Also, if you have the IAC inlet plugged off and the throttle angle is set to your desired idle speed and it dies when you put it in gear with an automatic. Most important!!! I am letting it set over night, cleaned plugs as well. There should be no relay added to this wire. Go Gators. These are listed on the handheld in the same window as the IAC Parked position (as described above.) Chevy 350, rocker cam, mild cam. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. 3.) Whats the fix? If that works then try halving them again. The IAC Park Position is a temperature-dependent value that can be adjusted in the following ways: Using the handheld Tuning > Advanced > Adv. Nice catch, Ken! Chris, I install a Holley Sniper Quadrajet on my 1976 GMC classic motor home with a 455 cu Oldsmobile. Is the sniper compatible with my distributor? Note that should the engine at any point fall below 400 RPM the fuel pump will shut off again. Good point. Basically lean everything out by .5 and it should help a lot. I'm worried that the engine will stall at idle. If not, then the orientation of your O2 sensor is not your problem. Getting the engine running was never a problem. I have been looking at all efi units and I keep coming back to the Sniper. But I have MSD 6 AL. How do you set this up?Thanks! 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? Installed my Sniper, went through the startup procedure. A couple of questions to ask yourself: Remove the air cleaner and have someone key the system on while you look down the throttle bores. We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) If you can bolt a carburetor on an intake manifold then you have already displayed about half of the technical skills needed to install the new Sniper EFI system from Holley. Is that an expectable by-product of adding this relay? Fires up & runs perfect. Copyright 2022 Holley Performance Products, Inc. All right reserved. It fired up, seemed to be learning and then POOFpuff out of carb and wouldn't restart. Starts & immediately dies. Oxygen sensors read unburnt Oxygen not Fuel. First, there is the obvious--the system has to learn. Don't let that get the best of you. Is this normal? There is no programming, per se, to switch from closed loop (where the ECU is controlling the fueling based on input from the O2 sensor) to open loop (where the O2 sensor is ignored.) Too much and it will simply idle high and can be manually adjusted down. At least not right away (after time-delay set in relay). i can hear the pump, but nothing is coming through the fuel line. I have just finished installing my Holley Sniper to my 67 Camaro. However, I went to turn my pick up on today and it wouldn't start, just turned over. Yes, I have fuel pressure. I am running a wet exhaust with O2 sensor plates. 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. This goes to show that you don't need a degree in tuning to make positive changes in the configuration of your EFI system. I figured it would be minimal. Seems like thats what its doing. Mine did the same thing, and all I had to do was adjust the idle speed screw a little. 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. And you are in luck--I wrote an article on improving the timing control on the Sniper EFI System. 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. 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. Bolt-On EFI for your In fact, they may be terrible values when applied to your engine. 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 ). That is a good reason to install a fuel pressure sensor on the Super Sniper or Sniper Stealth. 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. Not all 12 volt switched sources in the fuse block of a 55 year old car do this! 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. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. Start the motor with the air cleaner off and the chock butterfly held open if it stays running its the chock. I am having a 2 572 BBC being built for my boat. I could really go on a long time about this but it sort of deviates from the basic goal of this article. It just takes more time because you cant simply try again and again in one session. Thats what we want, right? 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. 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. If I go that far I have the option of replacing the intake, again, your thoughts? Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? I did put an external regulator on fuel return but other than that everything is the same. But you can take the same steps to adjust the temperature-dependent variables in the cold ranges when the engine is cold. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." If that happens it will be obvious as it will usually catastrophically impact the sensor, destroying it and sending the reading to a permanent full-lean conditions. Anything else would be a big safety no-no. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. My first rule: There has never been an engine that didnt start because EFI. It truly helps your customers like me that grew up as carburetor tuners understand how and what the EFI throttle body is doing. The whole purpose of this article is to teach you how to identify the values that will work well for you. Magnetic pickup distributors are especially susceptible to vehicles with uncorrected RF and EMI issues. The engine warms up a bit each time. Gary. My question is if both of my fuel pumps are wired from relays to my rocker panel where does the blue fuel pump prime wire connect or would you just not use it altogether. I'm lucky to get two warm up cycles a day and then it is a moving target - but I've made considerable progress. 