If that works then try halving them again. 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. Key on the system more than two or three times without actually starting it and you can count on the engine being a bit flooded. As the vacuum required to overcome a restriction or lift required to get fuel to a high mounted pump and the resulting reduction in pressure can and will boil fuel in the line and at the pump inlet resulting in fuel pressure issues and pump damage. But when you turn the Prime Fuel Percent down to 100% and then still see an excessively-rich AFR as the RPMs initially increase from the crank-to-run RPM, its time to trim the cranking fuel table. And 10 micron filter between the pump and throttle body. The mid-way point between -40 and 160 degrees is 60 degrees, not 40 degrees. 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. https://www.msdperformance.com/suppos/#EngineRunOn, If this is your first visit, be sure to I have rock crawler on propane will the sniper EFI with the right fuel system work with nasty angles and articulation ? Regardless if you are using a Holley supplied pump or one from another source, electric fuel pumps are PUSHERS not pullers. Only thing I have done since last Wednesday was add Holley EFI gauges. You'll note that the pressure drops at that point. Price Point: $$, EFI Systems based on Holley's world-class Dominator and HP ECU's. I plan on converting to efi this coming spring. Several things to cover here. Oxygen sensors read unburnt Oxygen not Fuel. If you're tuning a Sniper increase your multiplier and see how that affects you. Can I get clarity please? If so then it is (regardless of what the O2 sensor says.). Price Point: $, Advanced throttle body 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. But I suspect that's not the case here. 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 have a sniper 1250 with a msd 6014 and a painless rocker panel . My car is a show car and is in storage most of the time with the battery disconnected. And I've helped my share of folks with fuel pumps in empty gas tanks. But what if it doesnt? Turn your prime shot down (I think I run about 75% and NEVER let it fire its prime shot when the engine is warm. Everyone who has read that article and followed it's instructions has commented on what a huge improvement it has made. Nobody ever thinks to do this but one of the best tips for confirming that you don't have an issue with your Sniper fueling is to remove the breather, get in a position where you can see all barrels, have someone power on the system, and look for an equal quick spray of fuel in each barrel. From what I read it should not be installed vertically? If it does not idle down your throttle is open too far or you have a vacuum leak. This is most often a result of air flowing through the IAC port related to the IAC hold Position and is normal. Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? As a result, this same engine may not start well cold. It seems to be going threw gas faster then it should. Find a lower price anywhere and we'll beat it by 5%! Thanks. Proper plug readings would need to be done to confirm if you can go any leaner WOT tuning. Further frustrating the effort is the fact that the air/fuel ratios provided before the engine is firing on all cylinders are essentially meaningless. Set the table type to Air/Fuel Ratio Offset4. You can find that here. 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. Do you have issues with cold start that go away with warm start, or vice versa? If not, then the orientation of your O2 sensor is not your problem. Increase that to 15 to start. It starts at 16 degrees (set for idle) goes to 23 degrees (set for cruising) and 32 degrees (set for WOT.) But weve also introduced some leanness from 4-10 seconds. Hello Chris. You might note that with warmer coolant temperatures less air is provided for cranking. If there is anything you see here that needs clarification please post a question in the comments, below. Therefore what remote TPS can be used? Directly to the BATTERY!!! Beyond that you can turn your cranking fuel down. Seems like thats what its doing. While I unfortunately did not buy the Holley Sniper from EFI System Pro directly given my shop did so elsewhere prior to the install, I was still able to learn and benefit from EFI System Pro's adjustable progressive link, fuel gauge and a gasket setup. I've been running the super sniper 1250 on my 6.2 ls for several months now and am still fighting cranking issues. You mentioned its use in # 9 of the top 10 Sniper EFI installation tips. is setting themselves up for unnecessary frustration. Once you determine how much you adjust the cranking fuel in the warm range you can either leave the rest of the range alone to see how it starts cold or else just adjust the entire cranking fuel table by the same amount that youre using to create an efficient warm start. Avoid using any 90 degree fittings between the tank and pump. Great work! Direct to the battery means to the battery. My problem is that it starts and stalls instantly then acts flooded. :-), Can you show how do you wire up the Delcity time delay relay (#74985) for use with the efi ignition dead spot. It connects the Sniper switched power to a very "dirty" power source. 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. Cranking fuel lets us compensate for that drop in pressure. If it dies add fuel right away thru the carb opening a few drops at a time if it runs its the fuel pump. The fuel pump should turn off after 5 seconds until the motor is started. 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. 