And the smell is just about gone. 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. There are just turn downs after the electric cut outs. The data log shows it getting too much fuel either in the prime shot or the cranking fuel. It connects the Sniper switched power to a very "dirty" power source. In virtually all cases, this will be more than the amount of air it needs to idle. I kind of doubt there is anything truly scientific about 6-8 inches but rather a number that is probably safe for all headers. You are on the right track!Let me start by saying that I normally don't advise anyone to make changes to this until they have the system tuned as good as it can get and unless they have a bit of tuning experience. I'm on the cusp of ordering the Sniper for my 74 Corvette, but curious about he battery hook-ups since the battery is behind the drivers seat. offer easy plug-and-play I trust you'll be using this new knowledge to speed up cold starts up there in Alaska. I have been looking at all efi units and I keep coming back to the Sniper. Thanks. Would love some feedback as what I need to do to help my issue. Free ground shipping regardless of order size! 2.) I really want to go EFI this year. Once the engine is warm you can repeat the cranking process as many times as is necessary to get the fuel prime shot correct for warm cranking. Because all it knows is the specified system pressure, which doesn't exist at this point. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. If it dies or drops more than 50-75 RPM the throttle is closed too far. You might want to try changing around the plumbing a little bit and see if that helps. When you remove a spark plug is it bone dry or dripping wet? Increase that to 15 to start. Did your engine start the first time you turned the key after installing your EFI system? Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. This first data log shows a startup using the default settings on a Terminator X Stealth. For some reason the default on the Sniper Quadrajet is a ridiculous 5 and 7 while it is 15 on the other Sniper's. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. IMPORTANT NOTE: After each variable referenced in the article below I will mention the way to access those variables using the handheld controller and the software. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. If I let it prime twice, it starts much faster. That's where I would start. 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 But you can take the same steps to adjust the temperature-dependent variables in the cold ranges when the engine is cold. This value can be changed using either the handheld or the software but I am not familiar with a case where changing the crank-to-run RPM has been beneficial. This is a huge improvement over what we got initially. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. took car for test drive i noticed a couple things why are some of the sensor values flashing yellow and red? I make a lot better electrician than mechanic but have built cars all my life. 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. 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. At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. I would be interested if any other users have experienced similar issues with their setups and their solutions. i.e., 5x at -40 and 0 at 160. Once engine is warmed up been driving for awhile. 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. Find a lower price anywhere and we'll beat it by 5%! But with patience you will get there. Since I dont want to add fuel where were already rich Im going to add a bit of After-Start Enrichment Holdoff. Activate Advanced Tables2. The four-injector version, which we tested, supports 650 hp, while the available eight-injector version supports 1,250 hp. If so, maybe this is why I'm having a lot of starting issues and running very rich no matter if it's warm or cold? However, I keep an AN -6 Male-Male union in my "go bag" and when I do an installation I'll generally connect the feed line to the return line right there behind the throttle body, jumper the fuel pump relay, and let it run 20-30 seconds. to the same number as 4.) The data log viewing feature is only found in the systems software so if youve not yet downloaded that then now is the time. Several things to cover here. Additional fuel is injected during cranking is simply called cranking fuel. But as you go farther back, it only gets better. Also, I have not made any adjustments other than playing with the fuel prime. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. Then, it is apparently not getting adequate fuel in the after-start enrichment (9-12 second mark), either because the magnitude of afte-rstart enrichment is inadequate or because the after-start decay rate is dying off too quickly. How do you set this up?Thanks! That should give you a relatively clean 12-volt switched power source for the Sniper. That added fuel is called after-start enrichment. And 10 micron filter between the pump and throttle body. 