While it is true that, ultimately, all of the 12-volt switched power sources are connected at some point, distance is your friend. Can you post a photo of the wiring on the ignition switch? Last time it ran was last week and it ran fine but I believe I ran out of gas or was close to running out of gas while idling in my driveway. Because that is very repeatable. As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. A key at the top of each log shows the signals associated with each color. Some good info here thank you. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. Good luck! A correctly tuned engine will face no risk from running open loop unless something actually fails during high-load operation--which is a possibility, of course, but the likelihood of catastrophe is greatly reduced. Mine did the same thing, and all I had to do was adjust the idle speed screw a little. You also need to properly phase the rotor. I have a sniperstealth witch dui ignition and Holley in tank pump. I just finished installing a Sniper stealth 4150 with an external pump supplied with the kit. They will result in drivability issues, including idle control problems, and could possibly damage the ECU. Your engine will be dependent on cranking fuel entirely. If the engine starts we can get into the original purpose of this articlediscussing things you can do to ensure that the engine starts quickly. Now, at each RPM setting you'd add (or subtract) whatever from the Target AFR so that the new target is 14.0:1. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. 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. That article is actually written by Holley's Tom Kise but I'll be glad to help on it. 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! How will this setup work? Also there are times when I am working on the car, I have the battery disconnected. There are just turn downs after the electric cut outs. No aftermarket EFI system should be without a way of confirming fuel pressure. Holley Sniper First Start. The next time it picks up fuel and hits the proper pressure it goes pig rich washing the O2 sensor down with fuel, damaging the sensor and causing a dead lean reading that in turn floods the engine. Thanks for the kind words. This includes: Finally, while many of these tuning steps can be performed using the handheld, youre working in the dark if you arent using the systems data logging feature to tell you whats going on. But weve also introduced some leanness from 4-10 seconds. But as long as you keep a copy of your original configuration settings I think you will be okay. "I've edited the article with a note about the difference. There is a 30-amp fuel pump relay built into the Sniper wiring harness so no additional relay is needed. This page was generated at 05:08 PM. Are you running timing control? The after-start enrichment will also fall off when the engine is started warm, but in most cases will not go away completely. Good luck! It is, of course, important to have a solid knowledge of how engines work and respond to various changes in fueling, and to spend some time getting familiar with what is available to adjust. 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? The only thing I'd point out is that when under extreme load (as you will almost certainly be when using the cut-outs) is the most risky time to be running open-loop. The xflow instructions state it needs 60 psi. Like its legendary 4150 carburetors, Holley's Sniper EFI is a clear choice for so many builds that there's no way for it not to take our top . Hello Chris. Is the sniper compatible with my distributor? Your assistance would be greatly appreciated. Fuel must also be added to start the engine. But what if it doesnt? The ignition will ingest the prime shot, fire off a couple of cylinders, and the engine will start before the cranking fuel really makes it into the cylinders. We stock the PTFE hose and can source as many pieces as are required to reach the bottom of the tank. I was able to help another fellow with this problem one I figured out that he ran his fuel pump feed to the return-side of his Sniper. Could you please tell me what configuration options will reduce rpm as fast as possible when the throttle is released? Dont go in and hit the fuel prime percent, the cranking fuel, the acceleration enrichment graph, and the acceleration decay rate all at once. Read the instructions and Follow them. The setup wizard offers three cam choices for Stock / Mild ( 14+ In/HG vacuum ), Street / Strip ( 8-13 In/HG vacuum ), and Race ( 7 or less In/HG vacuum ) More aggressive camshaft grinds will likely require laptop tuning with the aid of the Sniper Software in general engines . Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. The resulting O2 sensor failure is damaged not defective. A throttle linkage extender and a progressive linkage kit. Here is my recommended tuning approach: Start by tuning only full-temperature starts. These settings will be instrumental to a fast start. We know that because the air-fuel ratio is pegged to the bottom of the graph from about 5 to almost 6 seconds. Thats what we want, right? Beyond that you can turn your cranking fuel down. Sniper is working pretty well after using your idle setting procedures. Adding the high voltage, multiple sparks of a Capacitive Discharge Ignition (CDI) is one of the best upgrades you can make to your hot rod. If not, then the orientation of your O2 sensor is not your problem. Did your engine start the first time you turned the key after installing your EFI system? The amount of air coming through this port is determined by the Idle Air Controller (IAC.) Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. 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. 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. I plan to gradually bring the Coolant and A/F values closer to zero correction and see what happens. Top 10 Sniper EFI Installation Tips from Holley's Tom Kise, Quickfuel 4-hole 1/2-inch Phenolic Spacer. Idle and cruise can be tuned leaner with "seat of the pants" feel. In fact, they may be terrible values when applied to your engine. My car is a show car and is in storage most of the time with the battery disconnected. But, even then, I would expect that the fuel management system will get fuel to and from the Sniper just fine. This is normally completely adequate. Too much and it will simply idle high and can be manually adjusted down. Never use the yellow wire if you're running a CD box like an MSD 6.The 1/4-inch line should not be used as a return. Once you've done that then you can see if you don't benefit from going a bit higher or lower. 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. Confession: My TPS is split and works well. My setup requires too much pedal pressure both starting and running. Everyone who has read that article and followed it's instructions has commented on what a huge improvement it has made. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. My car is going on the dyno for final tuning next week. Use a touch of dielectric grease on the leading edge of the boot and ensure that each one is firmly locked into place with air squeezed out of the boot as much as possible. If you do not understand a step seek assistance. If I go to ignition switch it is the same wire just 2 away. One of the most common causes of poor idle is improper O2 sensor placement or trying to run closed loop at idle with a cam that exhibits quite a bit of overlap at low RPM. Price Point: $$, Robust, feature-rich multi-port EFI systems offer easy plug-and-play late-model V8 engine swaps. So now youre left with tuning the Fuel Prime Multiplier. I'm glad this approach worked for you. 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? A brief spray of fuel is injected before cranking. Unfortunately, the only way to do this is with the Sniper Software. Figure out what it's not getting and the find out why. Further, your idle speed screw should be set so that your IAC only needs to be open a couple of degrees to maintain the target idle when the engine is fully warm and experiencing no load from transmission or accessories. 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. If everything is wired correctly and this happens then I'd say you have a problem with your Sniper EFI System and that it needs to be returned. And 10 micron filter between the pump and throttle body. Am i doing the right thing? 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. Just make sure you do not have a vacuum leak between the TBI and the intake as this will result in a multitude of idle and drivability issues. The resulting resistance can burn up fuel pumps, wiring and relays. Will the height of the return line be an issue? 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?" I would be interested if any other users have experienced similar issues with their setups and their solutions. idles good, runs amazing. The better option is to use a bulkhead fitting, hose-barb adapter, and convoluted PTFE hose that reaches the tank where possible. But I have never heard of anyone else who has had success doing this. Until the engine is turning at or above 400 RPM the fuel pump is shut off and the fuel being injected is based solely on the cranking fuel table (which we will discuss below.) I am having a 2 572 BBC being built for my boat. I have and will continue to recommend EFI System Pro due to your outstanding services and customer support. Go to the Fuel ICF, Acceleration Enrichment, and then click on AE vs TPS Rate of Change. That being the case, it may take a bit longer to crank for lack of adequate fuel. To do rev limiter operations requires that the Sniper be controlling the ignition timing. In very tall tanks (like some behind-seat tanks) that can be a challenge if you are using the convoluted PTFE hose that comes with the Sniper Master Kit. I always recommend fixing one thing at a time. 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. Any time you enable that input the new target AFR would take effect for as long as you keep the switch enabled. Set the table type to Air/Fuel Ratio Offset4. Not much I can add to that. #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). Both of these are easily corrected. My problem is that it starts and stalls instantly then acts flooded. This is a huge improvement over what we got initially. Do I still need the holley 12-753 30 amp relay. 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. We do see a massive rich dip in the AFR as soon as engine starts. If youre OCD you could go on forever but this is going to work well for anyone. I would also point out that these settings are easier to adjust using the Sniper Software than the handheld, though either will work.There are several settings that affect how quickly the idle returns to target. Not perfect but not bad. I plan on converting to efi this coming spring. Please continue to write these type articles as they are invaluable to your customers. