I tried the external inline pump while installing the 2300 in my 78 cj-5. Capability Range: Advanced This is why most OEM EFI pumps are in the tank. If that works then try halving them again. The default for these systems is 400 RPM. I just finished installing a Sniper stealth 4150 with an external pump supplied with the kit. A throttle linkage extender and a progressive linkage kit. Yes, I have seen cases where the sucking sound came from the IAC, but those are far and away in the minority. Stay up to date with the latest releases, events, promotions and more. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. Did your engine start the first time you turned the key after installing your EFI system? Granted, car was not on but still seemed like a lot of fuel to be returning. The only Holley EFI system that supports dual O2 sensors at this time is the Dominator ECU. 2. Push the fuel prime percentage back up to 100% and bring your cranking fuel down (as we do in the example below.). In my experience startup fuel tends to be too much. I've had this throttle body for a few months, haven't put 10 miles on it since I installed it. 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. Installed my Sniper, went through the startup procedure. You just have to go one direction and see if things improve or not. It will add fuel based on the temperature and won't affect your warm start.If you have another EFI system (or if the multiplier isn't giving you the results you want) then you'll have to play with the cranking fuel table, but ONLY do so in the temperature range where you're getting feedback from the data log. If you do not understand a step seek assistance. 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 have it disconnected to flush any debris out.Thank you. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. 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. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) Thanks. While it is true that, ultimately, all of the 12-volt switched power sources are connected at some point, distance is your friend. 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. MSD recommends non resistor plugs. 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. You have that where you want it. First, it is fake news that EFI doesn't like big cams. I believe that Ford uses a switching valve similar to the one one I designed into our Dual Tank Fuel System. This first data log shows a startup using the default settings on a Terminator X Stealth. My setup requires too much pedal pressure both starting and running. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? 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. Sniper Owners: Once youve tuned your fuel prime on warm starts you can look forward to judging the efficacy of your fuel prime setting on your next cold engine start. Not bad but maybe we can improve that. I read where you need to disable the rev limit verification feature on a 6425 MSD box but was wondering if it's the same for my 6014 LS box? 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. The strong exhaust smell during this time indicated a very rich condition. Ill check the coil and see if anything else is attached. 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? I make a lot better electrician than mechanic but have built cars all my life. (If the Sniper does not get a RPM signal, it will not inject fuel.). If it dies or drops more than 50-75 RPM the throttle is closed too far. Get a gauge. Tuning the cold start uses the same exact techniques as tuning the warm start, so if you were successful there you don't have to do anything new. Feed pressure should be knocking on 58 PSI and the return should ideally be zero, if the feed pressure is not correct, or if the return line pressure is greater than 4-5 PSI find and correct the restriction before proceeding. But I can tell you that it is possible to use a switched input to activate a 1-Dimensional Advanced Table to do an air-fuel ratio offset that would allow you to set your target AFR to 14:1. The whole purpose of this article is to teach you how to identify the values that will work well for you. Just ran across this thread after a car I had in that would start good, then die after a second or two when hot. If youre OCD you could go on forever but this is going to work well for anyone. This page was generated at 05:08 PM. Can I run the pink ignition wire to the coil positive? At this point you should be able to start the engine consistently though the cranking times may be longer than you want. I suspect that your ignition sense wire from your Holley system is connected to the crank wire that is hot during cranking and shuts off after you let up on the key. Stay after it--you'll make it happen! What this tells us: First, we dont have any huge problems. Recognize that the exercise above tuned our variables that are not affected by temperature (like fuel prime) and the temperature-dependent variablesbut only in the warm range. I would point out that one of the key benefits of buying your EFI system from EFI System Pro is that you get free assistance interpreting data logs and updating configuration files. Quick to respond and very knowledgeable. I've never seen the shop I had install my Sniper hook up a lap top to the car. Also check your cranking voltage if it starts hard. Once you've done that then you can see if you don't benefit from going a bit higher or lower. 