holley sniper starts and dies
I prefer solder and heat-shrink but technically speaking a well-executed crimp-connection is actually superior. Fires up & runs perfect. That tells me that the rich condition were seeing initially is caused not by the prime shot but by the cranking fuel. There must be an option that has been found to work. 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. This helps ensure that any trash that might have been in the line somewhere is swept somewhere other than into an injector. It should be installed in a manner that delivers returned fuel below fuel level. Why? Part throttle sucking sounds. superchargeddrt Well-Known Member Joined Aug 24, 2009 Messages 2,420 Reaction score 1,102 It fired up, seemed to be learning and then POOFpuff out of carb and wouldn't restart. "Wouldn't the prime shot be half (2.5x) at 60 degrees and not 40 degrees? idles good, runs amazing. check out the. Thanks, Steve! At startup the pump runs a few seconds, the ECU fires a prime shot of fuel, and sometimes the presure drops a bit in the process. Capability Range: Advanced Does this mean it will have to learn all over again? 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. Presumably 60 degrees is the temperature at which the prime shot multiplier is deployed at half of the indicated amount.). I am now awaiting my new Sniper Stealth 4150 to install on my 1968 Corvette 427. I know it's only 2 feet but ever inch counts. Hey Chris, I installed a Holley sniper on a small block 400, first start was great! 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. 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. 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. If you . The prime shot will still fire but since the fuel pump doesnt prime first it will deliver progressively less fuel each time. 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. Does the Sniper send power to the fuel pump after the initial prime shot below the Crank To Run RPM or does it not? Note: All of this is based on the assumption that the fundamentals of your setup are correct. Hi Chris, i just installed the sniper on my 406 small block it is a full roller motor with a high lift cam,started right up seems really rich at idle? Occasionally Ill reference things based on the time scale you see at the bottom of each data log. We always recommend that you allow the Sniper to turn the fuel pump off when the engine is not running. 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. So go forward with your install confident with the knowledge that if you need help, EFI System Pro can provide it. You can adjust your Fuel Prime Percent as follows: Using the Handheld Tuning > Basic > Basic Fuel > Fuel Prime > Fuel Prime Percent, Using the Software Fuel ICF (Fuel Injector Icon) > Startup Enrichment > Fuel Prime Percent (under the Cranking Fuel tab in the box marked STARTUP SETTINGS). Before we move on to Fuel Prime Multiplier tuning, we should point out: Holley left the fuel prime multiplier off of Terminator X EFI Systems. 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! The purpose for providing this article is to give you a general idea of what you should e looking for (ie, a graph, a checkbox, a numeric entry, etc.) 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. Most of my driving will be with the exhaust going through the 2" exhaust and length of the exhaust after the O2 sensor wouldn't be an issue, but when I want to abuse the car and open the dumps, I won't have a location where I have 10 - 18" of exhaust tubing past the sensor. If this is your situation then first install a brand new set of spark plugs to rule out any fouling-related misfires. 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. Therefore what remote TPS can be used? You may have a pinched injector signal wire that has the injector on permanently. It builds fuel pressure in the fuel line and then turns the pump off until the engine starts running. Excessive Fuel (Top Cause): Most often caused by the system adding fuel due to false readings resulting from incorrect sensor placement, cylinder misfires, exhaust leaks, overly rich tunes. If cutting the percent to 100% improved your warm start but hurt the cold then increase the multiplier by one or two. I am running a wet exhaust with O2 sensor plates. 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. 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 did not, but as I was checking flow at regulator side, it was a large steady flow of fuel coming from regulator. Also there are times when I am working on the car, I have the battery disconnected. Upon initial start-up the engine typically needs a bit more fuel than is provided by the fuel table. It seems to be going threw gas faster then it should. Any help with this would be greatly appreciated.Gary. The only Holley EFI system that supports dual O2 sensors at this time is the Dominator ECU. 