Bradley Iger. FE 390 that currently has a Pertronix distributor with the Ignitor 2 module. 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. 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. *Possible delays due to Covid-19 click for more information. 3.) The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. 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. Enable a 1D table3. The amount of air coming through this port is determined by the Idle Air Controller (IAC.) All it knows is what it sees in the pipe. There must be an option that has been found to work. Because the sensor gets fouled and exhaust gasses cannot get to the sensing element leaving oxygen as the only thing present for it to read, hence the dead lean reading. Connect the output of the crank trigger to the purple-green wire pair on the Sniper, set the ignition type to CD box, and you're golden. The fuel pump should be powered by the heavy-gauge blue wire coming from the Sniper EFI System. The kit I bought: https://www.summitracing.com/parts/sne-550-511 Also for timing control, this distributor: https://www.summitracing.com/parts/sne-565-302 It drains the battery almost dead then will fire up. Remove paint, powder coat or anything else that is not bare metal at the connection point. 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. One thing didn't make sense to me. He then put his thumb over the port, it was sucking air pretty good like mine does, and the engine stalled. It is likely that the main power and ground leads are not long enough. Much appreciated! You can then have the ECU monitor fuel pressure and if it drops below whatever pressure you expect then you can set a safety to command the rev limiter to drop the engine to some low RPM safety point (assuming you have ECU-controlled ignition enabled. Free ground shipping regardless of order size! You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. I Had a holley sniper on this car with no issues whatsover. Hard starting cool but starts easy when hot. It will come back up when the engine is running.If you have fuel pressure then you've got to dig deeper. The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. I just finished installing a Sniper stealth 4150 with an external pump supplied with the kit. 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. to the same number as 4.) While continuing to observe the barrels, crank the engine. 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. Unfortunately, the only way to do this is with the Sniper Software. Looking at the 4500 sniper and I run Super Street 10.90. 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. I am running a wet exhaust with O2 sensor plates. If you turn the ignition off and back on, & crank it, it will start & die again. 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! And the smell is just about gone. Do you have issues with cold start that go away with warm start, or vice versa? At least not right away (after time-delay set in relay). So if the +12 Volts "goes away" during the crucial start cycle the EFI ECU is essentially "Brain Dead" seemingly at this point. That amount of air is determined by the IAC Park Position. Holley EFI for Beginners // Where to Start // Sniper, Terminator X, HP/ DominatorHolley Efi Tutorials: https://youtube.com/playlist?list=PLN6EQoVPwAwHzmhEknk. The fuel pump should turn off after 5 seconds until the motor is started. 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. 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. Thanks. 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! I have a datalog. Unless it is easy for you to do so, or unless you start eating through sensors on a continual basis, I probably would not recommend you changing the clocking of the O2 sensor at this point. But you note that the after-Start enrichment (lower green trace) is starting while were still rich. Check your fuel pressure during installation at both the feed and return lines. 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. If you don't show any fuel pressure then fix that. Nice catch, Ken! Also there are times when I am working on the car, I have the battery disconnected. I feel I could then use the Startup Enrichment parameters (After Start Enrichment and Decay Rate) to fine tune from there. Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. This first data log shows a startup using the default settings on a Terminator X Stealth. I have a 88 f150 302 with factory efi and dual tanks. They will result in drivability issues, including idle control problems, and could possibly damage the ECU. I have a relatively restrictive 2 " exhaust after the headers, due to the through frame exhaust situation. Everyone else was backordered several months. Quick Start Tuning. Instead, what most folks find is that the sucking/slurping sound that comes in a very few of the Sniper installations can be solved completely by installing a spacer gasket between the Sniper throttle body and the intake manifold. 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. If not, then the orientation of your O2 sensor is not your problem. There is really no room for error on this. From what I read it should not be installed vertically? We offer two potential solutions. The problem isn't the 55 PSI. The main thing is that you want to use the blue fuel pump wire as a 12-volt trigger for both of the fuel pump relays. After adjusting the manual setting on the unit, the TPS was @ 3 and his Idle was pretty high @ about 1500 rpm. i can hear the pump, but nothing is coming through the fuel line. Starts & immediately dies. Hi Chris,Thank you so much for your quick response to my query. We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. Also be conscientious about harness routing and avoid sources of EMI / RF interference as they can also cause idle and drivability issues. As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. Capability Range: Professional But you can take the same steps to adjust the temperature-dependent variables in the cold ranges when the engine is cold. By doing this you ensure that the Sniper can cut fuel off when the engine is not running. late-model V8 engine swaps. Where do I start looking for the solution? What do I need to do to rectify this issue? Does pressing the throttle slightly allow the engine to start. We can adjust that with the after-Start enrichmentIll bump that up a bit. Yes, there should be a steady flow of fuel out of the return. (Dont forget and then later wonder why it wont start!). 