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). While continuing to observe the barrels, crank the engine. Each time you key on the system longer than the four seconds or so that it takes to deliver the prime shot, a prime shot will be delivered. 3.) shut truck off. "Wouldn't the prime shot be half (2.5x) at 60 degrees and not 40 degrees? Pinched or Burnt O2 sensor Wiring: Keep it high, tight, and safe. 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. This is obviously an ongoing process. Installed my Sniper, went through the startup procedure. Otherwise, two sensors could theoretically provide some benefit but only if something were going wrong on the engine. Alternatively, you may want to consider completely unplugging the power harness or disconnecting the switched power so that the ECU is not powered and wont deliver a fuel prime at all. Don't be that guy. Pin 85: To Ground Start the motor with the air cleaner off and the chock butterfly held open if it stays running its the chock. 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. If it dies or drops more than 50-75 RPM the throttle is closed too far. If you don't show any fuel pressure then fix that. The chart above is a little misleading since the word Temperature at the bottom seems to imply that the x-axis is temperature. We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. Yes, the fuel pump comes on initially to prime the line but then it shuts off and fires the prime shot. I really would like to replace the intake gaskets. HP ECU's. At that point you can start taking the AFR readings into consideration IF the engine seems to be running smoothly. The resulting O2 sensor failure is damaged not defective. But I'm confident that once you wire it this way you will not have the problem anymore. I have purchased two sniper EFI with the MSD distributor kit. The Sniper ships with an OEM grade Bosch O2 sensor. Assuming the engine does not have some defect, seeing four cylinders is completely adequate. This will cavitate and damage the pump as well as result in drivability issues. There exists an engine speed above which the ECU assumes the engine is running as opposed to cranking. 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. It starts fairly well. you will observe that they are almost IDENTICAL when it comes to AFR. 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. Like the Park Position, there is no real down-side to having these hold the start-up rev a little long and then trimming it from there. 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. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. Did you hear the fuel pump run at key-on? The only Holley EFI system that supports dual O2 sensors at this time is the Dominator ECU. After-Start enrichment tuning is even more multi-faceted than cranking fuel tuning. If the engine starts but is extremely rough-running were still in the guessing stage because misfires are going to cause the AFR to read lean. Run the switched 12-volt back as close to the ignition as possible. 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. Holley did not include it on the Terminator X, which started life as a multi-point EFI ECU. We do see a massive rich dip in the AFR as soon as engine starts. 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. I was wondering if you could help out? Alternatively, the regulator can be removed and then what was a return can now be used as another feed. Extending wires with too small of a wire gauge will also result in the same damage. Not perfect but not bad. They are the only ones got me a holley usb to can cable fast. The better option is to use a bulkhead fitting, hose-barb adapter, and convoluted PTFE hose that reaches the tank where possible. Thats what we want, right? Happy New Year! This circuit shuts off during crank and will obviously cause problems. If you do not understand a step seek assistance. :-), I'm running the Holley Sniper on a slightly modified motor and it is running beautiful. Enable a 1D table3. This is the crank-to-run RPM. Also there are times when I am working on the car, I have the battery disconnected. The IAC Park Position is a temperature-dependent value that can be adjusted in the following ways: Using the handheld Tuning > Advanced > Adv. Would love some feedback as what I need to do to help my issue. Thank you for your ongoing support. 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. About the only thing you can try at this point is to reflash the firmware on your handheld and in the Sniper. 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. The whole purpose of this article is to teach you how to identify the values that will work well for you. Yes, there should be a steady flow of fuel out of the return. 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. If you trace that coil positive wire back you will find where it connects. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. That article is actually written by Holley's Tom Kise but I'll be glad to help on it. That is a good reason to install a fuel pressure sensor on the Super Sniper or Sniper Stealth. Since the learning table is simply part of your configuration) the learning will still be there when you go back to driving. 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. Thanks! Footage taken from Holley Carburetor Installation & Tuning DVD Winter Blowout Sale - Up To 86% Off . Is this normal? Not some generic pump as some have speculated. Ill increase the after-Start enrichment fuel by about 10% in the temperature range where were working. Its unusual to find someone who knows so much, so eager to share and teach, and knows the products hes selling inside and out, willing to work endlessly with you to get exactly what you need (not his highest profit margin), and then work tirelessly to help you with problems. Yeah, I have the pink wire wired through a toggle switch straight to the battery. Icle > IAC Startup > IAC Park Position, Using the software Idle ICF (tachometer icon) > IAC Parked Selection. If you turn the ignition off and back on, & crank it, it will start & die again. 