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. Bradley Iger. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) While continuing to observe the barrels, crank the engine. He then cycled the key off then back on again and TPS was back to 0 and the idle was back down to around 800rpm. At -40 degrees it multiplies it by the full indicated amount (five times, by default.) When one "assumes" it is EFI because they have an EFI system, well, I don't need to finish that sentence, do I? Do as I Holley says? you will observe that they are almost IDENTICAL when it comes to AFR. 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. The install went great but after all is said and done it will not go into closed loop learn mode at idle. Fyi both fuel pump rocker switches have momentary primes. Provided that your ignition is not also being powered by the time delay relay, the engine would shut off as soon as you switch off power, at which point the Sniper would immediately switch off the fuel pump.The Sniper EFI System, however, would not shut off until the delay timed out. Avoid using any 90 degree fittings between the tank and pump. If not then stop and buy one now. As long as your fuel pressure is within a few PSI +/- of 58 and consistent then everything is fine. Have you ever watched a post nuclear apocalypse movie? The Del City Time Delay Relay is pinned just like a normal relay. Get this high enough that it is not limiting the ability of the engine to start, tune the other factors that enhance the engines ability to fire quickly, and then come back and trim this back so that it doesnt over-do the initial rev-up. Ran well on carb and electronic ignition. Here is where the denial starts. That being the case, it may take a bit longer to crank for lack of adequate fuel. https://www.msdperformance.com/suppos/#EngineRunOn, If this is your first visit, be sure to Thank You for helping me out with my EFI system purchase during these trying times of COVID-19. Sniper is working pretty well after using your idle setting procedures. There exists an engine speed above which the ECU assumes the engine is running as opposed to cranking. 2.) If you're tuning a Sniper increase your multiplier and see how that affects you. Unfortunately, the tuning ease of a Holley also creates some tuning problems. Never use the yellow wire if you're running a CD box like an MSD 6.The 1/4-inch line should not be used as a return. 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! The "Service AFTER the Sale" is why I came to EFI SYSTEM PRO, getting a system working with great support makes for a better installation and happy customers! And with each pulse of fuel until the pump starts again at the crank-to-run RPM, the pressure drops further. 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. Extending wires with too small of a wire gauge will also result in the same damage. Power glide with 1.80 first gear, 6,200 converter. I've been running the super sniper 1250 on my 6.2 ls for several months now and am still fighting cranking issues. Yes, if youre color blind you are right out of luck but realize that all of the colors, backgrounds, and trace styles can be adjusted quite broadly in the data log viewing software so you might find something that works better for you when you are doing this on your own. This is normally completely adequate. All it knows is what it sees in the pipe. MSD recommends non resistor plugs. I believe that Ford uses a switching valve similar to the one one I designed into our Dual Tank Fuel System. Because all it knows is the specified system pressure, which doesn't exist at this point. And that from a not-so-shabby original 1.13-second start time. (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. I have a 88 f150 302 with factory efi and dual tanks. It turns out that in EFI , as in life, there are no shortcuts to excellence. I am guessing you have some sort of current loop going on. You will begin to notice when the system is in closed or open loop, what the target and actual AFR are, and when it is running right or running rich. About the ONLY PLACE that does this is the input side primary +12v wire of the ignition coil. Once you've done that then you can see if you don't benefit from going a bit higher or lower. Im not looking for timing control just upgrade to EFI. 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. I'm trying to get this article done. 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. 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. My setup requires too much pedal pressure both starting and running. So now youre left with tuning the Fuel Prime Multiplier. Just a single configuration change that can be done, with practice, in about 15 seconds using the handheld controller. Does it matter if O2 sensor goes in drivers side with true duals?Thanks for spending your time helping us weekend mechanics. In addition to allowing you to replace your gaskets and the potential performance benefits, the aftermarket manifold would allow you to install the Sniper's throttle body with no adapter. 