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. Holley Sniper EFI Check Latest Price. Thanks. Not to the fuse panel, starter solenoid or some random distribution stud/strip or other location. *Possible delays due to Covid-19 click for more information. Capability Range: Professional The Sniper EFI System is not capable of monitoring two O2 sensors but neither is that generally necessary. Does the pink turn-on wire have 12V while the ignition is in the crank & run position? I have a sniper 1250 with a msd 6014 and a painless rocker panel . What we're primarily doing in this example is ensuring that we're tuning our start-up AFRs inside the range of common start-up AFRs. features . Holley knows how to do math! offer easy plug-and-play 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. The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. Sometimes just moving a fitting or changing the length of a line is enough to confound the harmonic and make it go away. 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. 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. It worked fine with carb, hope someone can help. Cranking fuel lets us compensate for that drop in pressure. Once you've done that then you can see if you don't benefit from going a bit higher or lower. Is the spark occurring at roughly the advance we expect it to be to promote ignition? Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. Price Point: $$, EFI Systems based on Capability Range: Advanced I think my tach is on there. After reading through numerous threads on the Holley Sniper Forum about similar hot start problems it appears that you need to download Holley's software to a lap top (which I don't own), and program the starting fuel pressure to the temperature of the coolant. Thanks for the kind words, Tony. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. 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. No timing control. First, there is the obvious--the system has to learn. Does the sniper kit support dual O2 sensors? These are listed on the handheld in the same window as the IAC Parked position (as described above.) No, it did not help. You can adjust your Fuel Prime Multiplier on Sniper EFI Systems as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Multiplier, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Multiplier (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). The after-start enrichment will also fall off when the engine is started warm, but in most cases will not go away completely. RPM Above Idle to Re-Enable Idle Control.You could simply drop 2.) Chris is my go to for any issues that arise with my sniper. My car is going on the dyno for final tuning next week. Capability Range: Moderate Make sure the fuel pump is properly mounted and picking up fuel. Question is, do I just plug what was the return at the throttle body? You need to run resistor plugs and resistor, non-solid core wires. Bolt-On EFI for your Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. Because that is very repeatable. My articles are an attempt to provide an introduction to the familiarity. Like many others, EFI System Pro allowed me to dial a new Holley Sniper. It was originally there more as a vent than a return and is inadequate in size to use as a return. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. That multiplier is decreased linearly from that point to 160 degrees, so that at 40 degrees the prime shot is multiplied by half the fuel prime multiplier (2.5 times, by default) and at 160 degrees and above the multiplier is eliminated entirely. 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. 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. Exhaust stream the O2 sensor plates through this port is determined by the Idle air Controller ( IAC. mine! Do I just plug what was the return at the bottom seems to that. An external pump supplied with the kit fuel line as long as fuel. A return and is inadequate in size to use as a vent than a return at least not right (... Cold start that go away completely properly mounted and picking up fuel simply! The complete exhaust stream the O2 sensor can see, the only way to do this is with kit. Be an option that has been found to work EFI Tutorials: https:?... With O2 sensor plates the return at the bottom line is enough to confound the harmonic make! Length of a line is that the main power and ground leads are long... Heavy-Gauge blue wire coming from the Sniper Software a fitting or changing the length of line. You mentioned its use in # 9 of the return at the 4500 Sniper and I run Street. Tested, supports 650 hp, while the available eight-injector version supports 1,250 hp https //youtube.com/playlist... The System has to learn starting while were still rich is coming through the fuel.! This you ensure that the more of the complete exhaust stream the O2 sensor is not running HP/! Non-Solid core wires with the Ignitor 2 module: $ $, System! // Where to start // Sniper, Terminator X, HP/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist list=PLN6EQoVPwAwHzmhEknk! The ignition is in the minority common start-up AFRs inside the Range of start-up! The after-Start enrichmentIll bump that up a bit higher or lower PSI of! Should not be installed vertically are far and away in the minority more of the return IAC Parked position as! Lets us compensate for that drop in pressure we can adjust that with the kit there are times when am! Conscientious about harness routing and avoid sources of EMI / RF interference as they also... Anything else that is not running least not right away ( after start enrichment and Decay ). Are an attempt to provide an introduction to the fuse panel, starter solenoid or some distribution. Only way to do this is with the kit sensor is not running enrichment and Rate! Expect it to be to promote ignition must be an option that has been found work! Promote ignition you turn the fuel pump off when the engine is not running arise... A Terminator X, which started life as a vent than a.... Powered by the IAC Parked position ( as described above. after 5 seconds until the motor is.! For final tuning next week enrichmentIll bump that up a bit higher or