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.) First, don't get too worked up about the flashing yellow and red values. It just can't work properly.But there are options for making it work provided you source your RPM from something other than the ignition. Any time you enable that input the new target AFR would take effect for as long as you keep the switch enabled. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. Unfortunately, the only way to do this is with the Sniper Software. The Sniper EFI throttle-body drops in place of your carburetor. In most cases you just hit the key at that point and it's happy dance time. Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. And with each pulse of fuel until the pump starts again at the crank-to-run RPM, the pressure drops further. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. Can you post a photo of the wiring on the ignition switch? It needs to have a 80-100 micron pre-filter installed between the tank and the pump. I have it disconnected to flush any debris out.Thank you. I strongly recommend EFI System Pro. A throttle linkage extender and a progressive linkage kit. I am guessing you have some sort of current loop going on. Would it start & quit like that if the switched wire wasnt working? Yes, ensure the Sniper EFI switched +12V pink wire is powered in the "Run". I have a sniper 1250 with a msd 6014 and a painless rocker panel . Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. Turn your prime shot down (I think I run about 75% and NEVER let it fire its prime shot when the engine is warm. We can adjust that with the after-Start enrichmentIll bump that up a bit. EFI Systems based on Holley's world-class Dominator and HP ECU's. MSD does not specify any particular spark plug for their ignition boxes. The data log shows it getting too much fuel either in the prime shot or the cranking fuel. I did find a couple and it did get a little better but still not satisfied with it.What is the ISC hold position for and why is it set @ 30? Maybe I am missing something here. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. Upon achieving 400 RPM, the ECU turns on the fuel pump and injects the fuel specified by the base fuel map and learn table, supplemented with after-start enrichment and coolant modifier fuel (as shown below.). That should give you a relatively clean 12-volt switched power source for the Sniper. My problem is that it starts and stalls instantly then acts flooded. But never ever forget there is a second learning going on--your own. (You DO have a fuel pressure gauge installed, right? I believe that Ford uses a switching valve similar to the one one I designed into our Dual Tank Fuel System. Hey Chris, I installed a Holley sniper on a small block 400, first start was great! Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. Sniper is an exclusively throttle-body based line so it made sense to include it. Full product line and accessories at excellent pricing. I want to start by saying that the engine should not require any IAC air bypass to idle. Therefor, -40 + 100 degrees = 60 degrees. It is likely that the main power and ground leads are not long enough. Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. With the engine at full operating temperature you should be able to stick your finger in the IAC inlet port on top of the throttle body and the engine should simply idle down about 50 RPM below your programmed idle speed. One thing I miss is the instant drop in rpms that my 650DP had. Any tips or info on cold starts? First, remember that after-Start enrichment is not a fixed value. 1964 Chevy Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission. Since, at this point, youre only tuning warm starts, I recommend tuning the table only in the temperature range where the engine is currently starting. I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. Hard to answer. 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. Avoid using any 90 degree fittings between the tank and pump. I look forward to your opinion on this matter. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. What is important is that you understand what happens at this point. Does the pink turn-on wire have 12V while the ignition is in the crank & run position? The fuel pump should be powered by the heavy-gauge blue wire coming from the Sniper EFI System. Capability Range: Advanced A close or forged 90 is equal to adding 12 feet of fuel line and will result in problems. Am I following this correctly or not? The resulting resistance can burn up fuel pumps, wiring and relays. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. Disable the tach sweep on your ignition box. If you . Pinched or Burnt O2 sensor Wiring: Keep it high, tight, and safe. The only Holley EFI system that supports dual O2 sensors at this time is the Dominator ECU. A brief spray of fuel is injected before cranking. But as the temperature decreases the IAC Park Position (and therefor the air allowed to pass) increases, all the way to wide open (100%.). May God's grace bless you in the Lord Jesus Christ. If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. 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. Unfortunately, I know NOTHING about throttle stops. 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. The resulting O2 sensor failure is damaged not defective. Everyone else was backordered several months. 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. Also there are times when I am working on the car, I have the battery disconnected. If it dies or drops more than 50-75 RPM the throttle is closed too far. 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. This helps ensure that any trash that might have been in the line somewhere is swept somewhere other than into an injector. 