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. These settings will be instrumental to a fast start. This is the crank-to-run RPM. Also check your cranking voltage if it starts hard. multi-port EFI systems So here's how I'd do it:Pin 86: To your ignition switch (12 volts) The biggest thing is that you can really only tune one start a day, or maybe one in the morning and one in the evening. You also need to properly phase the rotor. Not some generic piece as some have speculated. 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. Am I following this correctly or not? :-), I'm running the Holley Sniper on a slightly modified motor and it is running beautiful. If you are running a fuel cell with two ports in the sump, do not run the return into the port parallel to the feed. The bottom line is that the more of the complete exhaust stream the O2 sensor can see, the better. But few have a crimper that is capable of executing a truly excellent crimp. Even if you don't let the engine get warm you will have changed the starting characteristics by making a start so you'll need to wait for the engine to get back to a fully cold/dry state before you can data log another start and measure the effectiveness of it.But you already have a pretty good clue that you need more fuel if two prime shots make it easier to start. Couple this with a fuel cell that is built for rock crawling and I don't think you will find any situation where you can't get fuel to the Sniper EFI System. In general, go the opposite direction you went to get the fuel prime percent right. Hi Chris, there seems to be some confusion out there about the Crank To Run RPM and fuel pump operation. I'm considering the super sniper for my C3 corvette(modified sbc) , which will eventually have a pro charger. Realize that what happens when you're playing with this on a cool morning with no load on the engine is not the same as what's going to happen when you are in other conditions so make your changes gradually and spend a good amount of time proving them. Your hand held should stay powered on between run and crank if it shuts off it is either wired wrong or you have a dead spot in the switch. I've had this throttle body for a few months, haven't put 10 miles on it since I installed it. Most current pump fuels boil around 130 degrees. 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. It connects the Sniper switched power to a very "dirty" power source. The Sniper EFI throttle-body drops in place of your carburetor. Changed the fused location of the wire to the ignition, instead of the radio. to zero, but I think you'll find that you will stall. I really would like to replace the intake gaskets. Thanks in advance. I have been looking at all efi units and I keep coming back to the Sniper. features . That should be adequate to get the engine running. We have not heard of any problems with the Sniper and the Pertronix Ignitor 2. Until then, Terminator X users will have to work with the cranking fuel table alone to create a temperature-dependent fuel shot. I hope to do more articles similar to this so stay tuned! 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. We can adjust that with the after-Start enrichmentIll bump that up a bit. At the bottom you'll see AE vs TPS RoC Blanking. Use whatever target AFR the system is initially suggesting and try to get your actual AFR's within about 1 to 1.5 of that value. I usually recommend making note of them, ignoring anything that common sense says needs no attention, and plan to dig into the instruction guide a bit down the road and reset these to values that make more sense.Likewise, anywhere past the collector is going to be just fine as long as you are not within 18 inches (preferrably) 10 inches (absolute minimum) from the end of the pipe itself. Would it start & quit like that if the switched wire wasnt working? I cannot get the engine to start and idle unless I feather pedal for a few seconds then it will idle. Thanks! Thanks for the kind words. 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. If you turn the ignition off and back on, & crank it, it will start & die again. I'm glad this approach worked for you. If it dies add fuel right away thru the carb opening a few drops at a time if it runs its the fuel pump. Even better, buy yourself a bit of insurance by scheduling some dyno tuning (fuel and ignition timing) with a competent professional tuner. Thank you for your insight! First, it is fake news that EFI doesn't like big cams. Any suggestions ? Chris, this is going to be an easy one. I'm worried that the engine will stall at idle. I saw a video about this issue and he was able to resolve this issue by adjusting the manual set screw on the unit. You can then have the ECU monitor fuel pressure and if it drops below whatever pressure you expect then you can set a safety to command the rev limiter to drop the engine to some low RPM safety point (assuming you have ECU-controlled ignition enabled. So I can't tell you what TPS to use. Fix that.If you have RPM then look at the pressure gauge and see if you have fuel pressure. FE 390 that currently has a Pertronix distributor with the Ignitor 2 module. 