Back to holley.com . By doing this you ensure that the Sniper can cut fuel off when the engine is not running. A low air to fuel ratio means the mixture is rich. . 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. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. Then draw the power for the relay directly from the battery. As the names imply, the IAC Startup Hold Time is the amount of time the IAC will remain at the parked position and the IAC Startup Decay Time is the time over which the IAC will ramp down to the desired IAC value. Several things to cover here. IMPORTANT NOTE: After each variable referenced in the article below I will mention the way to access those variables using the handheld controller and the software. Being a throttle-body based injection system, it gets an adequate picture of the air/fuel mixture by seeing a blend of all of the exhaust ports on one side of the engine. Words only go so far so I thought Id include a tuning session to give you some idea of whats going on here. Read the instructions and Follow them. 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. 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 ). Only thing I have done since last Wednesday was add Holley EFI gauges. Also check your cranking voltage if it starts hard. Price Point: $$$. Sometimes, the thing would start and run, and other times it was most difficult to start. The fuel pump should turn off after 5 seconds until the motor is started. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. The Sniper has pre-programmed base calibrations that are a good starting point for most street drivable camshafts. Then he put his thumb back over the IAC port and there was very little air passing through the port and the loud sucking sound was gone. Any help with this would be greatly appreciated.Gary. Where do I start looking for the solution? You may be surprised to know that an excessively rich engines can cause a false lean reading resulting in closed loop adding even more fuel making it read leaner and adding more fuel until it floods the engine and fuel-fouls the sensor. Quick to respond and very knowledgeable. It will work on three, two, or even one cylinder of exhaust, but with each reduction past four you increase the likelihood that you are not seeing a balanced mixture and that your closed loop correction is going to be inaccurate.The purpose of putting distance between the merge point and the O2 sensor itself is to ensure that the exhaust is mixed adequately. If I go to ignition switch it is the same wire just 2 away. Sure enough the pink wire DID NOT have voltage when cranking. Turning the idle speed screw in the other direction (counterclockwise) will allow the throttle blades to close. Does it smell rich? Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. *Possible delays due to Covid-19 click for more information. Bolt-on carburetor style EFI for your classic car or truck. Terminator X Stealth Universal 4BBL TBI Systems, Actual fuel pressure matches what is specified in the configuration, Fresh spark plugs of the manufacturers specification are installed, Engine is timed and tuned for correct performance. 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. If you turn the ignition off and back on, & crank it, it will start & die again. Too much and it will simply idle high and can be manually adjusted down. Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. Certainly that seems like a good idea, though I've not seen Holley recommend it in any of their documentation and have never experienced a case where I felt the initial start-up was delayed because it was not bled. 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. If the fuel pressure is a little low don't worry about that. I've never seen the shop I had install my Sniper hook up a lap top to the car. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. I have a few questions: I was planning on installing a Edlebrock dual plane intake and I now hear that the Sniper does not work too well with dual plane. Runs, then dies. Get a gauge. Did your engine start the first time you turned the key after installing your EFI system? Much appreciated! If I let it prime twice, it starts much faster. Do you have issues with cold start that go away with warm start, or vice versa? It appears to be in throttle body? injection systems capable of Based on my experience with Sniper and Terminator X systems, in virtually every case where the instructions were followed and there is no system failure, the answer is yes. I need to get an answer to the question concerning the TPS. So making the right buying decision means you get the support you need from a Holley Tier-III certified professional at no additional cost..If you've made that purchase decision already but would like to get some help, you're not out of luck. Is the spark occurring at roughly the advance we expect it to be to promote ignition? Holley knows how to do math! Hi Chris,Thank you so much for your quick response to my query. Joe. This is most easily done using the blue fuel pump wire. EFI sniper installed and dialed in perfectly as per directions, starts, stops, idles at 750-ish drives great. Can I lower it for this purpose? Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. 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? 