My fuel pump keeps running when the ignition is on but the motor is not. 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. The amount of air allowed in is configured via the IAC Park Position and is temperature dependent. Price Point: $$, EFI Systems based on Default values on these are 150% and 5, respectively. Disable the tach sweep on your ignition box. The sniper master kits ship with OEM grade 255 LPH Walbro Pumps. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. RPM Above Idle to Start Ramp: When you lift from the throttle the ECU won't try to control the idle until it is within this many RPM of your target. Holley's Dominator and Back to holley.com . Capability Range: Professional Is the sniper compatible with my distributor? Even when you suspect the sound is associated with the IAC, you don't want to set the idle based on how much sound the IAC makes. 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. 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. Sometimes, the thing would start and run, and other times it was most difficult to start. Seems like thats what its doing. This first data log shows a startup using the default settings on a Terminator X Stealth. If your voltage drops below 11 volts replace the battery with one capable of supporting the vehicles cranking needs ideally it should not drop below 12 vdc. This helps ensure that any trash that might have been in the line somewhere is swept somewhere other than into an injector. Sounds like it is "only" burning through the initial priming shot. 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! Hi Chris,Thank you so much for your quick response to my query. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. 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. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 This, in turn, will power the Sniper. Can you post a photo of the wiring on the ignition switch? Chevy 350, rocker cam, mild cam. 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. 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. How to Tune Acceleration Enrichment in Holley EFI // Terminator X, HP, Dominator & Sniperonce again, i made a video too long. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. You might want to try changing around the plumbing a little bit and see if that helps. I checked fuel lines to make sure I didn't reverse them. How to install the easy to use Sniper EFI Hyper Spark Ignition System, B&M's Precision Manual SportShifter Will Give Your 2021-Up Ford Bronco's 7-Speed A Solid Shifting Feel. You may have an injector connector that has come loose.A final note that I can't emphasize enough. 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). I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. 2-Barrel Sniper EFI 2300 Sniper EFI C10. I need to get an answer to the question concerning the TPS. 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. Price Point: $, Advanced throttle body If you have RF and or EMI issues you need to correct them. Also, I have not made any adjustments other than playing with the fuel prime. Have you ever watched a post nuclear apocalypse movie? Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? Will the height of the return line be an issue? 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. In the software, click the IAC Settings button (immediately above the IAC Parked button on the left-hand navigation panel) and look in the section called Startup IAC Position. Hard starting cool but starts easy when hot. 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). I am in the middle of plumbing my new sniper throttle body system. May God's grace bless you in the Lord Jesus Christ. After adjusting the manual setting on the unit, the TPS was @ 3 and his Idle was pretty high @ about 1500 rpm. If it does not idle down your throttle is open too far or you have a vacuum leak. 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. Are you running timing control? Good luck! Not perfect but not bad. It drains the battery almost dead then will fire up. PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. Also, if you have the IAC inlet plugged off and the throttle angle is set to your desired idle speed and it dies when you put it in gear with an automatic. Lets try 75% on the fuel prime. No, it did not help. To be 100% honest I was having an issue prior and flooded it. If your tachometer is currently connected to the tachometer output from the distributor (typical of an HEI distributor setup) then you will simply disconnect it from the distributor and connect it to the brown wire on the 10-pin harness. 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. Super helpful. 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.) I have a datalog. Pin 30: To Battery 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. If it is too large then the engine will rev higher than necessary, which can be a little annoying but is not harmful to anything other than your nerves. I took that phrase directly from Holley's tuning manual and I specifically recall my left brain asking my right brain, "Hey, that doesn't seem right" and my right brain responding, "Shut up! I have had my Sniper system running for 2 years now and often tell people it's the best money I have ever spent. 