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. My problem is that it starts and stalls instantly then acts flooded. But you note that the after-Start enrichment (lower green trace) is starting while were still rich. Idle and cruise can be tuned leaner with "seat of the pants" feel. If I do that right (about 500 ms should do it) then the after-Start enrichment will not come in while were still in that rich region coming right off initial fire-up. I feel I could then use the Startup Enrichment parameters (After Start Enrichment and Decay Rate) to fine tune from there. Don't hesitate to call, nights and weekends included.). That's where I would start. If I start the car cool and dont touch the gas the engine will crank and crank and never fire. You will use the yellow wire to the tach output on the distributor (where the tachometer was formerly connected.) Capability Range: Moderate More on that later. You have answered all of my emails, given great technical advice, and have also given the best product support Ive ever had. When a wide band sensor is (DAMAGED) it almost always reads dead lean. This is normally completely adequate. Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. Troubleshooting - engine starts and stalls Troubleshooting - engine starts and stalls Bill Tichenor 12/02/2009 10 min read Share Carburetor Installation and Tuning Video carburetor tuning and adjustments video Footage taken from Holley Carburetor Installation & Tuning DVD author Bill Tichenor 358 Posts An Article About FAIL!! You see that the AFR trace is ar below the target AFR (pink trace.) THAT'S A PROBLEM!The Holley install manual CLEARLY STATES to make sure whatever switched 12 volt source you connect the PINK WIRE to, that it MAINTAINS VOLTAGE WHILE CRANKING THE CAR!! If it does not idle down your throttle is open too far or you have a vacuum leak. Could be, I initially had mine not wired to a 12V source while cranking, and it did the same thing yours is doing. Find a lower price anywhere and we'll beat it by 5%! There should be 1 AWG or larger ground strap going direct from the battery to the engine. Tune the cranking fuel in the following locations: Using the Handheld Tuning > Advanced > Advanced Fuel > Cranking Fuel, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Cranking Fuel. 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. Runs, then dies. Make sure you are using proper wiring practices. 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?" Extending wires with too small of a wire gauge will also result in the same damage. Holley Sniper First Start. My solution was to significantly reduce both the Coolant Temperature Enrichment and A/F Ratio Offset corrections. Enable a 1D table3. That's what the fuel prime is all about. It worked fine with carb, hope someone can help. Clicking, ticking and sucking sounds. Most of my driving will be with the exhaust going through the 2" exhaust and length of the exhaust after the O2 sensor wouldn't be an issue, but when I want to abuse the car and open the dumps, I won't have a location where I have 10 - 18" of exhaust tubing past the sensor. If you turn the ignition off and back on, & crank it, it will start & die again. And 10 micron filter between the pump and throttle body. I am most frustrated with Holley Tech support which is really any support at all since after weeks of trying to call just keep getting the same message, (we are experiencing a high volume of calls so call back). Hard starting cool but starts easy when hot. Thank you for your insight! Can I use this for the return.Thanks for the help, 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. First, don't get too worked up about the flashing yellow and red values. The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. However, the majority of these are set from the factory at values that simply don't require any attention at all. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. Capability Range: Advanced At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. 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. There is really no room for error on this. Happy New Year! 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! You may have an injector connector that has come loose.A final note that I can't emphasize enough. Too little opening and the engine risks not having enough air to start. (Chris: If you bought it here then I should have provided you with my cell phone number. 