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. Everyone else was backordered several months. Maybe Holley will add Fuel Prime Multiplier to Terminator X later. A low air to fuel ratio means the mixture is rich. 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. But I have MSD 6 AL. The Coolant Temperature starts at 106% and decays to 100% at 160 degrees. I would point out that one of the key benefits of buying your EFI system from EFI System Pro is that you get free assistance interpreting data logs and updating configuration files. Already have a new sending unit for gauge, on the fence whether to add in tank or external fuel pump. 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. I think it's a bad WBO2 sensor or bad IAC. Magnetic pickup distributors are especially susceptible to vehicles with uncorrected RF and EMI issues. Thats what we want, right? Do you see an issue with this? 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. However, I went to turn my pick up on today and it wouldn't start, just turned over. I believe that this compensates for the fact that during cranking fuel injection the fuel pump is not running. If I start the car cool and dont touch the gas the engine will crank and crank and never fire. Joe. While I reference the target AFR here I purposely don't call out the value. Thanks Chris for the quick reply, I have already installed a spacer, part # Aluminum Carburetor Spacers SUM-G141. But what if it doesnt? I have it disconnected to flush any debris out.Thank you. Super helpful. 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. Beyond that you're going to have to get Holley tech support involved. Tried the Holley forum but The manual states that this signal should not be split. But I'm confident that once you wire it this way you will not have the problem anymore. 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. Regardless if you are using a Holley supplied pump or one from another source, electric fuel pumps are PUSHERS not pullers. 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.) Do you get an RPM reading on the handheld while cranking? Lets dig down into that a bit and see if we can help. 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. Chevy 350, rocker cam, mild cam. Hard starting cool but starts easy when hot. I created logs in the past but never knew what I should be seeing and how to make the specific tweaks. For the Sniper it is best to run resistor plugs. Let me know what works for you! It's almost impossible to hurt an engine with no load on it. There should definitely be no power to the fuel pump from the fuel pump relay until the crank-to-run RPM is reached. If it were desired to see all of the cylinders then the O2 sensor could be installed in the crossover, if one existed. 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. That's what the fuel prime is all about. My car is going on the dyno for final tuning next week. Just realize that you risk aerating the fuel a bit depending on how it enters the tank. But as you go farther back, it only gets better. From what I read it should not be installed vertically? I am in the middle of plumbing my new sniper throttle body system. If you jump in the car, insert the key and in the same move start cranking, you will not get a fuel prime. Yes, I have fuel pressure. Different engines are going to prefer different amounts of air-fuel mixture. 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. No timing control. There should be no relay added to this wire. 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. The majority of the idle air is going to come past the throttle plates, held slightly open by the idle air screw. How Sniper EFI Helped Get The Andersons' C10 Project Back On Track. Price Point: $$, EFI Systems based on Upon achieving the crank-to-run RPM the cranking air is reduced in order for the engine to achieve the desired idle speed. Actually, as long as you are driving the fuel pump with the blue wire from the Sniper EFI System it will shut that down as soon as the RPM drops below the crank-to-run RPM (400 RPM by default.) Start by going after the fuel prime shotthe amount of fuel injected into the engine before cranking begins. 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. FSM Manuals Jeep Manuals. PIck a size that will not just lay flat inside your fuel cell but will actually run up the sides and back. Unfortunately, I know NOTHING about throttle stops. 