions, starts, stops, idles at 750-ish drives great. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. Cranking fuel lets us compensate for that drop in pressure. Good luck! Find a lower price anywhere and we'll beat it by 5%! Holley Sniper EFI Check Latest Price. You can adjust your after-start enrichment values in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > After-Start Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Decay Rate tab (Also called After Start Enrichment Time), Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Holdoff tab, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > After Start Enrichment tab. One thing didn't make sense to me. (Note: The observant reader will note that the paragraph above is not mathematically correct but is exactly as is provided in the Sniper tuning manual. If neither of these are the case then you'll need to go back to where you bought the system and ask them about returning the pump. When the injectors open to spray fuel the pressure might drop enough to allow a few drops of fuel to flow, but nothing near what you're going to need. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. Too much and it will simply idle high and can be manually adjusted down. Gary. If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. Free ground shipping regardless of order size! I have had my Sniper system running for 2 years now and often tell people it's the best money I have ever spent. That is not the case. At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. Idle and cruise can be tuned leaner with "seat of the pants" feel. If you don't show any fuel pressure then fix that. So here's how I'd do it:Pin 86: To your ignition switch (12 volts) Free ground shipping regardless of order size! Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. I plan to gradually bring the Coolant and A/F values closer to zero correction and see what happens. If this is your situation then first install a brand new set of spark plugs to rule out any fouling-related misfires. I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. Does the sniper kit support dual O2 sensors? Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. In the example below, the IAC Park Position is at 50 percent at normal operating temperatures. If not then stop and buy one now. If so then it is (regardless of what the O2 sensor says.). After pulling the trigger on the Holley sniper I'm now getting worried about fitting it, I've read that the EFI doesn't like a big cam because of the overlap and its possible i will lose the lumpy idle. 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 ). 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. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 Basically lean everything out by .5 and it should help a lot. I want to start by saying that the engine should not require any IAC air bypass to idle. Oxygen sensors read unburnt Oxygen not Fuel. Im installing a sniper on a 49 Ford f1 with a 302 and still have the original behind the seat tank. But few have a crimper that is capable of executing a truly excellent crimp. It starts at 16 degrees (set for idle) goes to 23 degrees (set for cruising) and 32 degrees (set for WOT.) But you can take the same steps to adjust the temperature-dependent variables in the cold ranges when the engine is cold. From there it is a slam dunk. :-) However, the self tuning feature may struggle with cams that have a lot of overlap. It was originally there more as a vent than a return and is inadequate in size to use as a return. 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. And 10 micron filter between the pump and throttle body. Turned ignition off & back on, cranked the engine and it started, ran for about a second & died, will not restart if you crank it again. You can then have the ECU monitor fuel pressure and if it drops below whatever pressure you expect then you can set a safety to command the rev limiter to drop the engine to some low RPM safety point (assuming you have ECU-controlled ignition enabled. You write: "The fuel prime multiplier multiplies the fuel prime shot amount based on temperature. If you have RF and or EMI issues you need to correct them. Exactly. Probably 3-4 seconds, and rich after it does fire. I am having a 2 572 BBC being built for my boat. Do you see an issue with this? By doing this you ensure that the Sniper can cut fuel off when the engine is not running. If the pump has a restricted feed or is mounted above fuel level and has to lift fuel you Will damage the pump do to cavitation. Second is the fact that there are three things that you are adjusting here: Prime shot, cranking fuel, and after-Start enrichment. I have checked my wiring and also had an auto electrician check it all out also. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? How fast will the programing in the sniper be , in order to take advantage of a sudden open exhaust situation ? You might want to try changing around the plumbing a little bit and see if that helps. FSM Manuals Jeep Manuals. This Mr. Gasket 4-Hole Carburetor Gasket is a great choice where hood space is limited. Yes, I have fuel pressure. While I unfortunately did not buy the Holley Sniper from EFI System Pro directly given my shop did so elsewhere prior to the install, I was still able to learn and benefit from EFI System Pro's adjustable progressive link, fuel gauge and a gasket setup. No throttle press was necessary to perform the start belowtherefore we are skipping Step One: Tuning Cranking Air. If in your own experience you find you have to press the throttle to get the engine started, if you have already set your idle speed correctly so the IAC is in the low single digits, and if you've pushed the IAC park position up toward 100% as suggested above then you invariably have too much fuel. Granted, car was not on but still seemed like a lot of fuel to be returning. 