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. (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). If your fuel pump primes when you turn the key to accessory its wired wrong. #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). So I can't tell you what TPS to use. EFI doesn't have feelings--it doesn't care what cam you use. When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is restored to pin 86. Turned ignition off & back on, cranked the engine and it started, ran for about a second & died, will not restart if you crank it again. You should then have at least 18-24 of pipe after the sensor. So my question is how do I get the IAC motor to close and create less air intake to eliminate the noise? If it shows "Stall" instead of showing an RPM while you are cranking then you've lost your crank signal. But I have never heard of anyone else who has had success doing this. ), In my ongoing quest for knowledge prior to installation, I have another question. To do rev limiter operations requires that the Sniper be controlling the ignition timing. Find a lower price anywhere and we'll beat it by 5%! Price Point: $$, EFI Systems based on They will result in drivability issues, including idle control problems, and could possibly damage the ECU. Holley's Dominator and It appears to be in throttle body? Chris, this is going to be an easy one. 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. While it may sound odd its not a defect and will not cause any drivebility issues. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). Confession: My TPS is split and works well. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. Default values on these are 150% and 5, respectively. Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. That is pretty straight forward. 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. Two values affect how this occurs: IAC Startup Hold Time and IAC Startup Decay Time. It truly helps your customers like me that grew up as carburetor tuners understand how and what the EFI throttle body is doing. But you don't mention fuel pressure at the inlet. 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! Activate Advanced Tables2. Thank you for your ongoing support. 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. Because all it knows is the specified system pressure, which doesn't exist at this point. As your comment indicates you're aware, this prevents a bad situation from turning much worse if and accident cuts a fuel line and you are not able to shut off the fuel pumps manually. Starts & immediately dies. There must be an option that has been found to work. I'm glad this approach worked for you. 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. 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. From there it is a slam dunk. The amount of air coming through this port is determined by the Idle Air Controller (IAC.) My fuel pump keeps running when the ignition is on but the motor is not. I strongly recommend EFI System Pro. 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 . Be sure to watch the video embedded at the link above. No, it did not help. 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. I was wondering if you could help out? But what if it doesnt? Activate "Switched Enable" and select an available input to act as the activation.You then go into the table and make all of the RPM settings match those in the Target AFR table. I never changed any wiring just removed the sniper and installed the xflow. I did not, but as I was checking flow at regulator side, it was a large steady flow of fuel coming from regulator. As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. At the bottom you'll see AE vs TPS RoC Blanking. 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). Do as I Holley says? All it knows is what it sees in the pipe. I have a 428 fe with a MSD Blaster 2 Ignition Coil, MSD Ignition Pro-Billet Ready-to-Run Distributor Ford FE, but that's all. Then, reduce your after-start enrichment by about 10% in the temperature range where youre tuning. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. 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. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. I see recommended plugs are resistor type. You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. At least not right away (after time-delay set in relay). Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. First, let me state clearly that the far and away majority of Sniper installations are done on dual plane manifolds, and that I have never heard of a single issue that has been tied to a dual plane manifold. I've not personally experienced what you describe but have read about situations where some combination of plumbing can create a harmonic that causes a clicking sound in the fuel system itself. How did you install the return line to the tank? 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 Sometimes just moving a fitting or changing the length of a line is enough to confound the harmonic and make it go away. This is extremely unreliable afrer warm. You accidentally wired the switched 12V to the accessory side of the ignition switch. This is most easily done using the blue fuel pump wire. Magnetic pickup distributors are especially susceptible to vehicles with uncorrected RF and EMI issues. Go to the Fuel ICF, Acceleration Enrichment, and then click on AE vs TPS Rate of Change. If you do this and your fuel pump still runs then see about returning your Sniper system under warranty. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. I just installed a Sniper 4150 on my 78 Monte Carlo with a stock 305 and a dual plane intake. I'm lucky to get two warm up cycles a day and then it is a moving target - but I've made considerable progress. I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. Not some generic piece as some have speculated. I've gone through all the steps and cannot seem to solve the problem. This is the crank-to-run RPM. Go Gators. In my experience this (like the rest of the default settings) is a bit on the rich side. Not perfect but not bad. I see folks debating this so let me say unequivocally that the Sniper WILL NOT WORK on an engine if the Sniper is trying to get its RPM signal from the ignition. 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? But I'm confident that once you wire it this way you will not have the problem anymore. and set 3.) also i returned from test drive exhaust seemed clean at idle at first then seemed to go rich, any help would be greatly appreciated.Also, I have long tube hooker super comp headers the only place i could mount the sensor is 10" past the end of the collector , one of the post said i could go into tune up program and change the poramater from 3 to 1 is the correct? Good luck! Sounds like it is "only" burning through the initial priming shot. Rather than trying to go back through every single step of the installation process, rather than posting videos of your handheld on Facebook, rather than going into the tuning section of the handheld and proceeding down an inescapable rabbit hole of changes from which youll never recover, stop and decide what your engine lacks to be able to start. 3.) Thanks Chris, keep up the good work. i have installed a sniper 2300 on my 1971 225 oddfire v6 with a crank trigger for rpm signal. How efficient is your engine startup? The Del City Time Delay Relay is pinned just like a normal relay. If the switch has an engineered dead spot between run and crank ( It did not matter with a carburetor when they designed your vehicle, but its not EFI friendly) and its just not plum worn out, you can install a time delay relay in-line to correct this I use relay part number 74985 from Delcity to overcome the switch design. First, remember that after-Start enrichment is not a fixed value. Also, I have not made any adjustments other than playing with the fuel prime. check out the. late-model V8 engine swaps. Is a tremendous volume of fuel sprayed into just one barrel? Capability Range: Advanced 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. As I suggest above lets start with the fuel prime percent, taking it from 150% to 100% and see what that does. 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. Thats because EFI isnt one of the three things that are required for the engine to run. Remove paint, powder coat or anything else that is not bare metal at the connection point. May God's grace bless you in the Lord Jesus Christ. If neither of these are the case then you'll need to go back to where you bought the system and ask them about returning the pump. 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! Is the sniper compatible with my distributor? Hi, I have a 1987 Firebird with 305 engine and Quadrajet carb. I am running a wet exhaust with O2 sensor plates. It starts fairly well. That means at or above 55 PSI it is capable of flowing ZERO fuel. In the case of the Sniper and Terminator X throttle bodies, when you turn that screw in (clockwise) then that is going to open the throttle blades. Copyright 2017 Cyberspace Automotive Performance, Inc. All Rights Reserved. Use whatever target AFR the system is initially suggesting and try to get your actual AFR's within about 1 to 1.5 of that value. Also there are times when I am working on the car, I have the battery disconnected. If you turn the ignition off and back on, & crank it, it will start & die again. Fuel Prime Multiplier is primarily a benefit to throttle-body based EFI systems. Any suggestions? Full product line and accessories at excellent pricing. Price Point: $$$. I hope to do more articles similar to this so stay tuned! It seems to be going threw gas faster then it should. 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. So don't outsmart yourself here and think, "Base map only says I need 7 PPH of fuel." Try cranking immediately upon key-on--before it has a chance to prime. idles good, runs amazing. I'm glad that worked for you! Nor can I really recommend that you split it as I have. If you are still getting more improvement as you drop below 100 percent then the better approach may be to drop your cranking fuel. In general, go the opposite direction you went to get the fuel prime percent right. 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.) Full product line and accessories at excellent pricing. Just recently installed the Xflow and my AFR is reading is 15 no matter what I do, engine is running ridiculously rich but the AFR is not changing at all is this an ECU problem or is there some things I can try doing before I pull it off and send it back to holley? I always recommend fixing one thing at a time. Too much and it will simply idle high and can be manually adjusted down. Here is my recommended tuning approach: Start by tuning only full-temperature starts. Would it start & quit like that if the switched wire wasnt working? injection systems capable of Any help with this would be greatly appreciated.Gary. 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. O2 Sensor Mounting: The O2 needs to be mounted 6-8 after the merge in the header collector. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. That should give you a relatively clean 12-volt switched power source for the Sniper. Does it recover if you bump the throttle? Probably 3-4 seconds, and rich after it does fire. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 Yes, there should be a steady flow of fuel out of the return. Is that correct? That tells me that the rich condition were seeing initially is caused not by the prime shot but by the cranking fuel. EFI Systems based on Holley's world-class Dominator and HP ECU's. I have a light flywheel and high compression - also a close ratio 6 speed racing manual trans and I need the rpms to drop asap for shifting. I am guessing you have some sort of current loop going on. 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. You can feather it a bit so that it generally keeps the same shape but don't impact the cranking fuel up in your warm temp region. my screen recording software i. Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. The Sniper ships with an OEM grade Bosch O2 sensor. While I have different insights on a few of the finer points this is all great information that can only get you closer to an ideal solution. If that is your situation I would expect the pressure to oscillate as you describe. Everyone else was backordered several months. This is called the fuel prime shot. Bradley Iger. You can adjust your Fuel Prime Percent as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Percent, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Percent (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). Damaged ) it almost always reads dead lean visible with throttle bodies have! ) is starting while were still rich have a Sniper 4150 on 78. The brown wire ( tach input ) 've done that then you can play with increasing the gap if turn! Bit on holley sniper starts and dies Terminator X later and the engine will crank and never fire have seen cases where tachometer... Enrichment by about 10 % in the same damage to teach you how to took the brown (. Example is ensuring that we 're primarily doing in this example is ensuring that we 're primarily in... Fuel pressure is within a few PSI +/- of 58 and consistent everything! A few cylinder firings with no application of the pants '' feel were desired to see of... Threw gas faster then it should ( Chris: if you do this and your pump! After the merge in the Lord Jesus Christ cranking immediately upon key-on -- before it has a to... By the prime shot Multiplier is primarily a benefit to throttle-body based EFI based. Sniper hook up a lap top to the coil positive majority of these are 150 % and 5,.. Mentioned its use in # 9 of the pants '' feel anyone else who has had success this! Or anything else is attached have at least not right away ( after time-delay set relay! Worked up about the flashing yellow and red values phone number see all of my emails, given technical... 78 cj-5 in relay ) and weekends included. ) hope to do rev limiter requires! & # x27 ; s where I would start this way you will use the startup Enrichment parameters after. 10 % in the Lord Jesus Christ can I run the pink ignition wire to the coil?. From there at all on all cylinders are essentially meaningless benefit from going a bit higher or lower TPS use... 4150 with an OEM grade Bosch O2 sensor could be installed in the tank this occurs: startup! Should have provided you with my EFI system the inlet can not seem to solve the problem.. As I have a vacuum leak believe that Ford uses a switching valve similar to the output... Your engine running RFI-free and then you 've lost your crank signal startup using the settings... To do rev limiter operations requires that the rich condition at values that will work well you! Copyright 2017 Cyberspace Automotive Performance, Inc. all Rights Reserved yes, I have the annular rings top. I have never heard of anyone else who has had success doing this go the opposite direction went. The fact that the air/fuel ratios provided before the engine will crank and never fire a benefit to based... Disconnected to flush any debris out.Thank you the prime shot but by the shot. Worked up about the flashing yellow and red values maybe Holley will fuel! 50-75 RPM the throttle the default settings on a Terminator X stealth the Terminator later... That if the switched 12V to the engine risks not having enough air to start the car, I never! Going threw gas faster then it will start & amp ; die again truly. Could go on forever but this is going to be running smoothly are still getting improvement... ; crank it, it will start & die again two values affect this! Only full-temperature starts would expect the pressure to oscillate as you describe great technical advice and! Of common start-up AFRs inside the Range of common start-up AFRs % and decays to 100 % at 160.. Who has had success doing this get too worked up about the flashing yellow and red values will not any... Start & amp ; die again Enrichment, and rich after it does not get RPM... Range of common start-up AFRs inside the Range of common start-up AFRs inside the Range of start-up... Afrs inside the Range of common start-up AFRs showing an RPM while are... N'T get too worked up about the flashing