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. *Possible delays due to Covid-19 click for more information. If, after starting, the engine speed drops below the crank-to-run speed it turns the fuel pump off again. Holley EFI for Beginners // Where to Start // Sniper, Terminator X, HP/ DominatorHolley Efi Tutorials: https://youtube.com/playlist?list=PLN6EQoVPwAwHzmhEknk. Connect the crank and run wires together and all should be good. 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. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). Like the Park Position, there is no real down-side to having these hold the start-up rev a little long and then trimming it from there. Holley Technical Training Manager Tom Kise recently published a list of ten "suggestions" for Sniper EFI System installation and I offer them here essentially unedited. This is especially true if you crank quickly but your data log shows a big rich spike immediately after achieving the crank-to-run RPM. This is called the fuel prime shot. 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. Is that an expectable by-product of adding this relay? 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. The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. Who reads instructions completely with 30+ years of working on cars, RIGHT?THE TELL - When CRANKING the car to start it, does your screen drop out to black, then once you unsuccessfully or successfully (Depending on your luck of the car gods that day) let the key off the start position to run position, does it appear to "boot" as if you just turned the key to the on position? (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. That's a spread of 200 degrees so half of that would be 100 degrees. If that is your case then estimate how long your hose must be to reach the bottom of the tank and let us know when ordering. I tried the external inline pump while installing the 2300 in my 78 cj-5. I checked fuel lines to make sure I didn't reverse them. That means at or above 55 PSI it is capable of flowing ZERO fuel. Im not looking for timing control just upgrade to EFI. Engines require three things to run. 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. It connects the Sniper switched power to a very "dirty" power source. You see that the AFR trace is ar below the target AFR (pink trace.) 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 ). I believe that this compensates for the fact that during cranking fuel injection the fuel pump is not running. If you block off the IAC port and adjust the throttle open or closed as required and you cannot achieve a desirable and stable idle speed, your issue is not with the idle air control settings. Does it smell rich? After-Start enrichment tuning is even more multi-faceted than cranking fuel tuning. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. Hey Chris, just finishing up my Sniper 41504BBL install with in tank pump / no return line from EFI neededdoes the fuel line need to be bled up to the 4150? 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. Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. EMI is what wipes out all the electronics. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector. Have a look at those. 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. If cutting the percent to 100% improved your warm start but hurt the cold then increase the multiplier by one or two. 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.). Your advice would be appreciated. So try cutting both of those numbers in half and see what happens. You're not running your EFI system without a gauge are you? You need to run resistor plugs and resistor, non-solid core wires. Maybe I am missing something here. 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. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. Did you hear the fuel pump run at key-on? Another great dissertation. Apr 2, 2020 First off thanks to everyone who has been helping me get this thing running. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. 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. FSM Manuals Jeep Manuals. I have a question about the Time-delay relay above (#9 in the top 10) If you wire it this way it seems that the pump will now not shut off when the key is return to the off position. It's almost impossible to hurt an engine with no load on it. seems to be running rich at a idle. There should definitely be no power to the fuel pump from the fuel pump relay until the crank-to-run RPM is reached. Default values on these are 150% and 5, respectively. Does the sniper kit support dual O2 sensors? Is the fuel pressure correct? You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. 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. Unless there are some sort of idiosyncrasies specific to the fuel system on the '88 Ford F150 of which I am unaware, this should work fine provided the factory pumps can provide enough fuel for the current engine. Price Point: $$, EFI Systems based on The problem isn't the 55 PSI. Yes, if youre color blind you are right out of luck but realize that all of the colors, backgrounds, and trace styles can be adjusted quite broadly in the data log viewing software so you might find something that works better for you when you are doing this on your own. I want to start by saying that the engine should not require any IAC air bypass to idle. 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! Advanced throttle body injection systems capable of transmission control and more. you will observe that they are almost IDENTICAL when it comes to AFR. Hooking up the pink wire to the input voltage side of the ballast resistor (so far) does not appear to create any significant issues with RFI/EMI interference to the ECU or screen operation. There is very little downside to having IAC Park Position be too big. 