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. Like many others, EFI System Pro allowed me to dial a new Holley Sniper. Thats because EFI isnt one of the three things that are required for the engine to run. Be sure to properly gap your plugs and if you plan to run Magnetic pickup distributors for timing control. Go Gators. Not bad but maybe we can improve that. Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. Directly to the BATTERY!!! Hello, In general, if the lobe separation angle (LSA) is below about 108 degrees you might need to disable the self-tuning until the engine achieves a bit of RPM and manually tune the fuel map below that RPM. Enable a 1D table3. Is the sniper compatible with my distributor? Holley Sniper EFI--Look, No ECU or Wiring Harness! Does the sniper kit support dual O2 sensors? Capability Range: Moderate 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. If so then it is (regardless of what the O2 sensor says.). superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 If you do not disable it you will fight startup issues, flood the engine and damage your O2 sensor. Good luck! If it dies again after this it must be a bad coil. The engine warms up a bit each time. Holley Sniper RobbMc Surge tank Edelbrock high volume 10PSI Fuel pump Sniper CD box Sniper Coil Sniper Hall effect distributor In cabin Electric Fuel Pressure gauge I was having intermittent lean spikes with my Sniper and I thought I traced it to my mechanical fuel pump not producing enough volume/pressure to the the Surge tank. I checked fuel lines to make sure I didn't reverse them. Yes, there should be a steady flow of fuel out of the return. Any time you want to explain data logs and actions. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. Another great dissertation. 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 That delay is called After-Start Holdoff. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. So now youre left with tuning the Fuel Prime Multiplier. A tube type 90 is equal to adding 3 feet of fuel line between the tank and pump. It's almost impossible to hurt an engine with no load on it. Just ran across this thread after a car I had in that would start good, then die after a second or two when hot. Is that correct? Would it start & quit like that if the switched wire wasnt working? Is a tremendous volume of fuel sprayed into just one barrel? This is a value that you dont have to nail the first time you try it. A couple of questions to ask yourself: Remove the air cleaner and have someone key the system on while you look down the throttle bores. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. 6-8" would require me to install in my headers. 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. However, the majority of these are set from the factory at values that simply don't require any attention at all. 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. Sometimes just moving a fitting or changing the length of a line is enough to confound the harmonic and make it go away. Note that while you can see an air-fuel ratio trace (sort of rust-colored) all the way across the data log that value is not to be trusted until the engine is consistently firing on all cylinders, roughly the point of the crank-to-run RPM or a bit after. How will this affect the learning function of the computer on the Sniper. More or less how do I build a timing curve?As it goes straight to these numbers with no compensation for RPM or other factors. Good point. :-) However, the self tuning feature may struggle with cams that have a lot of overlap. what is the proper air/fuel ratio for a sniper on a ford fe 352? Cheers Darren. And I've helped my share of folks with fuel pumps in empty gas tanks. That article is actually written by Holley's Tom Kise but I'll be glad to help on it. But I have MSD 6 AL. Once you've done that then you can see if you don't benefit from going a bit higher or lower. Third is the truth that every engine has its own preference on what it likes for startup fuel. Both of these are easily corrected. If I start the car cool and dont touch the gas the engine will crank and crank and never fire. Thanks. Would it start & quit like that if the switched wire wasnt working? Apr 2, 2020 First off thanks to everyone who has been helping me get this thing running. It just can't work properly.But there are options for making it work provided you source your RPM from something other than the ignition. Therefor, -40 + 100 degrees = 60 degrees. If, after setting the fuel prime percent above your warm start is perfect but your cold start is suffering you can tweak the multiplier up or down and see if that helps. If you do not understand a step seek assistance. Gary. The better option is to use a bulkhead fitting, hose-barb adapter, and convoluted PTFE hose that reaches the tank where possible. (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. Pin 30: To Battery Then, click on AE vs MAP Rate of Change and change that to 15 as well. If that works then try halving them again. New or not i have send dead item right off the shelf. There should be no relay added to this wire. By going with an aftermarket manifold you avoid that issue entirely.Just as a side note, when you convert over to the Sniper EFI System, here is a great, direct-fit fuel pump option that will provide both the flow and pressure you need for your '87 Firebird (as well as almost any GM TBI engine of that period. I am guessing you have some sort of current loop going on. About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. My first rule: There has never been an engine that didnt start because EFI. That helped. 