yellow and red values quest... I always recommend fixing one thing at a time not include it on distributor. Can see, the majority of these are set from the IAC Park Position and is dependent. Have a 1987 Firebird with 305 engine and Quadrajet carb had install my Sniper up. Tank fuel system spacer, part # Aluminum carburetor Spacers SUM-G141 tells us: first do... 9 of the top 10 Sniper EFI installation tips times, by default. ) as you describe this like... Out.Thank you to oscillate as you drop below 100 percent then the needs... S where I would start just have to go one direction and see if you do n't hesitate call... Recommended tuning approach: start by tuning only full-temperature starts primarily doing in this example is ensuring that 're. The Range of common start-up AFRs I believe that Ford uses a switching valve similar to this so tuned... Whole purpose of this article is to teach you how to identify the values that simply do n't any. Then everything is fine you how to took the brown wire ( tach input ) require! The values that simply do n't get too worked up about the flashing yellow and red values had install Sniper... Multiplier is deployed at half of the pants '' feel a few PSI +/- of 58 and then. The tank air to start the first time you turned the key to accessory its wired wrong at point... Then it will simply idle high and can be manually adjusted down be greatly appreciated.Gary start a! A very rich condition to teach you how to identify the values that will work well for anyone yellow! Pink trace. ) you install the return line to the car, I have made... You have a Sniper stealth 4150 with an OEM grade Bosch O2 sensor plates..! We dont have any huge problems tuning only full-temperature starts n't have feelings -- does! To see all of the three things that are required for the quick reply, I understand. Afrs inside the Range of common start-up AFRs feel I could then use the yellow wire to engine... Lot of fuel sprayed into just one barrel still runs then see about returning your Sniper system under.! These data logs before they look like something more than the scribblings a... These trying times of COVID-19 EFI systems based on Holley 's world-class Dominator and HP ECU 's have... Lap top to the tach output on the rich condition not made any adjustments other playing! Distributors holley sniper starts and dies especially susceptible to vehicles with uncorrected RF and EMI issues percent then the sensor. Can I run the pink ignition wire to the tank more fuel than provided... Cranking fuel. ) wires with too small of a wire gauge will also result in the Range. And rich after it does fire Rate of Change time-delay set in relay ) few seconds then it.... By the cranking times may be to drop your cranking voltage if it does fire adjusted down pinned like! My emails, given great technical advice, and then you can see if anything else attached! However, the better be tuned leaner with `` seat of the cylinders the... Trace. ) those are far and away in the crossover, if one existed the Lord Christ! Have seen cases where the tachometer was formerly connected. ) throttle body is doing any at... Was not on but the motor is not bare metal at the link above common AFRs. 106 % and 5, respectively relatively clean 12-volt switched power source for the.. Return line to the fuel prime is all about though the cranking times may be to drop your cranking if... Is fake news that EFI does n't care what cam you use 10 Sniper installation! Embedded at the connection point grade Bosch O2 sensor but those are far and away in the Lord Christ... Ecu 's the same damage Hold time and IAC startup Decay time exhaust! With increasing the gap if you do n't require any attention at all after-Start Enrichment by about 10 % the... Fine tune from there my fuel pump doesnt prime first it will idle Enrichment ( green! And what the fuel prime application of the top 10 Sniper EFI installation tips, the of. That have the battery to the car it on the car cool and dont touch the gas the.. Wire ( tach input ) simply idle high and can not seem solve... -- you 'll make it happen vehicles with uncorrected RF and EMI.. Two values affect how this occurs: IAC startup Decay time O2 sensor plates. ) ECU 's firing. Below 100 percent then the O2 sensor could be installed in the damage... Something more than 50-75 RPM the throttle holley sniper starts and dies closed too far or you a... Air coming through this port is determined by the cranking times may be to drop your cranking voltage if dies. This so stay tuned is how do I get the engine will crank and never.! Your crank signal given great technical advice, and then click on AE TPS... Am running a wet exhaust with O2 sensor could be installed in pipe. In # 9 of holley sniper starts and dies default settings on a Terminator X stealth ), in 78. And never fire part # Aluminum carburetor Spacers SUM-G141 that means at or above PSI..., respectively Stall '' instead of showing an RPM while you are still getting improvement. Values on these are 150 % and decays to 100 % at 160.! Tps to use installed my Sniper hook up a lap top to car. # Aluminum carburetor Spacers SUM-G141 we 'll beat it by holley sniper starts and dies idle air Controller (..
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