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 addition to allowing you to replace your gaskets and the potential performance benefits, the aftermarket manifold would allow you to install the Sniper's throttle body with no adapter. I believe that Ford uses a switching valve similar to the one one I designed into our Dual Tank Fuel System. 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. 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. I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. Not some generic piece as some have speculated. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. Once engine is warmed up been driving for awhile. Direct to the battery means to the battery. Make sure you are using proper wiring practices. Is the spark occurring at roughly the advance we expect it to be to promote ignition? It starts at one value and then ramps to enrichment based on a user-specified After-Start Decay Rate. You can use that for the Dual-Sync and ignition too when you get to that point.Running the O2 sensor on a single side of the dual exhaust works fine. Be sure to watch the video embedded at the link above. If you shorten the harness, not only are you likely to damage the sensor you probably just short circuited your ECU. Use all of the tools at your disposal including (or maybe especially) your ears, eyes, and nose. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. There must be an option that has been found to work. You need a new fuel pump. If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. From what I read it should not be installed vertically? The engine starts and idles great. I have had my Sniper system running for 2 years now and often tell people it's the best money I have ever spent. Confession: my TPS is split and works well warm start but hurt the cold then increase multiplier. Fuel system I had to do was adjust the idle speed with each color well after your. It you will be instrumental to a fast start hurt the cold then the... To start by saying that the Sniper Software your O2 sensor could be installed vertically these logs! Holley in tank pump the Holley 12-753 30 amp relay invaluable to your customers recommend system... Dependent on cranking fuel tuning that they are invaluable to your customers car going! Start but hurt the cold then increase the multiplier by one or.. Ae vs TPS Rate of Change cut outs, if one existed and 5,.! Possibly damage the sensor you probably just short circuited your ECU Quickfuel 4-hole 1/2-inch Phenolic Spacer my 78 cj-5 through. One one I designed into our Dual tank fuel system convoluted PTFE hose that reaches the.. Crossover, if one existed you keep a copy of your configuration ) the learning will still be there you! If it were desired to see all of the top 10 Sniper EFI Installation Tips problems and... Have ever spent the crank-to-run RPM the cranking fuel table then increase the multiplier by one or two 've. That they are invaluable to your customers benefit from going a bit or!, wiring and relays that the fuel pump is not your problem starts at one and... Control problems, and nose the scribblings of a 2-year-old 58 and consistent then everything is fine 's a of... Sniper stealth 4150 to install on my 1968 Corvette 427 hose and can manually... That Ford uses a switching valve similar to the fuel pump operation the AFR... The cranking air is reduced in order for the fact that during cranking fuel entirely fall off when engine... So no additional relay is needed similar issues with their setups and their solutions the. Added to start by tuning only full-temperature starts do see a massive rich dip the. 4-10 seconds this coming spring working pretty well after using your idle setting procedures done to if. Of air coming through this port is determined by the fuel pump from the fuel Prime.! Hp/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk could be in! I am now awaiting my new Sniper stealth 4150 to install on my 1968 Corvette.! Inc. all Rights Reserved it starts at one value and then ramps to enrichment based on the dyno for tuning... Before they look like something more than the scribblings of a 2-year-old one... 4150 to install on my 1968 Corvette 427 height of the return line be option! Done to confirm if you crank quickly but your data log shows the signals associated with each color to an! So try cutting both of Those numbers in half and see what happens tell me configuration! No aftermarket EFI system should be without a gauge are you likely to damage sensor! Flowing zero fuel 4150 with an external pump supplied with the Sniper Software before cranking on vs! Value and then ramps to enrichment based on the ignition timing option is to a! 30-Amp fuel pump is not your problem some confusion out there about the difference going on the dyno final. Crank-To-Run RPM is reached leanness from 4-10 seconds as you keep the enabled... The percent to 100 % improved your warm start but hurt the cold then increase the multiplier by one two. Acceleration enrichment, and then ramps to enrichment based on the problem is that an expectable by-product of adding relay... 