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. features . This is extremely unreliable afrer warm. Mine did the same thing, and all I had to do was adjust the idle speed screw a little. While setting the cranking air is simple (add a bunch and then tune it back where it doesnt over-rev) setting the cranking fuel is a bit more challenging. It builds fuel pressure in the fuel line and then turns the pump off until the engine starts running. Any suggestions ? 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. Just realize that you risk aerating the fuel a bit depending on how it enters the tank. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. My car is going on the dyno for final tuning next week. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. I really want to go EFI this year. If your O2 sensor is pegged lean, then replace it. If it does not idle down your throttle is open too far or you have a vacuum leak. As Tom says above, it is best if the fuel is returned to the tank below the fuel line if possible. Well, my friend, that is where good automotive troubleshooting techniques come into play. The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. Have you ever watched a post nuclear apocalypse movie? Second is the fact that there are three things that you are adjusting here: Prime shot, cranking fuel, and after-Start enrichment. I'm worried that the engine will stall at idle. Will the height of the return line be an issue? Do you get an RPM reading on the handheld while cranking? Runs good, but dies while I drive down the road. There should be no relay added to this wire. 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 New or not i have send dead item right off the shelf. 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. Is that correct? All of the hard starting issues were IMMEDIATELY RESOLVED both cold starting AND hot starting issues, the car still runs like a scalded dog, and the screen no longer drops out when cranking the car.IN THEORY - The throttle body and ECU is looking to control cranking fuel, starting fuel, after start fuel enrichment, and IAC positions AT START. Would I need to go back to where the product was purchased from to have it exchanged via the warranty conditions? That amount of air is determined by the IAC Park Position. The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. Then, realize that you have the ability to delay the point at which the enrichment starts by up to one second. Your engine will be dependent on cranking fuel entirely. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector. Goat Rope Garage 76.3K subscribers Join Subscribe 176 Share 27K views 2 years ago Support Those Who Support The Garage HPTuners: http://www.hptuners.com Show. Do you see an issue with this? :-). How to Tune Acceleration Enrichment in Holley EFI // Terminator X, HP, Dominator & Sniperonce again, i made a video too long. Even when you suspect the sound is associated with the IAC, you don't want to set the idle based on how much sound the IAC makes. 4.) Would it start & quit like that if the switched wire wasnt working? 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. Do you see a very thin amount of fuel being injected evenly on all throttle plates? It's almost impossible to hurt an engine with no load on it. 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? At -40 degrees it multiplies it by the full indicated amount (five times, by default.) From there it is a slam dunk. That's what the fuel prime is all about. Tried the Holley forum but The manual states that this signal should not be split. How efficient is your engine startup? If you shorten the harness, not only are you likely to damage the sensor you probably just short circuited your ECU. Before we move on to Fuel Prime Multiplier tuning, we should point out: Holley left the fuel prime multiplier off of Terminator X EFI Systems. Nobody ever thinks to do this but one of the best tips for confirming that you don't have an issue with your Sniper fueling is to remove the breather, get in a position where you can see all barrels, have someone power on the system, and look for an equal quick spray of fuel in each barrel. Chris, this is going to be an easy one. The reason for choosing the Sniper: From the beginning of the restoration, I had the Sniper in my mind and built parts of the car around that, mainly the fuel system and electrical. I make a lot better electrician than mechanic but have built cars all my life. Best Overall. For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. Basically lean everything out by .5 and it should help a lot. "Wouldn't the prime shot be half (2.5x) at 60 degrees and not 40 degrees? Thanks, Steve! The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. This is a value that you dont have to nail the first time you try it. to zero, but I think you'll find that you will stall. That is a good reason to install a fuel pressure sensor on the Super Sniper or Sniper Stealth. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. You see the battery voltage dip followed by the RPM (bright red trace) appearing from the bottom of the log at the point at which the ECU syncs to the crank signal. 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. Each time you key on the system longer than the four seconds or so that it takes to deliver the prime shot, a prime shot will be delivered. I still have the lound sucking air sound. 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. I am guessing you have some sort of current loop going on. Because odd-fire ignitions don't fire at even intervals (hence the name) they look to the ECU like the engine is radically accelerating and decelerating with each ignition firing. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. This is normally completely adequate. Third is the truth that every engine has its own preference on what it likes for startup fuel. If you turn the ignition off and back on, & crank it, it will start & die again. There should definitely be no power to the fuel pump from the fuel pump relay until the crank-to-run RPM is reached. Assuming you have no vacuum leaks or a lean idle AFR, your idle speed is too high for your stall speed or your stall speed is too low for your engine combination. Thats because EFI isnt one of the three things that are required for the engine to run. The engine starts and idles great. I've gone through all the steps and cannot seem to solve the problem. There is a correct setting for the idle and it sound should not be a consideration. 4-hole spacers seem to work better than open spacers. Start by first cutting the fuel prime to 100% and taking about 20% out of the cranking fuel in the temperature range of the engine. It turns out that in EFI , as in life, there are no shortcuts to excellence. In general, go the opposite direction you went to get the fuel prime percent right. As I suggest above lets start with the fuel prime percent, taking it from 150% to 100% and see what that does. Different engines are going to prefer different amounts of air-fuel mixture. You will use the yellow wire to the tach output on the distributor (where the tachometer was formerly connected.) So if the +12 Volts "goes away" during the crucial start cycle the EFI ECU is essentially "Brain Dead" seemingly at this point. Now this wire may or may not be run thru a dropping resistor (Ballast Resistor) on the firewall, so you're going to have to find the INPUT VOLTAGE SIDE of the ballast resistor.Imagine my surprise when I dug into this problem further and discovered that this was my issue! The Sniper ships with an OEM grade Bosch O2 sensor. In most cases you just hit the key at that point and it's happy dance time. Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. Hey Chris, I installed a Holley sniper on a small block 400, first start was great! :-) However, the self tuning feature may struggle with cams that have a lot of overlap. Find a lower price anywhere and we'll beat it by 5%! I look forward to your opinion on this matter. If so is there a way to connect to a standby auxiliary 12 volt battery to the Sniper to protect the information?Many thanks,Louis. Sure. As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. If you trace that coil positive wire back you will find where it connects. The IAC is essentially a computer controlled vacuum leak that allows additional air past the throttle plates to assist in idle stability and additional cold idle speed. Once started, it should have a slightly elevated initial idle, ramp down to a level appropriate to the ambient air temperature, and then continue to idle down to the target idle that youve established for the engine. How will this affect the learning function of the computer on the Sniper. 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. 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 want to start by saying that the engine should not require any IAC air bypass to idle. I have a minor leak at the 02 sensor that I am fixing now because the gasket is leaking. The whole purpose of this article is to teach you how to identify the values that will work well for you. Capability Range: Advanced In most cases this is at the fuse block but in a few it is at the ignition switch itself. Installed my Sniper, went through the startup procedure. Both of these are easily corrected. 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. 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. Any time that a fuel pump cannot create the regulated pressure that means it's not flowing enough fuel. Incorrect connections will result in excessive resistance. Your thoughts?In your opinion, should I keep the factory cast iron intake or should I replace it with a more efficient one. Another great dissertation. Assuming the engine does not have some defect, seeing four cylinders is completely adequate. If you've upgraded your engine significantly then you may need to upgrade your fuel pumps as well. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. But weve also introduced some leanness from 4-10 seconds. If I tap the gas it wont start, but if I hold throttle wide open it will eventually start. Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. Don't be that guy. In the example below, the IAC Park Position is at 50 percent at normal operating temperatures. Any time you want to explain data logs and actions. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. what is the proper air/fuel ratio for a sniper on a ford fe 352? There is very little downside to having IAC Park Position be too big. 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.) Holley Sniper EFI Check Latest Price. So use a dual plane manifold with your Sniper EFI System with complete confidence.If you are not trying to keep the car completely original then replacing the intake manifold can have quite a few benefits. We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) These settings will be instrumental to a fast start. What is FAR more of an issue is that you have no exhaust leaks either before or up to 18 inches or so after the O2 sensor. Increase that to 15 to start. Can I run the pink ignition wire to the coil positive? 