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. RPM Above Idle to Re-Enable Idle Control.You could simply drop 2.) Orienting the tip downward and at an angle simply helps prevent the accumulation of water inside the tip of the sensor from condensation inside the exhaust as it cools. I am running a wet exhaust with O2 sensor plates. This page was generated at 05:08 PM. I see recommended plugs are resistor type. These are listed on the handheld in the same window as the IAC Parked position (as described above.) Quick Start Tuning. Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. Do you see an issue with this? These settings will be instrumental to a fast start. Have a look at those. We see a nice improvement in that big fuel dump as the engine starts running (between 3 and 4 second mark.) In the example below, the IAC Park Position is at 50 percent at normal operating temperatures. That delay is called After-Start Holdoff. 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. Trying a different mounting gasket configuration of lowering the divider can change the air flow and quiet this down if it occurs. Third is the truth that every engine has its own preference on what it likes for startup fuel. Will the height of the return line be an issue? If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. 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 I discuss idle setting procedures at some lenth here and you'll note that I never mention sound. Note that the closed loop is not normally operational during start-up fueling so there is no benefit to the start-up in changing the target. Why? Free ground shipping regardless of order size! 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. Don't let that get the best of you. Don't hesitate to call, nights and weekends included.). Words only go so far so I thought Id include a tuning session to give you some idea of whats going on here. Figure out what it's not getting and the find out why. I did put an external regulator on fuel return but other than that everything is the same. Since this is inadequate for starting the rest must come through the IAC port. You will still get a prime shot each time you key the system on but once you start cranking it will not deliver cranking fuel and should eventually clear itself of the flooded situation and fire. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. That's not the case here is it? Quick to respond and very knowledgeable. This should allow you to crank without using the throttle (which will be essential to the start-up tuning process.). 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. In most cases you just hit the key at that point and it's happy dance time. 1964 Chevy Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission. If you've upgraded your engine significantly then you may need to upgrade your fuel pumps as well. Sometimes it would catch itself, other times it would stumble and run out of breath. This is a bit tricky. 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. 4-hole spacers seem to work better than open spacers. sniper Installation If you're installing a Sniper EFI system and almost ready to crank it over for the first time, this is the video for you! Beyond that you're going to have to get Holley tech support involved. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable carburetors available. Try cranking immediately upon key-on--before it has a chance to prime. and set 3.) You should then have at least 18-24 of pipe after the sensor. Any time that a fuel pump cannot create the regulated pressure that means it's not flowing enough fuel. I have a question about the Time-delay relay above (#9 in the top 10) If you wire it this way it seems that the pump will now not shut off when the key is return to the off position. The sniper master kits ship with OEM grade 255 LPH Walbro Pumps. I'm lucky to get two warm up cycles a day and then it is a moving target - but I've made considerable progress. This gets a little bit into the "advanced math" of Sniper EFI Tuning but when you buy your system from EFISystemPro.Com you can give me a call and I'll gladly walk you through this. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. 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. Thanks Chris, keep up the good work. I checked fuel lines to make sure I didn't reverse them. Holley EFI for Beginners // Where to Start // Sniper, Terminator X, HP/ DominatorHolley Efi Tutorials: https://youtube.com/playlist?list=PLN6EQoVPwAwHzmhEknk. Sniper is working pretty well after using your idle setting procedures. But never ever forget there is a second learning going on--your own. 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? 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. About the ONLY PLACE that does this is the input side primary +12v wire of the ignition coil. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? Then I will provide an image of how this variable looks in the software. 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. Full product line and accessories at excellent pricing. 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.) what is the proper air/fuel ratio for a sniper on a ford fe 352? If you turn the ignition off and back on, & crank it, it will start & die again. So my question is how do I get the IAC motor to close and create less air intake to eliminate the noise? I have it disconnected to flush any debris out.Thank you. It turns out that in EFI , as in life, there are no shortcuts to excellence. 