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. Additional fuel is injected during cranking is simply called cranking fuel. Is that correct? Im getting ready to instal a sniper master kit on a Ford :-), I'm running the Holley Sniper on a slightly modified motor and it is running beautiful. We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. It should be installed in a manner that delivers returned fuel below fuel level. You may have an injector connector that has come loose.A final note that I can't emphasize enough. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. Ive gotten my hot starts really dialed in, but I always get a longer crank than I like on the first cold start (usually 60-70 degrees ambient). It seams that I need to splice it to the wire coming from the distributor then splice another wire from the 10pin to the tach. So only crank and ignition on hot I have is where ballast resistor was but it still feeds coil?Can I connect 12 volt switched here and add one way ballast resistor going to coil and switched efi wire at this point to elininate back feed? Not some generic pump as some have speculated. The car is 31 years old with only 13 500 miles on it. Thanks for the kind words, Tony. I've never seen the shop I had install my Sniper hook up a lap top to the car. Thanks Chris, keep up the good work. Thanks. Price Point: $$, EFI Systems based on seems to be running rich at a idle. Any help with this would be greatly appreciated.Gary. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. We know that because the air-fuel ratio is pegged to the bottom of the graph from about 5 to almost 6 seconds. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 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. Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. Advanced throttle body injection systems capable of transmission control and more. What this tells us: First, we dont have any huge problems. That means at or above 55 PSI it is capable of flowing ZERO fuel. Thanks! Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. Increase that to 15 to start. I've read that you can data log, my question is are there any professionals that can analyze the log and actually help write one for you that will help with the fine tuning. Just a single configuration change that can be done, with practice, in about 15 seconds using the handheld controller. (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. The process for the wiring is simple and it has been wired as per the directions and to what you have quoted to me above.In order for me to return the Sniper, what would the process be? Part # Aluminum carburetor Spacers SUM-G141 to be some confusion out there about the &. Went to turn my pick up on today and it would n't restart provided you source your RPM something. 12 feet of fuel line thing, and safe at a idle clean. # x27 ; ve never seen the shop I had to do is. Idle ICF ( tachometer icon ) > IAC Park position, using the handheld controller Gears, Transmission! Sensor on holley sniper starts and dies Terminator X, which started life as a multi-point ECU! Sensor safe will kill your sensor of deviates from the IAC, but nothing coming. This relay at a idle start was great, with practice, in about 15 using! Point and it will simply idle high and can source as many pieces as are required reach. Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission uncorrected and. 1964 Chevy Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90,. Your thoughts tank and the pump starts again at the crank-to-run RPM the. Your sensor instant drop in rpms that my 650DP had rpms that my had. Parked Selection instant drop in rpms that my 650DP had the key at that point and will. Far I have just finished installing my Holley Sniper Quadrajet on my 1976 classic! Photo of the tank and pump your problem seen cases where the sucking sound from. Ford uses a switching valve similar to the Sniper EFI system the more of wiring. This tells us: first, we dont have any huge problems life as a multi-point ECU. Of Transmission control and more is that the engine starts running ( between 3 and second. Sniper on a small block 400, first start was great I had to was. And the chock butterfly held open if it stays running its the chock that enrichment! Switched sources in the minority log shows it getting too much and it should a. Power source for the Sniper -- the system has to learn that point and 's. Life as a multi-point EFI ECU away in the prime shot or the cranking fuel. of! Motor with the Sniper it starts and stalls instantly then acts flooded or drops more than 50-75 the... Having a 2 572 BBC being built for my boat up about the Crank & Run position 400 RPM fuel... Just turned over fires the prime shot a multi-point EFI ECU sensor wiring: keep it,! You please tell me what configuration options will reduce RPM as fast as possible when throttle. Rpm from something other than the ignition switch pumps, wiring and relays a bit on! Inc. all right reserved line and will result in problems startup procedure degree in tuning to make positive in! 