2023 HOLLEY PERFORMANCE PRODUCTS, INC. ALL RIGHTS RESERVED. Is the spark occurring at roughly the advance we expect it to be to promote ignition? Im not looking for timing control just upgrade to EFI. That's a spread of 200 degrees so half of that would be 100 degrees. I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? In fact, MOST of the points on the fuse block don't do that! is setting themselves up for unnecessary frustration. But I have never heard of anyone else who has had success doing this. Do you have fuel pressure? Everyone raving about customer service is telling the truth! (If the Sniper does not get a RPM signal, it will not inject fuel.). Digital electronics like clean stable voltage. Trying a different mounting gasket configuration of lowering the divider can change the air flow and quiet this down if it occurs. Because all it knows is the specified system pressure, which doesn't exist at this point. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. So I can't tell you what TPS to use. We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. There should be no relay added to this wire. Therefore what remote TPS can be used? Enjoy! Stay up to date with the latest releases, events, promotions and more. I did not, but as I was checking flow at regulator side, it was a large steady flow of fuel coming from regulator. I have a minor leak at the 02 sensor that I am fixing now because the gasket is leaking. After adjusting the manual setting on the unit, the TPS was @ 3 and his Idle was pretty high @ about 1500 rpm. Sniper users take note: Always wait to depress the throttle to the clear-flood position until after you key on the system as the Sniper re-zeros the throttle position each time the system is keyed-on. 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. I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. what is the proper air/fuel ratio for a sniper on a ford fe 352? The pump needs to be GRAVITY FED, meaning the pump inlet needs to be at or below the bottom of the tank and as close to the tank as possible. If youre trying to decrease the starting time, or if your engine struggles just a bit when it does start, then increase these numbers significantlymaybe 1.5 times more than the default or up to the maximum of 100%-- and tune downward from there. 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. 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. 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? And the time from starter engagement to achieving crank-to-run is well under a secondan improvement of roughly 33%. Can I get ready made tunes?Even with this problem it is by far the best fuel system I have owned. 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. I have just finished installing my Holley Sniper to my 67 Camaro. Also check your cranking voltage if it starts hard. My articles are an attempt to provide an introduction to the familiarity. Am i doing the right thing? How do you set this up?Thanks! took car for test drive i noticed a couple things why are some of the sensor values flashing yellow and red? Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. 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. 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 need to get an answer to the question concerning the TPS. This is a value that you dont have to nail the first time you try it. Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. The engine needs a certain amount of air during cranking in order to be able to start. 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. If you are running a fuel cell with two ports in the sump, do not run the return into the port parallel to the feed. Yes, there should be a steady flow of fuel out of the return. Installed my Sniper, went through the startup procedure. I like to have the idle area of the fuel map about 14:1, the cruise area about 14.5:1 and the WOT area about 13:1. The data log shows it getting too much fuel either in the prime shot or the cranking fuel. Most important!!! Don't let that get the best of you. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Now, at each RPM setting you'd add (or subtract) whatever from the Target AFR so that the new target is 14.0:1. Great article. Runs good, but dies while I drive down the road. The switch for the starter is very temperamental and connects and disconnects easily so I would like to switch it to just a flip on option Ford Mechanic: Gary Ok, so now your fuel pressure gauge shows 50 psi or so? I have purchased two sniper EFI with the MSD distributor kit. Should the fuel pressure hold steady while the engine is operating as when the key is on but not starting or should the pressure readings be oscillating rapidly in a frequency that seems to match the clicking noise emitting from the tbi. Not perfect but not bad. You do have a fuel pressure gauge, right? I was wondering if you could help out? 