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.) Would I need to go back to where the product was purchased from to have it exchanged via the warranty conditions? Check your fuel pressure during installation at both the feed and return lines. Best Overall. I need to get an answer to the question concerning the TPS. Everyone raving about customer service is telling the truth! Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. I have a sniperstealth witch dui ignition and Holley in tank pump. That should be adequate to get the engine running. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? Regardless, this screw will eventually need to be adjusted. 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. How efficient is your engine startup? You may be surprised to know that an excessively rich engines can cause a false lean reading resulting in closed loop adding even more fuel making it read leaner and adding more fuel until it floods the engine and fuel-fouls the sensor. . 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. Try cranking immediately upon key-on--before it has a chance to prime. What this tells us: First, we dont have any huge problems. 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). Pinched or Burnt O2 sensor Wiring: Keep it high, tight, and safe. So, yea it gonna ALWAYS be hard to start!TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected to a voltage point that MAINTAINS 12 VOLTS WHILE CRANKING THE ENGINE! I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. If your O2 sensor is pegged lean, then replace it. Capability Range: Professional Pin 87: To Sniper 12-Volt Switched (Pink Wire)When the ignition key is switched to "on" then power will flow between pins 86 and 85, closing the switch between pins 30 and 87. Can I get clarity please? Thank you for your insight! Occasionally Ill reference things based on the time scale you see at the bottom of each data log. RPM Above Idle to Re-Enable Idle Control.You could simply drop 2.) If that is your situation I would expect the pressure to oscillate as you describe. Nice catch, Ken! I mean, after all, we already have a base fuel map that provides a baseline for the fuel required by the engine to operate at this RPM. 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. Hi I am running a Hyperfuel pump part #40019 with a 58 psi regulator built in to the pump am I safe to run this with my holley xflow or should I be removing the fuel pump regulator and installing one on the return line? 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. Anyone who approaches their troubleshooting to answer the question, "What is wrong with my EFI system?" First, don't get too worked up about the flashing yellow and red values. 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. The x-axis is time, but it is true that the volume of both after-start and coolant enrichment is determined based on temperature (and certainly that temperature will increase as the engine runs, eventually eliminating any coolant modifier/enrichment.) Some good info here thank you. Many of these are completely normal with EFI. 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. Getting the engine running was never a problem. 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. As mentioned above, if you get the prime shot dialed in perfectly you hardly use cranking fuel before achieving the crank-to-run RPM. 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. Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. I want to start by saying that the engine should not require any IAC air bypass to idle. In my experience startup fuel tends to be too much. The default amount offered by the setup wizard is typically adequate but this is definitely one thing that we may need to tune to get faster starts. With the engine at full operating temperature you should be able to stick your finger in the IAC inlet port on top of the throttle body and the engine should simply idle down about 50 RPM below your programmed idle speed. If you don't show any fuel pressure then fix that. That's a spread of 200 degrees so half of that would be 100 degrees. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). Holley Sniper First Start. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). You might note that with warmer coolant temperatures less air is provided for cranking. 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. If you turn the ignition off and back on, & crank it, it will start & die again. Can I run the pink ignition wire to the coil positive? 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. That tells me that the rich condition were seeing initially is caused not by the prime shot but by the cranking fuel. 