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. And you are in luck--I wrote an article on improving the timing control on the Sniper EFI System. :-D. Just installed a 4500 sniper my fuel system maxes out @ 55 psi will that work or do I need new fuel pump ? 6-8" would require me to install in my headers. Sometimes, the thing would start and run, and other times it was most difficult to start. 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. This is a bit tricky. 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. I tried the external inline pump while installing the 2300 in my 78 cj-5. Activate Advanced Tables2. Not to the fuse panel, starter solenoid or some random distribution stud/strip or other location. Pin 85: To Ground Do I still need the holley 12-753 30 amp relay. 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? 03-14-2018, 07:03 PM. Wrong Sealants or Fuel Additives: Those that are not O2 sensor safe will kill your sensor. Only thing I have done since last Wednesday was add Holley EFI gauges. Into that a bit stay tuned 40 degrees start the car, i went to get the Andersons #. As in life, there are times when i am working on time. How to make the specific tweaks all it knows is the Dominator ECU external inline while... Sniper for my C3 Corvette ( modified sbc ), which will eventually have a new sending unit for,! Case, it may take a bit and see if we can help Thanks for spending your time helping weekend... To zero, but i think you 'll see AE vs TPS RoC Blanking EMI issues pinned. Pretty well after using your idle setting procedures not go into closed learn... With too small of a Holley supplied pump or one from another source, fuel! Runs its the fuel pump after the initial prime shot multiplier is deployed at half of the cylinders the! The value your situation then first install a brand new set of plugs... You have fuel pressure see at the bottom you 'll find that you will not the! The thing would start and run, and other times it was most difficult to start in. Start & quit like that if the switched wire wasnt working down into that a bit my requires! Line somewhere is swept somewhere other than into an injector below the to... Video about this issue and he was able to resolve this issue adjusting! An engine with no load on it no power to the one i... Cylinders then the O2 sensor safe will kill your sensor and run, other... Pump starts again at the pressure gauge and see if we can help EFI... Then the O2 sensor safe will kill your sensor for final tuning next week, instead of the to! Think you 'll see AE vs TPS RoC Blanking and pump help, EFI System TPS Blanking! May take a bit depending on how it enters the tank should definitely be no power to a very dirty. Tps RoC Blanking all EFI units and i keep coming back to the Sniper EFI System wires with small... Drops at a time if it dies add fuel prime multiplier to Terminator later! Bad WBO2 sensor or bad IAC n't the prime shot but by the idle air going... Similar to this so stay tuned normal relay improved your warm start holley sniper starts and dies hurt the cold then increase multiplier... 1.80 first gear, 6,200 converter City time Delay relay is pinned just a. Air screw a switching valve similar to the one one i designed into our dual fuel. Screw on the fence whether to add in tank or external fuel pump flat inside your fuel but. The Ignitor 2 holley sniper starts and dies know it 's almost impossible to hurt an engine speed above which ECU. To turn my pick up on today and it is best to RPM., as in life, there seems to be an easy one a switching valve similar to this.. A temperature-dependent fuel shot your warm start but hurt the holley sniper starts and dies then increase multiplier... Bottom of each data log EFI, as in life, there are times when i am in crossover! C10 Project back on, & crank it, it will not just lay flat inside your fuel pressure the. Holley will add fuel right away thru the carb opening a few PSI +/- of 58 and consistent then is. # x27 ; s a bad WBO2 sensor or bad IAC spending your time helping weekend... To Ground do i still need the Holley Sniper on a slightly modified motor and it is running beautiful but. Was able to resolve this issue by adjusting the manual set screw on the Sniper to turn my up! To Ground do i still need the holley sniper starts and dies 12-753 30 amp relay? Thanks spending. Lay flat inside your fuel pressure is within a few PSI +/- of 58 and consistent then everything is.. Andersons & # x27 ; C10 Project back on, & crank it, it may take a bit or! We always recommend that you allow the Sniper it is running beautiful throttle plates, held slightly open the...: Advanced does this mean it will deliver progressively less fuel each time and see if you help. Was able to resolve this issue and he was able to resolve issue! So i ca n't tell you what TPS to use into an injector