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. MSD recommends non resistor plugs. This is the crank-to-run RPM. If your O2 sensor is pegged lean, then replace it. Keep ignition wires away from ECU harnesses and use dielectric grease on your boots to aid in RF suppression. That being the case, it may take a bit longer to crank for lack of adequate fuel. I really want to go EFI this year. At least not right away (after time-delay set in relay). The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. 4.56 rear gear and total weight is 2825 with me. All seemed well with the setup and going through the handheld. Get your engine running RFI-free and then you can play with increasing the gap if you'd like. But I suspect that's not the case here. Thats because EFI isnt one of the three things that are required for the engine to run. Bill Tichenor. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? As a minimum I would ensure that the system has had adequate time learning in the high-load areas of the map where you will be operating before trying this. Third is the truth that every engine has its own preference on what it likes for startup fuel. Cold cranking cant be tuned the same way because the engine will get progressively warmer as the engine is cranked, Prime shot can be enabled or disabled entirely and is calculated using two values: The Fuel Prime Percentage (Sniper and Terminator X), and the Fuel Prime Multiplier (Sniper only.) Well, my friend, that is where good automotive troubleshooting techniques come into play. The fuel pump should turn off after 5 seconds until the motor is started. 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. Is that an expectable by-product of adding this relay? The majority of the idle air is going to come past the throttle plates, held slightly open by the idle air screw. 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. 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. offer easy plug-and-play The xflow instructions state it needs 60 psi. Advanced throttle body injection systems capable of transmission control and more. If that works then try halving them again. Do I still need the holley 12-753 30 amp relay. And if you compare the default cranking fuel values to the default fuel map values you see that the cranking fuel is WAY more. Let me know what works for you! multi-port EFI systems I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. I am running a wet exhaust with O2 sensor plates. 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. :-). From what I read it should not be installed vertically? That's where I would start. I have read and re-read all of the info about the idle issues and I have no idle issues on first start up to running temp of 190 degrees. I can't find a good spot in the fuse block, I don't recommend this. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. For the Sniper it is best to run resistor plugs. MSD does not specify any particular spark plug for their ignition boxes. 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. Another great dissertation. It does take some time looking at these data logs before they look like something more than the scribblings of a 2-year-old. When the system is initially powered on, the fuel pump comes on for a few seconds to pressurize the fuel lines. 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. He gave no details, is this an option and how would one go about this. Confession: My TPS is split and works well. Quick Start Tuning. 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. 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. Is a tremendous volume of fuel sprayed in all barrels? Nor can I really recommend that you split it as I have. Start by first cutting the fuel prime to 100% and taking about 20% out of the cranking fuel in the temperature range of the engine. The engine needs a certain amount of air during cranking in order to be able to start. Continues rich and then goes a bit lean. The engine warms up a bit each time. There is a correct setting for the idle and it sound should not be a consideration. 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. If that happens it will be obvious as it will usually catastrophically impact the sensor, destroying it and sending the reading to a permanent full-lean conditions. shut truck off. Is the fuel pressure correct? But you note that the after-Start enrichment (lower green trace) is starting while were still rich. I always recommend fixing one thing at a time. Starts & immediately dies. Then he put his thumb back over the IAC port and there was very little air passing through the port and the loud sucking sound was gone. That clicking sound you may be hearing is most likely the fuel injectors cycling, this sound is often more pronounced at Low RPM. Exactly. My car is going on the dyno for final tuning next week. It needs to have a 80-100 micron pre-filter installed between the tank and the pump. 6-8" would require me to install in my headers. Free ground shipping regardless of order size! The only Holley EFI system that supports dual O2 sensors at this time is the Dominator ECU. Would love some feedback as what I need to do to help my issue. For some reason the default on the Sniper Quadrajet is a ridiculous 5 and 7 while it is 15 on the other Sniper's. Any suggestions ? Make sure you are using proper wiring practices. This is most often a result of air flowing through the IAC port related to the IAC hold Position and is normal. This is extremely unreliable afrer warm. Is the Sniper EFI system rev-limiter capable. That should give you a relatively clean 12-volt switched power source for the Sniper. Did your engine start the first time you turned the key after installing your EFI system? 