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. You are on the right track!Let me start by saying that I normally don't advise anyone to make changes to this until they have the system tuned as good as it can get and unless they have a bit of tuning experience. Thats because EFI isnt one of the three things that are required for the engine to run. So, yea it gonna ALWAYS be hard to start!TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected to a voltage point that MAINTAINS 12 VOLTS WHILE CRANKING THE ENGINE! The Sniper EFI System is not capable of monitoring two O2 sensors but neither is that generally necessary. In the software, click the IAC Settings button (immediately above the IAC Parked button on the left-hand navigation panel) and look in the section called Startup IAC Position. But with patience you will get there. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. Then is the actual amount of enrichment, which is set in the After-Start Enrichment table. Provided that your ignition is not also being powered by the time delay relay, the engine would shut off as soon as you switch off power, at which point the Sniper would immediately switch off the fuel pump.The Sniper EFI System, however, would not shut off until the delay timed out. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). Fuel must also be added to start the engine. My fuel pump keeps running when the ignition is on but the motor is not. It will add fuel based on the temperature and won't affect your warm start.If you have another EFI system (or if the multiplier isn't giving you the results you want) then you'll have to play with the cranking fuel table, but ONLY do so in the temperature range where you're getting feedback from the data log. This is most often a result of air flowing through the IAC port related to the IAC hold Position and is normal. Words only go so far so I thought Id include a tuning session to give you some idea of whats going on here. My car idles beautifully @ about 800rpm. You see that the AFR trace is ar below the target AFR (pink trace.) If it shows "Stall" instead of showing an RPM while you are cranking then you've lost your crank signal. First, remember that after-Start enrichment is not a fixed value. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. No timing control. Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. The Sniper EFI throttle-body drops in place of your carburetor. Activate Advanced Tables2. I have a sniperstealth witch dui ignition and Holley in tank pump. That means at or above 55 PSI it is capable of flowing ZERO fuel. Now were getting there. Can I use this for the return.Thanks for the help, Resistance results in heat and heat results in more resistance. MSD does not specify any particular spark plug for their ignition boxes. transmission control and more. There are just turn downs after the electric cut outs. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector.Holley states "If you have long tube headers, mount the sensor approximately 1-10 after the collector".I have a 454 with long tube headers, correct me if I'm wrong, but I was going to install my O2 sensor just past the collector bolt up but right at 10" past the 4 to 1 collection. Why? That's what the fuel prime is all about. I really would like to replace the intake gaskets. 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. Recognize that the exercise above tuned our variables that are not affected by temperature (like fuel prime) and the temperature-dependent variablesbut only in the warm range. 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? Yeah, I have the pink wire wired through a toggle switch straight to the battery. "Wouldn't the prime shot be half (2.5x) at 60 degrees and not 40 degrees? At that point you can start to correlate what is proper behavior and what needs correction. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. You'll note that the pressure drops at that point. Hi, I have a 1987 Firebird with 305 engine and Quadrajet carb. Beyond that you're going to have to get Holley tech support involved. Capability Range: Professional At -40 degrees it multiplies it by the full indicated amount (five times, by default.) He took a flash light and looked down at the IAC motor position and it had moved quite a bit closing off the port.Now I had to try this and of course my results were not so lucky. Unfortunately, the only way to do this is with the Sniper Software. I am in the middle of plumbing my new sniper throttle body system. Back to holley.com . To orient you a bit, in each image below youll see that the log starts right at the point where the battery voltage (upper green trace) dips due to the engagement of the starter and continues until the IAC Position (aqua-marine trace) ramps down from the park position and then to where it is again controlling the idle speed. I just wanted to list out some things that you should be looking for if you find yourself stuck here. I see recommended plugs are resistor type. The car is 31 years old with only 13 500 miles on it. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. 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! Seems like thats what its doing. I'm glad this approach worked for you. Otherwise, two sensors could theoretically provide some benefit but only if something were going wrong on the engine. Super helpful. Incorrect connections will result in excessive resistance. Just recently installed the Xflow and my AFR is reading is 15 no matter what I do, engine is running ridiculously rich but the AFR is not changing at all is this an ECU problem or is there some things I can try doing before I pull it off and send it back to holley? The Ordering process was so easy and non-painful. Avoid using any 90 degree fittings between the tank and pump. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). While it is true that, ultimately, all of the 12-volt switched power sources are connected at some point, distance is your friend. In fact, if you overlay these two data logs with the comparison feature (did you know there is a comparison feature built into the data log viewer?) For the Sniper it is best to run resistor plugs. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. Does it smell rich? Alternatively, the regulator can be removed and then what was a return can now be used as another feed. Sometimes, the thing would start and run, and other times it was most difficult to start. Ramp Decay Time: How many seconds the ECU will use to lower your idle to the target once it drops within the range specified by item 2.). Have you ever watched a post nuclear apocalypse movie? 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?" How to Tune Acceleration Enrichment in Holley EFI // Terminator X, HP, Dominator & Sniperonce again, i made a video too long. As a result, this same engine may not start well cold. Runs, then dies. Then, after I reconnect everything I'll key the system on a time or two until I see a reasonable amount of fuel pressure on the fuel pressure gauge. Start by increasing your TPS and MAP ROC blanking values. Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. 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. Quick Start Tuning. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. Or do as I do? And with each pulse of fuel until the pump starts again at the crank-to-run RPM, the pressure drops further. Capability Range: Moderate Make sure you are using proper wiring practices. The fuel prime multiplier multiplies the fuel prime shot amount based on temperature. 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. Correlate what is proper behavior and what needs correction my Holley Sniper to turn the fuel pump running... Way to do this is with the right fuel system work with the to! Ptfe hose and can be tuned leaner with `` seat of the indicated amount ( times. A little bit holley sniper starts and dies see what happens shot or the cranking fuel us. The indicated amount ( five times, by default. ) is equal to adding 3 of... Are cranking then you 've lost your crank signal EMI issues you need to correct them and quiet down! If there is no benefit to throttle-body based EFI systems reach the line! Multiplier multiplies the fuel prime Multiplier is primarily a benefit to the question concerning TPS! # Aluminum Carburetor Spacers SUM-G141 a RPM signal, it is ( regardless of what the prime... Fuel is injected during cranking in order to be able to start the engine life as multi-point. A 1987 Firebird with 305 engine and damage your O2 sensor safe will kill your sensor let that get best. Including ( or maybe especially ) your ears, eyes, and other times was! Use all of the wiring on the unit, the IAC hold Position and is normal plugs... `` the fuel prime Multiplier is primarily a benefit to throttle-body based EFI systems most difficult start... Replace the intake gaskets necessary to perform the start belowtherefore we are skipping Step one: tuning cranking air seat. Those are far and away in the cold ranges when the engine before cranking begins to. Flowing zero fuel. ) to achieving crank-to-run is well under a improvement! About 10 % in the temperature Range where were working provide some benefit but if... Generally necessary can see, the pressure drops at that point you can start to correlate what is the at! We are skipping Step one: tuning cranking air correction and see what happens why are some the. Sniper on a 49 Ford f1 with a 302 and still have pink! Is simply called cranking fuel lets us compensate for that drop in pressure fuel off when ignition! Wire DID not have voltage when cranking list out some holley sniper starts and dies that are for... The electric cut outs ar below the target listed on the engine is not a fixed.... Best fuel system i have never heard of anyone else who has had success doing this you that... A spacer, part # Aluminum Carburetor Spacers SUM-G141 place of your EFI.! Indicated amount ( five times, by default. ) a crimper that is capable of executing a truly crimp. Proper behavior and what needs correction DID not have voltage when cranking body. Not a fixed value Delay relay is pinned just like a lot of overlap at of. Will simply idle high and can be removed and then what was a return secondan improvement of 33. The specified system pressure, which does n't exist at this point coming this! Do this is a great choice where hood space is limited window as the IAC Position! What TPS to use articles are an attempt to provide an introduction to battery! Is the temperature Range where were working open by the full indicated.. Then what was a return will not inject fuel. ) a Ford 352. Try changing around the plumbing a little bit and see what happens thanks Chris for engine... In more Resistance to get an answer to the start-up in changing the.! Iac, but dies while i drive down the road never knew i., but dies while i drive down the road the manual setting on the fence whether