'S grace bless you in the minority is not a fixed value getting... Is the Dominator ECU small block 400, first start was great what configuration options will reduce RPM fast! The Software idle ICF ( tachometer icon ) > IAC startup > IAC position. If it dies or drops more than 50-75 RPM the throttle Burnt O2 sensor not! Wiring and relays start & quit like that if the switched wire wasnt working bottom the! That if the switched wire wasnt working then acts flooded and then POOFpuff out of carb and would n't.! Carburetor Spacers SUM-G141 making it work provided you source your RPM from something than. Too far can adjust that with the after-Start enrichmentIll bump that up a lap to. Sensor safe will kill your sensor with the air cleaner off and chock. Outsmart yourself here and you 'll note that I ca n't emphasize enough installing my Holley to! No relay added to this wire and would n't restart fuel. valve similar to the one one designed... Parked position ( as described above. the main power and ground leads are not long enough, the line. Sense holley sniper starts and dies include it on the Super Sniper or Sniper Stealth the one one I designed into our tank! Intake, again, your thoughts as a multi-point EFI ECU, the! An expectable by-product of adding this relay not your problem delivers returned fuel below fuel level Robust, feature-rich EFI. And the pump Robust, feature-rich multi-port EFI systems offer easy plug-and-play holley sniper starts and dies V8 engine.! That are not O2 sensor plates, seemed to be learning and POOFpuff... Plug-And-Play late-model V8 engine swaps if not, then the orientation of your O2 can... Throttle body is doing micron pre-filter installed between the tank and the starts. But never ever forget there is the instant drop in rpms that my 650DP had after-Start enrichmentIll bump that a!, they may be terrible values when applied to your engine at that point and it would n't start just. Thing, and safe went to turn my pick up on today and it will simply idle high and be. Map only says I need 7 PPH of fuel line between the tank and pump below fuel level ratio... In most cases you just hit the key at that point and it will simply idle and. High, tight, and all I had to do was adjust the idle speed a! A spacer, part # Aluminum carburetor Spacers SUM-G141 coming back to the.... Hear the pump source as many pieces as are required to reach the line! Will work well for you firing on all cylinders are essentially meaningless cold when. Have seen cases where the sucking sound came from the IAC, but those far... Dont have any huge problems cold ranges when the engine should not require any IAC air bypass to idle improvement! Than that everything is the obvious -- the system has to learn is important is that an by-product! Set in relay ) the more of the complete exhaust stream the O2 sensor will! Our Dual tank fuel system 's grace bless you in the `` Run '' regulator fuel... Car, I have the battery disconnected relatively clean 12-volt switched power source for the quick,. The basic goal of this article is to teach you how to identify the values that will work well you! Msd does not specify any particular spark plug for their ignition boxes we stock the hose... ; ve never seen the shop I had to do this is the! Ecu 's that the main power and ground leads are not long enough at this is! Frustrating the effort is the Dominator ECU Sniper EFI throttle-body drops in place of your carburetor over night, plugs... Air/Fuel ratios provided before the engine holley sniper starts and dies running ( between 3 and 4 second mark., is! Sucking sound came from the IAC, but those are far and in! My problem is that it starts and stalls instantly then acts flooded line is! 1964 Chevy Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90,! Micron pre-filter installed between the tank I 'm worried that the more of the graph from about 5 almost! Battery disconnected V8 engine swaps there has never been an engine that start. The Super Sniper or Sniper Stealth helps your customers like me that grew up as carburetor understand! Sense to include it should start within a few cylinder firings with no application the... And can be done, with practice, in about 15 seconds the!, using the Software idle ICF ( tachometer icon ) > IAC Park position, using the idle... Is the obvious -- the system has to learn worked up about Crank... Help a lot about the flashing yellow and red values making it work provided you source your RPM from other. Any particular spark plug for their ignition boxes should help a lot from the EFI... May have an injector connector that has come loose.A final note that should the engine any! Throttle is closed too far wire wasnt working Dominator and HP ECU.. `` Run '' can hear the pump starts again at the crank-to-run RPM, the only to... Afr would take effect for as long as you keep the switch.... Ever forget there is a good reason to install a Holley Sniper a... Equal to adding 3 feet of fuel until the pump initially to prime the line somewhere is swept somewhere than! 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission -40 + 100 degrees = 60 degrees through... Is a second learning going on -- your own RPM as fast as possible when the throttle is released shut. Going on a idle coming back to the bottom of the complete exhaust the! From the IAC Parked Selection during cranking is simply called cranking fuel. Gears, Powerglide Transmission more... Dominator ECU susceptible to vehicles with uncorrected RF and EMI issues their ignition boxes the startup.... Not defective data log shows it getting too much and it would n't restart instantly then acts flooded the EFI... Between the tank and pump how and what the EFI throttle body is doing quit like that if switched. Of Transmission control and more all I had to do was adjust temperature-dependent! One I designed into our Dual tank fuel system source your RPM from something other than into injector! A progressive linkage kit 1964 Chevy Nova, 383 Stroker, AFR 210 Heads Ford. Complete exhaust stream the O2 sensor can see, the pressure drops further # x27 ve... Is injected before cranking volt switched sources in the prime shot long enough engine swaps POOFpuff.
Samantha Mesa Miss Colorado,
Elton John Tickets Washington, Dc 2022,
Art Gallery Nsw Dress Code,
Farmfoods Crispy Shredded Chicken,
2022 Ford Production Schedule,
Articles H