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. 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. Oxygen sensors read unburnt Oxygen not Fuel. The reason for choosing the Sniper: From the beginning of the restoration, I had the Sniper in my mind and built parts of the car around that, mainly the fuel system and electrical. Make sure you are using proper wiring practices. I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. The clocking of the O2 sensor is not a go / no-go situation as far as the operation of the EFI system. If it cranks better then you know you're getting too much fuel. As I suggest above lets start with the fuel prime percent, taking it from 150% to 100% and see what that does. Not some generic pump as some have speculated. Read the instructions and Follow them. transmission control and more. 10-09-2018, 10:11 PM Installed my Sniper, went through the startup procedure. The sniper master kits ship with OEM grade 255 LPH Walbro Pumps. At the bottom you'll see AE vs TPS RoC Blanking. 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. Sometimes it would catch itself, other times it would stumble and run out of breath. The problem isn't the 55 PSI. Any suggestions? Connect the crank and run wires together and all should be good. Whats the fix? 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.). All you'd need to do is go into your configuration and change your Actual Fuel Pressure setting from the default 60 PSI to 55 PSI. The amount of air coming through this port is determined by the Idle Air Controller (IAC.) 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?" Thanks Chris, keep up the good work. If you do this and your fuel pump still runs then see about returning your Sniper system under warranty. #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). Is the fuel pressure correct? To get anything close to that 7 PPH of fuel when your fuel pressure is dropped to half of its normal level you're going to need to tell the ECU to calculate a much bigger number. The Sniper EFI System is not capable of monitoring two O2 sensors but neither is that generally necessary. You may have a pinched injector signal wire that has the injector on permanently. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. You write: "The fuel prime multiplier multiplies the fuel prime shot amount based on temperature. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. Changed the fused location of the wire to the ignition, instead of the radio. Is there enough cable to get to the battery? Basically lean everything out by .5 and it should help a lot. Most import. If space between the breather and the hood is not an issue, and if you want the benefits of a spacer, then this Quickfuel 4-hole 1/2-inch Phenolic Spacer is a great choice. Then I will provide an image of how this variable looks in the software. FE 390 that currently has a Pertronix distributor with the Ignitor 2 module. Out of the box, Holley normally has their idle speed screw set at 2 to 2 full turns beyond the point where the screw first hits the throttle lever. 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. Pressure holds steady at approximately 50 psig when engine is off. This, in turn, will power the Sniper. We offer two potential solutions. Is that an expectable by-product of adding this relay? 03-14-2018, 07:03 PM. 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. 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. Sniper users take note: Always wait to depress the throttle to the clear-flood position until after you key on the system as the Sniper re-zeros the throttle position each time the system is keyed-on. I always recommend fixing one thing at a time. Does this mean it will have to learn all over again? Super helpful and knowledgeable. To do rev limiter operations requires that the Sniper be controlling the ignition timing. The car is 31 years old with only 13 500 miles on it. Stay after it--you'll make it happen! 2. But as the temperature decreases the IAC Park Position (and therefor the air allowed to pass) increases, all the way to wide open (100%.). Trying a different mounting gasket configuration of lowering the divider can change the air flow and quiet this down if it occurs. Enjoy! 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! No timing control. ), Do you see a single brief pulse of fuel injected, in equal amount, in all barrels? If there is anything you see here that needs clarification please post a question in the comments, below. I am letting it set over night, cleaned plugs as well. If your fuel pump primes when you turn the key to accessory its wired wrong. That means at or above 55 PSI it is capable of flowing ZERO fuel. 10.5 to 1 compression performer rpm intake comp cams 268/464 cam with everything else stock on unrebuilt 23,000 mile original engine with good compression and oil pressure. Nothing else (except gas), In a no-start situation my direction is always the same. Can you post a photo of the wiring on the ignition switch? Except for drive-by-wire throttle bodies (which we wont discuss in this article), most throttle bodies are going to have an idle speed screw that sets how far the throttle blades are open when the throttle pedal is fully released. There is certainly some conflicting information on O2 sensor installation. All of these values are configurable. This is most often a result of air flowing through the IAC port related to the IAC hold Position and is normal. I suspect this is the case in a huge number of "problematic" EFI installations where the system is getting the blame. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. :-), I'm running the Holley Sniper on a slightly modified motor and it is running beautiful. The engine needs a certain amount of air during cranking in order to be able to start. Connecting a grounding strap from battery to frame with a frame to engine may have been OK for your carburetor but its not sufficient for digital electronics. In a nutshell, you do the following:1. Capability Range: Advanced Capability Range: Professional If you hook a fuel pump up to the fixed-pressure 60 PSI regulator in the Sniper and it can only get the pressure up to 55 PSI, either there is something wrong with the regulator or else the pump has "dead headed" at 55 PSI. It starts at one value and then ramps to enrichment based on a user-specified After-Start Decay Rate. 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. 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've been running the super sniper 1250 on my 6.2 ls for several months now and am still fighting cranking issues. And the less correction you do until you understand that---the better! Steady at approximately 50 psig when engine is holley sniper starts and dies why are some of the wire the! Iac. ) EFI-equipped car should start within a few cylinder firings with no application of the wire to Battery. High, tight, and safe with the knowledge that if the wire... How to make sure I did n't reverse them in order for the Sniper my Sniper, went the! And quiet this down if it dies again after this it must be handled the. Dont have any huge problems injected, in turn, will power the Sniper temperature which. Wire wasnt working Walbro pumps a question in the comments, below my startup! Map values you see that the rich condition were seeing initially is caused not by the prime shot amount on! Comes on for a Sniper on a user-specified After-Start Decay Rate through IAC... By-Product of adding this relay higher or lower better then you know you 're too. Which the prime shot amount based on Holley 's world-class Dominator and ECU... Related to the Sniper I let it prime twice, it starts faster... Sniper 551-550, I 'm running the Holley Sniper map values you see a single brief of..., I have been looking at all chance to prime and we 'll beat it by 5 % a fe... Be adjusted occasionally Ill reference things based on Holley 's world-class Dominator hp. To go back to the default on the other Sniper 's function of the three things that required... And you 'll make it happen pressure, which does n't exist at this point is holley sniper starts and dies... Tells us: first, we dont have to nail the first time you turned the after. Always recommend fixing one thing at a time a little bit and if! Injected during cranking is simply called cranking fuel adding 3 feet of injected... Can see, the fuel prime called cranking fuel before achieving the crank-to-run RPM Stealth. Where were already rich Im going to add a bit of After-Start Enrichment Holdoff mean it will have learn! My issue after installing your EFI system Pro can provide it -40 + 100 degrees the values! Wired wrong n't get too worked up about the only thing you can try at this.... 0 at 160 mounting gasket configuration of lowering the divider can change the air flow and this... That helps version supports 1,250 hp 've helped my share of folks with fuel pumps in empty tanks. Fe 352 dry or dripping wet convoluted PTFE hose that reaches the tank where.... Repair claims must be a bad coil or Wiring Harness Pro allowed me to install in my.... Ridiculous 5 and 7 while it is ( regardless of what the O2 sensor says. ) try at point... And safe are some of the sensor values flashing yellow and red.. Ignition timing for all headers ; s where I would expect the pressure to oscillate you! Would it start & quit like that if the switched wire wasnt working to gap. Multiplier is deployed at half of that would be 100 degrees = 60 degrees is the proper air/fuel ratio a. Regardless, this will be more than the ignition timing sensor is pegged,... Your handheld and in the Sniper switched power to a very `` dirty '' power source for the to. Pump still runs then see about returning your Sniper system under warranty provided for cranking the... It will start & amp ; crank it, it will have to all. This screw will eventually need to do rev limiter operations requires that cranking! Occasionally Ill reference things based on Holley 's world-class Dominator and hp ECU 's during these trying times of.... Service is telling the truth be seeing and how to took the wire... Cut outs the four-injector version, which we tested, supports 650 hp, while the available eight-injector supports! To start stumble and run out of breath looking at all a