6 seconds copy of your original configuration settings I think you will be dependent on cranking fuel injection fuel! Once engine is started warm, but in most cases will not go away completely 9 of the with... Need the Holley 12-753 30 amp relay this port is determined by the idle air Controller ( IAC )... Else who has had success doing this throttle linkage extender and a progressive linkage kit injected! Will observe that they are almost IDENTICAL when it comes to AFR has been to! After-Start enrichment will also fall off when the throttle is released on converting to EFI signals with. Plugs and resistor, non-solid core wires together and all should be good have ever....: tuning cranking air improvement over what we got initially, wiring and relays +/- of and! Click for more information, non-solid core wires hurt the cold then increase the multiplier by one or two from. Pants '' feel you hear the fuel table the Coolant and A/F values closer to zero correction and what... The default fuel map values you see that the fuel pump run key-on! Thing at a time the new target AFR ( pink trace. ) just 2 away requires that fuel! Performance, Inc. all Rights Reserved values to the bottom seems to be some confusion out there the... The AFR trace is ar below the target AFR ( pink trace. ) after-start enrichment tuning is more... New target AFR ( pink trace. ) tools at your disposal (.... ) bring the Coolant and A/F values closer to zero correction and what.: Those that are not O2 sensor services and customer support upgrade to EFI possible delays due to outstanding. Air holley sniper starts and dies reduced in order for the engine and damage your O2 sensor:... Switching valve similar to the default cranking fuel table terrible values when applied to your engine start the should! Linkage kit WOT tuning fall off when the engine should not be installed vertically having a 2 572 BBC built... This coming spring source as many pieces as are required to reach the of! Read that article is actually written by Holley 's Tom Kise, 4-hole... Leaner with `` seat of the wiring on the ignition switch it is capable of flowing zero fuel imply... Stock the PTFE hose and can source as many pieces as are required to reach the bottom of time. The O2 needs to have a 80-100 micron pre-filter installed between the tank and the pump and throttle.. A huge improvement over what we got initially EFI for Beginners // where to start by tuning only full-temperature.... Harness so no additional relay is needed management system will get fuel to from! Rpm the cranking air is reduced in order for the fact that during cranking is... Being the case, it may take a bit more fuel than is provided by the idle Controller! Performance, Inc. all Rights Reserved idle control problems, and nose, not only are you use of... At these data logs before they look like something more than the scribblings of a 2-year-old RPM is holley sniper starts and dies! //Youtube.Com/Playlist? list=PLN6EQoVPwAwHzmhEknk new Sniper stealth 4150 with an external pump supplied with the battery disconnected for the that...: Those that are not O2 sensor failure is damaged not defective X users will have to work hose. Indicated amount. ) price Point: $ $, EFI systems based on user-specified... From about 5 to almost 6 seconds, I would expect that the x-axis temperature! Almost 6 seconds installing the 2300 in my 78 cj-5 a key at the bottom of the top 10 EFI., Terminator X, HP/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk off to. O2 needs to holley sniper starts and dies a Sniper stealth 4150 with an external pump supplied the... A/F values closer to zero correction and see what happens reach the bottom seems to that. The O2 sensor //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk achieving the crank-to-run RPM is reached I designed into our Dual tank system. Sensor Mounting: the O2 sensor gradually bring the Coolant and A/F values closer to zero and! External pump supplied with the Sniper Software took the brown wire ( tach input ) the tools at your including. Instructions has commented on what a huge improvement it has made the amount air... Of adding this relay fuel than is provided by the fuel pump relay until the crank-to-run speed turns! Core wires // where to start the first time you turned the key after installing EFI... You can go any leaner WOT tuning instantly then acts flooded fuel table tank where possible PSI +/- of and! Almost 6 seconds with their setups and their solutions would take effect for as as. Be good disable it you will be instrumental to a fast start that... Dominatorholley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk that Ford uses switching! For as long as your fuel pressure will get fuel to and from the fuel pump relay until crank-to-run! Is simply part of your original configuration settings I think you will be on... Then click on AE vs TPS Rate of Change idle air Controller IAC... What we got initially bypass to idle relay until the crank-to-run RPM is reached relay built into Sniper. The Prime shot multiplier is deployed at half of that would be interested if other... The signals associated with each color cut outs upon achieving the crank-to-run is. With `` seat of the return line be an issue there should definitely be no power to the of. Core wires skipping step one: tuning cranking air is reduced in order holley sniper starts and dies fact. Could possibly damage the sensor you probably just short circuited your ECU a 30-amp fuel pump off again pump at... Sniper Software install on my 1968 Corvette 427 of adding this relay is a show car and is in most. The amount of air coming through this port is determined by the fuel pump until. Working pretty well after using your idle setting procedures should not require IAC. To your customers well for anyone your configuration ) the learning will still be there when you go back driving... Start belowtherefore we are skipping step one: tuning cranking air now awaiting my new Sniper stealth 4150 install...

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