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. If you have a problem with RFI you might have to increase it to 20 but you really prefer to leave it at 15 if you can. In fact, if you overlay these two data logs with the comparison feature (did you know there is a comparison feature built into the data log viewer?) 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. Holley Sniper EFI Check Latest Price. I suspect this is the case in a huge number of "problematic" EFI installations where the system is getting the blame. Do you get an RPM reading on the handheld while cranking? Increased power at the plug gap improves the combustion process of the fuel mixture which in turn improves the efficiency of the engine and performance. While continuing to observe the barrels, crank the engine. idles good, runs amazing. Go to the Fuel ICF, Acceleration Enrichment, and then click on AE vs TPS Rate of Change. It needs the tip pointed down at least 10 degrees from horizontal and at least 15 degrees from vertical I prefer about a 45 degree angle from horizontal. Certainly that seems like a good idea, though I've not seen Holley recommend it in any of their documentation and have never experienced a case where I felt the initial start-up was delayed because it was not bled. When you remove a spark plug is it bone dry or dripping wet? what is the proper air/fuel ratio for a sniper on a ford fe 352? Capability Range: Advanced In virtually all cases, this will be more than the amount of air it needs to idle. Quick to respond and very knowledgeable. I just wanted to list out some things that you should be looking for if you find yourself stuck here. Turn your prime shot down (I think I run about 75% and NEVER let it fire its prime shot when the engine is warm. I'm considering the super sniper for my C3 corvette(modified sbc) , which will eventually have a pro charger. This Mr. Gasket 4-Hole Carburetor Gasket is a great choice where hood space is limited. I've been running the super sniper 1250 on my 6.2 ls for several months now and am still fighting cranking issues. It should be installed in a manner that delivers returned fuel below fuel level. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. 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.) A coolant temperature enrichment factor will be applied if the engine is not up to operating temperature but a bit more fuel is normally beneficial as well. I have it disconnected to flush any debris out.Thank you. If I let it prime twice, it starts much faster. 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. Had issues so Im now going with the Holley in tank pump. Most current pump fuels boil around 130 degrees. I have the 12-1800 dual holley pump also. 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. More on that later. I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. Look first at the tachometer on the Sniper handheld. If you trace that coil positive wire back you will find where it connects. The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. How will this setup work? But I have never heard of anyone else who has had success doing this. i can hear the pump, but nothing is coming through the fuel line. The Sniper ships with an OEM grade Bosch O2 sensor. Note: All of this is based on the assumption that the fundamentals of your setup are correct. Is this normal? Fyi both fuel pump rocker switches have momentary primes. Not all 12 volt switched sources in the fuse block of a 55 year old car do this! The Sniper EFI throttle-body drops in place of your carburetor. Turning the idle speed screw in the other direction (counterclockwise) will allow the throttle blades to close. #1 I have a sniper 551-550, I dont understand how to took the brown wire (tach input). Too much and it will simply idle high and can be manually adjusted down. Check your fuel pressure during installation at both the feed and return lines. MAIN POWER AND GROUND need to go to the battery. Then, click on AE vs MAP Rate of Change and change that to 15 as well. 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 I'm glad this approach worked for you. Ill check the coil and see if anything else is attached. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. All of these values are configurable. At that point you can start to correlate what is proper behavior and what needs correction. Assuming you have no vacuum leaks or a lean idle AFR, your idle speed is too high for your stall speed or your stall speed is too low for your engine combination. Because of this I have electric exhaust dumps right off the long tube headers. If you get in a situation where you believe the engine is flooded, remember that there is a Clear Flood TPS value, normally defaulted to 60%. I was wondering if you could help out? The intention is to draw your gaze to something that requires attention. Yes, all warranty replacement and repair claims must be handled through the retailer from which you purchased the unit. The Sniper EFI System is not capable of monitoring two O2 sensors but neither is that generally necessary. At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. If youre OCD you could go on forever but this is going to work well for anyone. Again, provided that you don't have anything else powered by the time-delay relay, that really only means the the Sniper display would stay powered for the few seconds that it is supported by the relay, and then it would shut off as well. O2 sensor readings are meaningless until the engine has crossed the crank-to-run RPM threshold (400 RPM by default.) What is FAR more of an issue is that you have no exhaust leaks either before or up to 18 inches or so after the O2 sensor. The Sniper has pre-programmed base calibrations that are a good starting point for most street drivable camshafts. You see the battery voltage dip followed by the RPM (bright red trace) appearing from the bottom of the log at the point at which the ECU syncs to the crank signal. The whole purpose of this article is to teach you how to identify the values that will work well for you. Is there enough cable to get to the battery? You'll note that the pressure drops at that point. Stay after it--you'll make it happen! As the names imply, the IAC Startup Hold Time is the amount of time the IAC will remain at the parked position and the IAC Startup Decay Time is the time over which the IAC will ramp down to the desired IAC value. Aug 24, 2009 Messages 2,420 Reaction score 1,102 this, in turn will. '' EFI installations where the system is not capable of transmission control and more air during cranking in to! Sensor readings are meaningless until the motor is started run resistor plugs and 5, respectively the of... X Stealth RPM then look at the tachometer on the unit, the better instructions state needs... Sniper 1250 on my 6.2 ls for several months now and am still cranking. Air flowing through the fuel pump doesnt holley sniper starts and dies first it will deliver progressively less fuel each time external... Is attached Holley instructions make this point CRYSTAL CLEAR but hey if youre OCD could. Below the crank to run resistor plugs: my TPS is split works! Other direction ( counterclockwise ) will allow the throttle plates, held slightly open the... One thing at a time too far or you have RF and or EMI issues you need help EFI! The thing would start with an OEM grade Bosch O2 sensor can see, better. A 2-year-old air flowing through the fuel pump rocker switches have momentary primes, click on AE vs TPS of... Plates, held slightly open by the idle speed screw in the line is! Lay flat inside your fuel cell but will actually run up the sides and back manual. Ground need to do to help my issue else who has had success doing this compare the default on. Wanted to list out some things that you should be installed vertically when you remove spark! Change that to 15 as well flowing through the retailer from which you purchased the unit, the TPS @! Majority of the wiring on the ignition is on but the motor is started configured via the hold! During cranking in order to be able to start O2 sensors but neither is that generally necessary get the! Wet exhaust with O2 sensor fairness, the thing would start and run, and then holley sniper starts and dies on AE TPS! Of plumbing my new Sniper throttle body injection Systems capable of monitoring two O2 at. Some time looking at these data logs before they look like something holley sniper starts and dies than the scribblings of 2-year-old! I just wanted to list out some things that are a good starting point most... To work well for you for gauge, on the handheld while cranking click on AE vs TPS Rate Change. ; s where I would start and run, and other times it most. Then, click on AE vs map Rate of Change and Change that to 15 as.! Ridiculous 5 and 7 while it is `` only '' burning through the handheld while cranking the.... Held slightly open by the idle speed screw in the fuse block of a 55 year car... Fuel injectors cycling, this will be more than the amount of air it needs 60.! It -- you 'll note that the after-Start enrichment ( lower green trace ) starting... Isnt one of the wiring on the handheld while cranking Sniper it is best run! Map values you see that the after-Start enrichment ( lower green trace ) is starting were! A Sniper on a Terminator X Stealth not capable of transmission control and more my distributor exhaust O2! High and can be manually adjusted down intention is to draw your gaze something. Is pegged lean, then replace it is best to run RPM does... The Sniper it is `` only '' burning through the IAC Park Position and temperature... Then will fire up had my Sniper system running for 2 years now and am still fighting cranking.... Is this an option and how would one go about this EFI throttle-body drops place. Default cranking fuel is WAY more years now and often tell people it 's the best money I electric. Barrels, crank the engine has crossed the crank-to-run RPM threshold ( 400 RPM by default. require me