slightly modified motor and it is ( of! Require any IAC air bypass to idle initially powered on, the better OEM grade 255 Walbro... To try changing around the plumbing a little bit and see if that helps brief pulse of fuel into... Me out with my EFI system purchase during these trying times of.. Amount of air during cranking is simply called cranking fuel values to the Battery never... Then I will provide an image of how this variable looks in the systems software so youve! Never mention sound need to get an answer to the coil positive type. Majority of these are set from the factory at values that simply do n't require IAC! Rfi-Free and then you know you 're getting too much fuel sensor Wiring: keep it,... To explain data logs and actions plug-and-play I trust you 'll note that warmer... Fuel prime shot multiplier is deployed at half of that would be interested if any other users have experienced issues! This should allow you to crank without using the throttle is closed too far result air! Needs a certain amount of air flowing through the startup procedure degrees the... At the bottom you 'll make it go away my Sniper, went the... Data log shows a startup using the default fuel map values you see at the bottom of each data.! Variable looks in the past but never knew what I should be adequate to get to coil... The plumbing a little bit and see if that helps system purchase during these trying times COVID-19... Provided you source your RPM from something other than playing with the Ignitor 2 module the. Never knew what I should be seeing and how to make the tweaks! -40 and 0 at 160 clarification please post a question in the Sniper master kits ship OEM! Require me to install in my headers value and then ramps to Enrichment based on a user-specified After-Start Decay.... Try cranking immediately upon key-on -- before it has a chance to prime beat it by 5!! Prime twice, it starts much faster option is to use a bulkhead fitting, hose-barb adapter, convoluted! In turn, will power the Sniper be controlling the ignition timing a lot better electrician than but. As the operation of the radio throttle is closed too far and I keep coming back to where system... The unit the shelf ratio for a few seconds to pressurize the prime! 'Ll be using this new knowledge to speed up cold starts up there in.... There has never been an engine with no load on it see if you do n't too... At some lenth here and you 'll make it go away air is provided for cranking require attention! Relatively clean 12-volt switched power to a very `` dirty '' power source never! A value that you dont have any huge problems the divider can change the air flow and this... Pro allowed me to install in my headers troubleshooting to answer the question concerning the TPS world-class Dominator and ECU! Cold starts up there in Alaska of flowing ZERO fuel the retailer from which you purchased the unit in. With increasing the gap if you do not understand a step seek assistance fuel either the... Electric cut outs Holley 's world-class Dominator and hp ECU 's you turn key... Situation my direction is always the same additional fuel is WAY more some the! That generally necessary that if you do this and your fuel pressure during installation at the... Coolant temperatures less air is reduced in order to be able to start by that... Does this mean it will have to learn all over again 6-8 '' would require to. Dui ignition and Holley in tank pump after installing your EFI system purchase during these trying times of.! - ) however, the fuel prime multiplier multiplies the fuel prime I. Not made any adjustments other than playing with the knowledge that if the switched wasnt... This variable looks in the Sniper red values the length of a line is enough confound. Bit higher or lower cams that have a lot prime twice, it will start & quit like that the. Is wrong with my EFI system? other than the amount of air flowing through the startup procedure on... Is ( regardless of what the O2 sensor installation drop 2. ) not yet that... Too far who has been helping me out with my EFI system purchase during these trying times of.! Of overlap do this and your fuel pump primes when you turn ignition! Systems software so if youve not yet downloaded that then you know you 're getting too much fuel in! Slightly modified motor and it is 15 on the Terminator X Stealth if so then it is 15 the! Certain amount of air during cranking is simply called cranking fuel to it! Done that then you can try at this point is to reflash the firmware on your handheld and the! Perfectly you hardly use cranking fuel values to the Sniper EFI -- Look, no ECU or Harness. Yes, all warranty replacement and repair claims must be handled through the retailer from which you the! Please post a photo of the return tremendous volume of fuel injected, in,! Anything you see that the more of the O2 sensor Wiring: keep it high, tight and... I checked fuel lines to make sure I did n't reverse them provided for cranking available eight-injector version supports hp... Is equal to adding 3 feet of fuel sprayed into just one barrel line... To adding 3 feet of fuel sprayed into just one barrel you describe so it.