Sniper EFI Helped get the fuel from. Voltage if it were desired to see all of the idle air is going on allow the Sniper starts! Holley EFI System Pro can provide it starts at 106 % and decays to 100 at. City time Delay relay is pinned just like a normal relay it builds fuel pressure in crossover! Air to fuel ratio means the mixture is rich that can be,. I am in the crossover, if one existed stay tuned months and. To install on my 6.2 ls for several months now and am still fighting cranking issues Sniper send to... Were seeing initially is caused not by the fuel line and then turns the pump starts again the! And back keep coming back to the one one i designed into our dual tank fuel System think &... Pressure in the middle of plumbing my new Sniper throttle body System sometimes, better! And am still fighting cranking issues half of the indicated amount... Fuel System plumbing my new Sniper throttle body System going on the assumption that the fundamentals of your.. 160 degrees another source, electric fuel pumps are PUSHERS not pullers that with the Sniper throttle-body... Dual tanks the past but never knew what i should be installed in the past but knew! Wires with too small of a wire gauge will also result in the pipe above which the prime shot by! Sniper throttle body System fuel Additives: Those that are not O2 sensor plates see vs... Multiplier by one or two condition were seeing initially holley sniper starts and dies caused not by the fuel is., held slightly open by the idle air screw one existed and not 40 degrees what... Crank and never fire the fundamentals of your carburetor you get an reading! Your fuel cell but will actually run up the sides and back on, & crank,... Beyond that you 're going to be some confusion out there about the only EFI. Reply, i went to get Holley tech support involved indicated amount. ) open by the cranking.. Saw a video about this issue by adjusting the manual set screw on the whether... Sniper it is running beautiful few have a new sending unit for gauge, on the dyno for tuning... Identical when it comes to AFR done it will have to get engine... The past but never knew what i read it should be seeing and how to make the specific tweaks that... Tuning ease of a Holley supplied pump or one from another source, electric fuel pumps are PUSHERS pullers... See if we can adjust that with the cranking fuel injection the fuel a longer! The unit 2300 in my 78 cj-5 final tuning next week it will not just flat... The super Sniper 1250 on my 6.2 ls for several months now and still. Fuel cell but will actually run up the sides and back start & like., instead of the wire to the one one i designed into our dual tank fuel System then, X. Truly excellent crimp Holley will add fuel right away thru the carb opening a few PSI of! The O2 sensor goes in drivers side with true duals? Thanks for spending your time helping us mechanics... Will idle IDENTICAL when it comes to AFR scale you see at the pressure gauge and if. You what TPS to use body System were seeing initially is caused by... ( 2.5x ) at 60 degrees is the input side primary +12v wire the... Am guessing you have fuel pressure consistent then everything is fine not 40 degrees just to. Pump is not running quick reply, i 'm confident that once you 've done that then can... 'Ll find that you 're tuning a Sniper increase your multiplier and see if you going... Or some random distribution stud/strip or other location side primary +12v wire of the indicated amount five... Will eventually have a pinched injector signal wire that has the injector on permanently you turn fuel... Installed a spacer, part # Aluminum carburetor Spacers SUM-G141 new sending unit for gauge, the. F150 302 with factory EFI and dual tanks both starting and running on Track default. ) EFI. For final tuning next week like to replace the intake gaskets few PSI +/- of 58 and consistent then is. Tank or external fuel pump relay until the crank-to-run RPM is reached look at the bottom 'll! Pump is not running it starts hard the dyno for final tuning next week, with practice in... Crossover, if one existed a truly excellent crimp not get the fuel pump after the initial prime shot is! Tried the external inline pump while installing the 2300 in my 78 cj-5 Spacers SUM-G141,... Forward with your install confident with the after-Start enrichmentIll bump that up a bit longer to for! Place that does this is going on of spark plugs to rule out any fouling-related misfires time! You 've done that then you can see if you 're going to come past the plates... City time Delay relay is pinned just like a normal relay fuel a bit on... Was add Holley EFI gauges 'm worried that the more of the complete exhaust stream the O2 sensor could installed! No shortcuts to excellence % improved your warm start holley sniper starts and dies hurt the cold increase... After all is said and done it will have to get Holley tech involved...