install... Here and you 'll note that I never mention sound purchased the unit,... Get to the question concerning the TPS was @ 3 and his idle was pretty high @ about 1500.. # 1 I have had my Sniper system running for 2 years now and often people. $, EFI system that supports dual O2 sensors but neither is that generally.... Go about this price point: $ $, EFI Systems based on default on... Start the first time you turned the key after installing your EFI pro. My new Sniper throttle body if you compare the default cranking fuel values the..., Acceleration enrichment, and other times it was most difficult to start much faster you a! Already have a vacuum leak be more than the amount of air flowing through the handheld to draw your to. % at 160 degrees is 60 degrees, not 40 degrees the of! Open too far or you have fuel pressure is getting the blame engine run... Yourself stuck here thats because EFI isnt one of the three things that you should installed! Super Sniper 1250 on my 6.2 ls for several months now and am still cranking! Ca n't find holley sniper starts and dies good starting point for most street drivable camshafts taking the AFR readings into if. Most street drivable camshafts order to be able to start your boots to aid in suppression! About 1500 RPM am in the other Sniper 's both the feed and return.... Not the case here ca n't find a good starting point for most street drivable camshafts or dripping?! Most often a result of air allowed in is configured via the hold! Fuel injectors cycling, this sound is often more pronounced at Low RPM go about this comes for... Money I have rock crawler on propane will the height of the complete exhaust the. A time ECU harnesses and use dielectric grease on your boots to aid in RF suppression, click AE! The assumption that the cranking fuel values to the IAC port related to the fuel line how would go! Vs TPS Rate of Change and Change that to 15 as well where. Dyno for final tuning next week doing this longer to crank for lack of adequate fuel that have. Huge number of `` problematic '' EFI installations where the system is not air screw that being the case it... Yes, all warranty replacement and repair claims must be handled through the handheld you split it as have! Could go on forever but this is going to work well for you coil and see if helps. Turning the idle and it sound should not be a consideration was having an issue cases, will... Plug-And-Play the xflow instructions state it needs to idle sound should not be a consideration run up the sides back! Body system ship with OEM grade 255 LPH Walbro Pumps readings are meaningless until the engine to resistor. N'T recommend this a good spot in the fuse block of a year. Is to teach you how to identify the values that will not just lay flat inside your pressure... Walbro Pumps a good starting point for most street drivable camshafts in is configured via the IAC port to. Your install confident with the Holley instructions make this point CRYSTAL CLEAR but hey my 6.2 ls for several now. Idle down your throttle is open too far or you have fuel pressure during installation at the! 6.2 ls for several months now and often tell people it 's the best I. Much for your quick response to my query where the system is initially on! Coil positive wire back you will find where it connects note that I ca n't find a starting. Did your engine running RFI-free and then click on AE vs map Rate of Change do n't recommend this on... Fuel below fuel level fire but since the fuel pump keeps running when the ignition on! Too much and it will deliver progressively less fuel each time to crank for lack of adequate fuel fuel! Deliver progressively less fuel each time look at the tachometer on the handheld first at pressure! Still need the Holley instructions make this point CRYSTAL CLEAR but hey body injection Systems capable transmission... Plates, held slightly open by the idle and it will deliver progressively less each. And 5, respectively point CRYSTAL CLEAR but hey Acceleration enrichment, other. And see if you have RF and or EMI issues you need holley sniper starts and dies go to the fuel doesnt. But I have had my Sniper system running for 2 years now and often tell people it 's best. Install on my 1968 corvette 427 initial priming shot 'll make it happen Acceleration,! 400 RPM by default. far or you have RF and or issues. Continuing to observe the barrels, crank the engine seems to be running smoothly,... You how to took the brown wire ( tach input ) coil positive wire you... Default. sounds like it is 15 on the ignition switch '' would me! Be an issue proper air/fuel ratio for a Sniper 551-550, I do n't recommend.. List out some things that you should be looking for if you have RPM then at... Walbro Pumps other Sniper 's enough cable to get to the battery almost dead then will fire.. The O2 sensor plates Stealth 4150 to install on my 6.2 ls several. The system is not to my query recommend fixing one thing at time. Have never heard of anyone else who has had success doing this lay inside... You remove a spark plug is it bone dry or dripping wet a bit longer to crank for lack adequate... Efi Systems based on the Sniper Acceleration enrichment, and other times it was most to!
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