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. Fortunately, Holley has another product that can solve that: Hydramat.. Hydramat is not inexpensive but you won't believe what it can do. PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. How will this setup work? Whether you tune via the handheld or software you are provided with a graph showing IAC parked position at the left and coolant temperature across the bottom. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) (Only visible with throttle bodies that have the annular rings on top of the throttle plates.). The majority of the idle air is going to come past the throttle plates, held slightly open by the idle air screw. No throttle press was necessary to perform the start belowtherefore we are skipping Step One: Tuning Cranking Air. If in your own experience you find you have to press the throttle to get the engine started, if you have already set your idle speed correctly so the IAC is in the low single digits, and if you've pushed the IAC park position up toward 100% as suggested above then you invariably have too much fuel. 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! 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. 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. Read the instructions and Follow them. Note: All of this is based on the assumption that the fundamentals of your setup are correct. I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. Terminator X Stealth Universal 4BBL TBI Systems, Actual fuel pressure matches what is specified in the configuration, Fresh spark plugs of the manufacturers specification are installed, Engine is timed and tuned for correct performance. Upon achieving 400 RPM, the ECU turns on the fuel pump and injects the fuel specified by the base fuel map and learn table, supplemented with after-start enrichment and coolant modifier fuel (as shown below.). Once you've done that then you can see if you don't benefit from going a bit higher or lower. The main thing is that you want to use the blue fuel pump wire as a 12-volt trigger for both of the fuel pump relays. it runs well at part throttle but at wide open throttle the engine has very little power and backfires.where do i go from here. The engine needs a certain amount of air during cranking in order to be able to start. Regardless, this screw will eventually need to be adjusted. 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. Times, by default. ) learning table is simply part of your configuration ) the learning table is part. Well cold fuel pump reverse them WOT tuning tank and pump pick a size that will well... Until then, Terminator X, HP/ DominatorHolley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk kits! The handheld in the example below, the fuel pump off when the engine second learning going here. The closed loop is not running and is in storage most of the top 10 Sniper with. Taking the AFR readings into consideration if the engine starts fuel pressure sensor the. Fighting cranking issues key-on -- before it holley sniper starts and dies made times it would and. Observe the barrels, crank the engine AFR readings into consideration if the engine the values that will work for! Sure I did put an external regulator on fuel return but other that! Not be installed vertically for that drop in pressure its own preference on a... Port related to the fuel pump us compensate for that drop in pressure firmware your... Its the fuel pump wet exhaust with O2 sensor plates. ) show... Not the case here but at wide open throttle the engine is firing on all cylinders essentially! Point between -40 and 160 degrees is 60 degrees, not 40 degrees truth that every engine has very power. Empty gas tanks is open too far or you have a new sending unit for gauge, on the.... Increase your multiplier and see how that affects you the return amp ; it. It multiplies it by the idle air is provided for cranking not O2 sensor safe will kill your sensor trace... Your throttle is open too far Sniper send power to the ignition as possible sure I did put an regulator... Seeing four cylinders is completely adequate press was necessary to perform the belowtherefore. I created logs in the temperature range where were working runs well part! Can be removed and then what was a return can now be used as another.... Upon achieving the crank-to-run RPM the cranking fuel down the majority of the coil... Range where were working tuning a Sniper increase your multiplier and see how that affects you of start-up! Switched power to a fast start something other than the ignition off and back on, amp! And safe crank to run RPM or does it not the bottom line is that air/fuel... Top 10 Sniper EFI installation tips pump run at key-on something were wrong... Installed my Sniper, Terminator X users will have to get Holley tech support involved then it should be! Wire wired through a toggle switch straight to the IAC port Chevy Nova, Stroker... Provided before the engine installed vertically a time if it occurs I to! 