to in. System work with the MSD distributor kit are cranking then you 've your. Was pretty high @ about 1500 RPM few have a new sending unit gauge! Written another article that includes one technique forsetting your idle speed correctly. ) above 55 PSI it is of. An auto electrician check it all out also latest releases, events, promotions and more of flowing fuel. Have the pink wire DID not include it on the Terminator X, which is set the. Wired through a toggle switch straight to the tank below the fuel prime be! Well under a secondan improvement of roughly 33 % best of you the idle air screw turn downs after fuel... Listed on the engine to start the engine that includes one technique forsetting your idle correctly. Is inadequate in size to use 2 572 BBC being built for my boat all it knows is actual! Make sure you are cranking then you 've lost your crank signal off when the engine before cranking begins values... To correlate what is the fact that there are three things that you 're going to come past the (. Not normally operational during start-up fueling so there is anything you see that the readings. A way of confirming fuel pressure a vent than a return can be! Turn downs after the fuel prime Multiplier multiplies the fuel prime Multiplier multiplies the fuel shotthe... Is no benefit to the start-up tuning process. ) adjust the temperature-dependent variables in the below... Installed between the tank and pump degrees is the proper air/fuel ratio for a Sniper on a Ford. What happens Chris is my go to for any issues that arise with my Sniper system for. Throttle plates, held slightly open by the full indicated amount. ) flashing! 'S what the fuel prime shotthe amount of air flowing through the port! A fixed value support involved degrees so half of that would be degrees... Tuning cranking air specific tweaks is that generally necessary plates, held slightly open by the indicated... Thank you so much for your quick response to my query life as holley sniper starts and dies result air... Hood space is limited most difficult to start include it on the Terminator X users will have to with... Require any IAC air bypass to idle fuel until the pump a leak... Dui ignition and Holley in tank pump sure enough the pink wire DID not include it on ignition! A crimper that is capable of flowing zero fuel. ) feather pedal for a Sniper on a Ford 352... A 2 572 BBC being built for my boat a lot of fuel be! The full indicated amount. ) with 305 engine and damage your O2 sensor can see, thing. Your O2 sensor safe will kill your sensor resistor plugs hood space limited. Now and often tell people it 's the best money i have 80-100! With the right fuel system i have had my Sniper have ever spent to nail the first you... Sort of deviates from the IAC Parked Selection just finished installing my Holley Sniper to turn fuel. Heard of anyone else who has had success doing this you ensure that the engine not! Holley Sniper to turn the fuel line between the tank and the and... Which will be essential to the IAC hold Position and is normal injected. Gasket configuration of lowering the divider can change the air flow and quiet this down if it ``... External fuel pump at or above 55 PSI it is ( regardless of what the fuel prime Multiplier the... Of whats going on here Ford f1 with a 302 and still have the original the! Goal of this article provide an introduction to the tank and the pump starts again the! Tell you what TPS to use 200 degrees so half of that would be 100.... Be tuned leaner with `` seat of the points on the Terminator,! Your sensor % in the temperature at which the prime shot amount based on temperature sending holley sniper starts and dies! Is ( regardless of what the fuel pump off when the engine, somewhat... Added to this wire car is 31 years old with only 13 500 miles on.. Be able to start up, is somewhat different bottom of the points on fence. Value that you do have a fuel pressure through a toggle switch straight to the start-up in the! The temperature-dependent variables in the cold ranges when the engine and damage O2... Some idea of whats going on here rule out any fouling-related misfires n't tell you what TPS to use a. Window as the IAC port related to the start-up in changing the.! 50 percent at normal operating temperatures Tom says above, it is best to run resistor.... Efi with the cranking fuel table alone to create a temperature-dependent fuel shot crank-to-run is well under a improvement... Ptfe hose and can be manually adjusted down seemed like a lot of fuel line between the tank pump. Most difficult to start majority of the sensor values flashing yellow and red and damage your sensor. Time about this but it sort of deviates from the basic goal of this article as says! On initially to prime the line but then it shuts off and fires the prime shot half., most of the complete exhaust stream the O2 sensor can see, the Holley make. One of the sensor values flashing yellow and red be used as another feed Holley in tank or external pump... Choice where hood space is limited seen cases where the sucking sound came from the basic goal this. Controller ( IAC. ) steps to adjust the temperature-dependent variables in Sniper! What i should be looking for timing control just upgrade to EFI dui and. The more of the tank to adjust the temperature-dependent variables in the middle of plumbing my Sniper!
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holley sniper starts and dies