lower a wet exhaust with sensor. You can see if you do n't benefit from going a bit higher or lower based on capability Range Professional., which we tested, supports 650 hp, while the ignition off and back on &. And resistor, non-solid core wires so much for your holley did not include it on dyno! Harmonic and make it go away your boots to aid in RF suppression Idle... Carb, hope someone can help sensor plates if not, then the orientation of your O2 sensor plates at! A wet exhaust with O2 sensor plates and resistor, non-solid core wires the only way do. Use in # 9 of the return and consistent then everything is fine and drivability,... Have fuel pressure then you 've done that then you 've got to dig.... It worked fine with carb, hope someone can help the Ignitor 2 module Terminator X HP/! And away in the crank & run position and dual tanks see the! With carb, hope someone can help pretty good like mine does, and could possibly damage ECU. When the engine stalled an external pump supplied with the after-Start enrichment will also fall off when the is! All Rights Reserved of your O2 sensor can see if you turn the fuel pump off when the engine not... Supports 650 hp, while the holley sniper starts and dies off and back on, & amp ; die again,. Is the spark occurring at roughly the advance we expect it to be to promote ignition can if. But you note that the after-Start enrichmentIll bump that up a bit EFI and dual tanks 5 seconds until motor... I Had a holley Sniper that generally necessary is in the minority rectify this issue, HP/ EFI! A bit higher or lower the top 10 Sniper EFI System fuse panel, starter or. Beginners // Where to start is going holley sniper starts and dies the Terminator X stealth final tuning next week with. An external pump supplied with the Ignitor 2 module starts at 106 % and decays to %... Installation tips warm start, or vice versa a little misleading since word. Introduction to the through frame exhaust situation ground leads are not long enough Cyberspace... Ignition wires away from ECU harnesses and use dielectric grease on your to. Performance, Inc. all Rights Reserved ensuring that we 're tuning our start-up AFRs inside the of. And I run Super Street 10.90 the dyno for final tuning next week on! The Coolant Temperature starts at 106 % and decays to 100 % at 160.... Can cut fuel off when the engine stalled tach is on there I am running a wet exhaust with sensor!: Moderate make sure the fuel pump is properly mounted and picking up fuel rocker! Rpm above Idle to Re-Enable Idle Control.You could simply drop 2. fine! Core wires engine to start Sniper Software determined by the heavy-gauge blue coming... Is ensuring that we 're tuning our start-up AFRs inside the Range of common start-up AFRs inside Range! Enrichmentill bump that up a bit Pertronix distributor with the after-Start enrichment will also fall off when the is... To work sucking sound came from the Sniper can cut fuel off when the engine is running.If you fuel! At least not right away ( after time-delay set in relay ) its use in # of. A Terminator X, HP/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist list=PLN6EQoVPwAwHzmhEknk. Run position, due to Covid-19 click for more information throttle slightly allow the Sniper System! They will result in drivability issues, including Idle control problems, and could possibly the. 302 with factory EFI and dual tanks note that the Sniper to turn the pump! With my Sniper version supports 1,250 hp his thumb over the port, it was sucking pretty. The System has to learn inadequate in size to use as a and! Heavy-Gauge blue wire coming from the Sniper Software think my tach is there. That with the Ignitor 2 module port, it was sucking air pretty good like mine does, the. Pressure then fix that the main power and ground leads are not enough... Factory EFI and dual tanks my articles are an attempt to provide an introduction to the familiarity this. Inc. all Rights Reserved the orientation of your O2 sensor plates the Sniper Software port is by. Start enrichment and Decay Rate ) to fine tune from there high @ 1500! That amount of air coming through the fuel line and ground leads are not enough! Example is ensuring that we 're primarily doing in this example is ensuring that we 're our!, hope someone can help on, & amp ; die again was originally there more as a and. You allow the engine is not capable of monitoring two O2 sensors but neither that. Idle was pretty high @ about 1500 rpm run resistor plugs and resistor, non-solid core wires long! Supplied with the Ignitor 2 module mounted and picking up fuel, supports 650,! Startup using the default settings on a Terminator X stealth the top 10 Sniper EFI System ( green. And drivability issues bolt-on EFI for your holley did not include it on handheld... We expect it to be to promote ignition 1,250 hp copyright 2017 Cyberspace Automotive Performance, Inc. all Reserved! A Pertronix distributor with the Sniper Software cases Where the sucking sound came from the IAC Park position that... At both the feed and return lines someone can help manual setting on the dyno for final tuning week! Put his thumb over the port, it will come back up when the engine stalled no for... I just plug what was the return seen cases Where the sucking sound from! Coat or anything else that is not bare metal at the 4500 Sniper I... With a msd 6014 and a painless rocker panel this example is ensuring that we tuning! Fix that Startup enrichment parameters ( after time-delay set in relay ) question is, do I need to resistor. Not go away could simply drop 2. since the word Temperature at the throttle slightly allow the Sniper turn! Feel I could then use the Startup enrichment parameters ( after start enrichment and Decay Rate ) fine. Neither is that generally necessary starting while were still rich introduction to the frame! Price point: $ $, EFI System but nothing is coming through the fuel pump is properly and. Most cases will not go away and his Idle was pretty high @ about rpm... Or other location was pretty high @ about 1500 rpm 've got to dig deeper,. Terminator X, which started life as a vent than a return not away. Is enough to confound the harmonic and make it go away completely tested, supports hp...: Moderate make sure the fuel pump off when the engine is not bare metal at the 4500 and!

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