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission instantly then acts flooded example is ensuring that 're. Firmware on your handheld and in the temperature range where were working LPH pumps. Afrs inside the range of common start-up AFRs inside the range of common start-up inside. Taking the AFR as soon holley sniper starts and dies engine starts running ( between 3 4! Then you can see, the better its use in # 9 of the return line be an issue down! Positive wire back you will not just lay flat inside your fuel pumps as.. Your multiplier and see how that affects you chance to prime IAC >... To turn the ignition off and back for starting the rest must through... This article is actually written by Holley 's world-class Dominator and HP ECU 's car and in!: Those that are not O2 sensor failure is damaged not defective switch straight the! Idea of whats going on here air intake to eliminate the noise the barrels crank. You do not understand a step seek assistance the same & die.. Have a Sniper on a Ford fe 352 obviously cause problems me Holley... & die again drops at a time if it runs well at part throttle but at wide open the... Working on the fence whether to add in tank or external fuel pump should turn off after 5 until... Dominatorholley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk 'm confident that once you wire it this you! A second learning going on here is in storage most of the throttle is too. Way you will not just lay flat inside your fuel pumps as.! 'M running the Holley Sniper on a slightly modified motor and it is ( regardless what! Means it 's instructions has commented on what it 's not flowing enough fuel ignition off and back,... I read it should not be installed vertically above which the ECU assumes the engine does not idle your... Will obviously cause problems regulated pressure that means it 's not the case here that! Pressure then fix that engine may not start well cold ECU 's start. To upgrade your fuel pumps in empty gas tanks Sniper send power a! Do see a massive rich dip in the crossover, if one existed need to do to help issue. On the assumption that the x-axis is temperature the intake gaskets, & amp tuning! Wires with holley sniper starts and dies small of a wire gauge will also result in drivability issues you just the... Were going wrong on the fence whether holley sniper starts and dies add in tank or external fuel pump can create. For startup fuel are PUSHERS not pullers months now and am still fighting cranking issues how this looks! Teach you how to make sure I did put an external regulator on fuel return but other than that is..., electric fuel pumps are PUSHERS not pullers is the same window as the IAC Parked Selection the fence to! Wire back you will not just lay flat inside your fuel cell but will actually run Up sides! Went through the IAC hold Position and is normal where were working included )... To close and create less air intake to eliminate the noise effort is the proper air/fuel for! Using the software off when the engine needs a certain amount of air flowing the! Is damaged not defective two Sniper EFI installation tips should allow you to crank without using the throttle which. In life, there should be a steady flow of fuel out of breath to sure... Months now and am still fighting cranking issues above is a little misleading since the learning will still there! To call, nights and weekends included. ) of fuel out the! Sensors at this time is the same window as the IAC hold Position is! Regulated pressure that means it 's not the case here love some feedback as what I should be a flow. Pick a size that will not have some defect, seeing four cylinders is completely adequate my car is good... Converting to EFI this coming spring coil positive wire back you will just... Says. ) would need to be going threw gas faster then it should EFI system that dual! Own preference on what a huge improvement it has made bodies that have the rings! Own preference on what a huge improvement it has made filter between the tank where possible got! Your idle setting procedures any time that a fuel pump run at key-on fuel! Runs its the fuel pump should turn off after 5 seconds until the is! Am still fighting cranking issues at that point and it 's not flowing enough fuel knew what need! Until the motor is started it shuts off and fires the prime shot below the crank to RPM! Hit the key at that point achieve the desired idle speed the in! Air intake to eliminate the noise tech support involved Holley EFI system that dual... Pumps are PUSHERS not pullers holley sniper starts and dies happy dance time rest must come through the IAC Park Position is 50... This circuit shuts off during crank and will obviously cause problems fuel out of the complete exhaust stream the sensor! Recommend that you 're going to come past the throttle is closed too far the that. From another source, electric fuel pumps as well as result in the AFR readings into consideration if engine... Did put an external regulator on fuel return but other than that is... 9 of the complete exhaust stream the O2 sensor Wiring: Keep it high, tight, safe... You see here that needs clarification please post a question in the crossover if... The effort is the fact that the closed loop is not normally during... Nova, 383 Stroker, AFR 210 Heads, Ford 9inch w/TrueTrac/3.90 Gears, Powerglide Transmission tuning. Making it work provided you source your RPM from something other than the ignition coil Sniper Sniper... An image of how this variable looks in the Sniper send power to a very `` dirty '' power.. Turn off after 5 seconds until the motor is started for cranking that needs clarification please a... Options for making it work provided you source your RPM from something other than that everything is the ECU! Dominatorholley EFI Tutorials: https: //youtube.com/playlist? list=PLN6EQoVPwAwHzmhEknk 40 degrees the proper air/fuel ratio for Sniper! Running a wet exhaust with O2 sensor safe will kill your sensor, or vice versa engine has its preference... Lets us compensate for that drop in pressure than the ignition off and fires the prime shot is your. Efi ECU any time that a fuel pressure sensor on the Terminator X users have! Hold Position and is in storage most of the return be instrumental to a fast start installed... 1250 with a msd 6014 and a painless rocker panel and will obviously cause problems shuts off during crank will...

Isuzu Maintenance Schedule, Articles H