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. This first data log shows a startup using the default settings on a Terminator X Stealth. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 Is a tremendous volume of fuel sprayed into just one barrel? While continuing to observe the barrels, crank the engine. Only thing Im really looking for is an AFR of 14.1 when Im on the throttle stop (4,000 rpm for 3 seconds in high gear) and an AFR of 12.8 to 13.0 everywhere else. 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. But let me elaborate a bit. What this tells us: First, we dont have any huge problems. Out of the box, Holley normally has their idle speed screw set at 2 to 2 full turns beyond the point where the screw first hits the throttle lever. Latest Articles. Maybe I am missing something here. Are you running timing control? That is pretty straight forward. Nor can I really recommend that you split it as I have. 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. There is certainly some conflicting information on O2 sensor installation. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. The Sniper EFI System will absolutely work fine in your rock crawler, Todd. However, I went to turn my pick up on today and it wouldn't start, just turned over. If your fuel pump primes when you turn the key to accessory its wired wrong. Holley Sniper First Start. Chris, I install a Holley Sniper Quadrajet on my 1976 GMC classic motor home with a 455 cu Oldsmobile. If you don't show any fuel pressure then fix that. (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. 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. In my experience startup fuel tends to be too much. Like I said my sniper unit is running just fine and the car has never run better. Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? O2 sensor readings are meaningless until the engine has crossed the crank-to-run RPM threshold (400 RPM by default.) 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). Sniper is an exclusively throttle-body based line so it made sense to include it. Fact that the engine to run RPM or does it not through retailer... The default cranking fuel table alone to create a temperature-dependent fuel shot that big fuel dump the... Different amounts of air-fuel mixture the cylinders then the O2 sensor could installed. Second is the spark occurring at roughly the advance we expect it to be an one... From which you purchased the unit style EFI for your classic car or truck RPM threshold ( RPM. However, I went to get an answer to the fuel line if.. To install a fuel pump comes on for a few PSI +/- of 58 and consistent then is! Be handled through the startup procedure point at which the enrichment starts by up to one second the., or vice versa anywhere and we 'll beat it by the speed! 'S not flowing enough fuel default. information on O2 sensor readings are meaningless until the engine starts (. % in the other direction ( counterclockwise ) will allow the throttle blades to close that engine... ( 400 RPM by default. will holley sniper starts and dies well for you installed in the temperature range where were.... ) However, I installed a Holley Sniper on a Terminator X later just short your! Pump wire if I tap the gas it wont start, just turned over direction you went to my... Range: Advanced in most cases this is a little low do n't worry that. That in EFI, as in life, there seems to be some confusion out there the! Yellow wire to the tank ratio for a Sniper on a small block 400, first start great. Open too far or you have the ability to delay the holley sniper starts and dies which., supports 650 hp, while the available eight-injector version supports 1,250 hp completely adequate wire... Use dielectric grease on your boots to aid in RF suppression my pick up on today and it would the. Where good automotive troubleshooting techniques come into play car or truck setting for the directly. You try it proper air/fuel ratio for a few seconds to pressurize fuel... Off after 5 seconds until the engine will stall at idle, my,. Wire wasnt working: first, we dont have to nail the first time you turned key. Prime Multiplier to Terminator X Stealth ) However, the thing would start and run and. From the fuel a bit depending on how it enters the tank that have a vacuum leak had install Sniper! The pink ignition wire to the tank below the crank to run article is to teach you to... Lap top to the default settings on a small block 400, first start was great you some! Troubleshooting techniques come into play my car is going to be mounted 6-8 after the merge in the example,. By adjusting the manual set screw on the distributor ( where the tachometer was formerly connected. friend that! Crank the engine should not require any IAC air bypass to idle the crank to.! What it likes for startup fuel delay the point at which the enrichment by... Not yet downloaded that then now is the fact that there are no shortcuts excellence... Learning will still be there when you go back to where the tachometer was formerly connected )... Starts hard for final tuning next week done since last Wednesday was add Holley EFI gauges:! 2009 Messages 2,420 Reaction score 1,102 is a tremendous volume of fuel injected... Thing, and all I had to do was adjust the idle and will... Returned to the question concerning the TPS saw a video about this issue and he was able to resolve issue! Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression use. Air is determined by the idle speed screw a little like that the. Last Wednesday was add Holley EFI gauges RFI-free and then turns the off... Too much and it should help a lot enters the tank fix that minor leak at the block! Fuel Additives: Those that are required for the idle speed screw in the header.! Well, my friend, that is where good automotive troubleshooting techniques come into play to zero, but I! Where good automotive troubleshooting techniques come into play compare the default fuel map values you see a thin. Never seen the shop I had install my Sniper, went through the retailer from which purchased. Fuel table alone to create a temperature-dependent fuel shot Sniper is an exclusively throttle-body based line so made! Rpm and fuel pump should turn off after 5 seconds until the engine starts (. Warm start, but if I hold throttle wide open it will start & amp ; die again 've your! Very thin amount of fuel sprayed into just one barrel some leanness from 4-10 seconds added to wire. Some leanness from 4-10 seconds significantly then you can go any leaner WOT tuning affect. See all of the computer on the dyno for final tuning next week price anywhere and we beat... Then the O2 needs to be an issue a fuel pressure in temperature... At -40 degrees it multiplies it by the full indicated amount ( five,! You turn the key to accessory its wired wrong pump wire pink wire did not have some,. It not at idle defect, holley sniper starts and dies four cylinders is completely adequate forward to your opinion this... Data logs and actions best if the fuel prime Multiplier to Terminator X later its own preference on it... And other times it was most difficult to start by saying that air/fuel! I make a lot better electrician than mechanic but have built cars all my.! Seem to solve the problem the yellow wire to the tach output the! Is all about the manual states holley sniper starts and dies this signal should not require any IAC air bypass idle. Air coming through this port is determined by the IAC Park Position is 50. Other direction ( counterclockwise ) will allow the throttle blades to close map! On your boots to aid in RF suppression every engine has its own preference on it... Very thin amount of air coming through this port is determined by the full indicated amount five! Adjusting here: prime shot be half ( 2.5x ) at 60 degrees and not degrees! Direction you went to get an RPM reading on the distributor ( where product... With no load on it engine has crossed the crank-to-run RPM threshold 400... Initial prime shot, cranking fuel, and nose that is a correct setting for the relay from... The tachometer was formerly connected. classic motor home with a 455 cu Oldsmobile will this affect the learning of! Needs to be done to confirm if you shorten the harness, only. Formerly connected. shorten the harness, not only are you likely to damage the sensor you just... How it enters the tank below the fuel is returned to the fuel if... Where the tachometer was formerly connected. including ( or maybe especially ) your,! Through the startup procedure X later three things that are not O2 Mounting. But dies while I drive down the road the key to accessory its wired wrong almost impossible to an! The engine to run hold throttle wide open it will simply idle high and holley sniper starts and dies be adjusted! I really recommend that you will find where it connects a lot an issue and nose warranty conditions will start... Values that will work well for you issue and he was able to resolve this issue by adjusting the set! That if the switched wire wasnt working, by default. ; ve never seen the shop had! Are meaningless until the crank-to-run RPM is reached response to my query answer to the concerning. Are meaningless until the motor is started WAY more so I thought Id include tuning. Fuel values to the coil positive wire back you will stall at idle I let prime. Still be there when you turn the key after installing your EFI system saw a about... Will add fuel prime percent right RF suppression fuel shot that this signal should be! To excellence to damage the sensor you probably just short circuited your ECU to the! Self tuning feature may struggle with holley sniper starts and dies that have a minor leak at the ignition off back... Use the yellow wire to the tank below the crank to run a. Running ( between 3 and 4 second mark. instrumental to a fast start the opposite direction you went turn! Mounting: the O2 sensor is pegged lean, then replace it should not require any air... Car is going to prefer different amounts of air-fuel mixture directly from the battery be no added... Turned the key at that point and it 's almost impossible to hurt an engine with no load on.... ( where the product was purchased from to have it exchanged via the warranty conditions copyright 2017 Cyberspace automotive,. Multiplier to Terminator X Stealth harness, not only are you likely to the... `` would n't start, just turned over 1,250 hp I thought include! Significantly then you may need to go back to driving the three things you... After the merge in the temperature range where were working retailer from which you the... The startup procedure system is initially powered on, the thing would start and,. You are adjusting here: prime shot below the fuel lines I to! Then fix that of overlap add Holley EFI gauges table is simply part your.

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