Holley Sniper Runs For 30 Seconds Then Dies. They're simple and free to fix! The Basically it starts and

They're simple and free to fix! The Basically it starts and runs for about 15 to 20 seconds then the AFR starts wildly changing and running high 30s to mid 50s and the engine dies. 90. … I have the 1935 Hot Rod truck with a 306 small block ford with the Holley Sniper EFI from Blue Print Engines. Holley Sniper EFI troubleshooting can seem daunting, but understanding key issues simplifies the process. Pay specific … Got the basic Sniper for my 68 340, with the OEM style fuel module sending unit/fuel pump from Holley. Since it got cold (below 50°F), when I start my car every few weeks it runs for a few minutes then stalls out. Many EMI/RFI issues will cause a reset of the Sniper computer and I didn't see that in your datalog, it appears to just … Are your morning drives being ruined by a temperamental Holley Sniper EFI system? Those mysterious stalls, frustrating no-starts, … By following these steps, you can identify and resolve common starting issues with your Holley Sniper EFI. 2L with a Sniper 2300 2BBL on it. Hit the key the fuel pump comes on like … The issue is that the engine will start, and run for about 2 minutes. Tried a number of times to re-start it and It would crank, fire up and immediately … New Sniper EFI, Holley HyperSpark ignition and distributor, radiator/electric fans, 1-wire alternator, swapping the C4 auto transmission for a new Tremec TKX 5-speed, etc. - Holley Performance Products Forums Home Forum Holley EFI Sniper EFI Sniper Stealth EFI installed 7 months ago. Progressive linkage causes driveability problems so you might want to remove that if you have … Holley Sniper Injector Problems- How to fix themAre you experiencing rough idle, slugish performance, lack of power. I can pour some gas down the carb and it’ll start back up when I crank … All wiring has been tied away from potential hazards such as the exhaust, fans, pulleys, spark plug wires, 12 Volt accessory wires, the ignition coil and ignition coil wiring. I have a minor leak at the 02 sensor … Pontiac 428 - Starts Runs for 10 Seconds & Dies. Like it starts and the second I let go of the starter switch it … After nearly 3 years and 2000+ miles of flawless service my Sniper efi is going wonky. Then it quits. By … Join the Holley Family Stay up to date with the latest releases, events, promotions and more. The first few … So, I remove my Quickfuel 880cfm and Mopar electronic distributor and coil from my 69 Barracuda with mild 440 and install the … Ran on self learning for a couple of runs, downloaded these onto the MicroSD then tuning using a computer and Holley's program. The … First off thanks to everyone who has been helping me get this thing running. Then i … Fitech EFI, MSD Digital 6AL ignition and Mallory coil. Car runs great for about half an hour then dies. hefi file). Since you don't know what was done initially to setup the Sniper, use the saveas … Stumped …. 2 4-bolt siamese block, Eagle 3. Your Datalogs are in the "Documents", "Holley" folder, "Sniper" folder, … Hey All, After the conversion to Holley Sniper EFI, my car is having an issue surging during cold start. I then have to unplug the battery for 20 to 40 … HELP! THE CAR: I have a 1968 SS396 which is stock except the Edelbrock 2-0 intake, Holley Avenger 670 with electric choke, HEI and Headers. Hey guys, I've ran into a issue with our mustang (390 S-code, stock components afaik). You also need to have the correct Target AFR in … I haven't posted in a while, but I wanted to share some issues we had in case it helps someone else on the thread. Since the install, the car hasn't run well. The problem I'm having is when the vehicle is being charged by the alternator OR a battery … I'm sharing the run datalog I was able to pull of the Sniper and a few details on how it's setup. THE PROBLEM: The car … Holley sniper, rpm says stall, will only run on the initial pump shot, what is wrong? Holley sniper issues with rpm signal and initial pump shot Anyone running a Holley sniper Efi on their Cleveland . I … I have a 1970 Mustang with a 347 running a Holley Sniper EFI. If … I could get the engine to run smoothly for a couple seconds, but something would change and it would go lean and eventually die. Holley EFI Troubleshooting: A 3% Error Caused THIS! Want to Learn How To TUNE Holley Efi, Terminator X, and Sniper? more When I start my car it starts fine then 2-3 seconds in it feels like it just hesitates drops RPM and wants to die. In the case … Your Config File is in the "Documents", "Holley" folder, "Sniper" folder, "Config Files" folder (. I noticed the fuel pressure shoots to 60 then falls … I have a sniperstealth witch dui ignition and Holley in tank pump. The truck runs then the Sniper 2 TOTALLY DIES! Holley Sniper Air Fuel Ratio Issues & Start Up Issues Symptoms & Fix CR Nuts Episode #16 Three start up issues that we encountered and fixed- Low Fuel Pressure, placement of the O2 Sensor The original Holley Sniper had the ECU built into the throttle body — not ideal for high-heat environments. I have a "Ready to Run" distributor. runs and dies. I've had this throttle body for a few months, haven't put 10 miles on it … Electrical Interference: The Silent Killer of EFI Performance Electrical gremlins are some of the most common yet hardest-to-diagnose … First startup with the Holley Sniper 2 on the 13B peripheral port. If I turn the key to the accessory position and let it prime & load up the file for a few … When the engine is warmed up, my Sniper will randomly start to run very rough and then stall within a second. Sounds like … Switching to a Holley Sniper EFI system can transform your vehicle’s performance, but starting problems can be annoying. I'm going to send an email to Blueprint for answers, but I figured that somebody here might have … This Cub Cadet with a Kohler Courage engine runs great for 30 seconds! Then it struggles, stalls and dies! Wait a short time, and then it happens again. By … Hey everyone, I’m pretty sure I’ve solved a couple of common problems with the Holley Sniper EFI system — especially issues that happen when things get hot under the hood. '92 Ford Mustang GT: 385"/6. After that, … Dodge d150-318. Any ideas what could be causing this? Discussion about a 1985 Chevy C30 with a 454 engine and Sniper When i prepped for EFI, i bought a separate in-tank fuel pump i had pre-wired already when i received the Holley Sniper kit. Started ok, as it idles IAC dropped eventually to 0 when it died. more Run through the entire synchronization routine and see if it'll stay running or run better. The engine starts and stalls within a couple of seconds. Symptoms: 5 inch …. The adventures of EFI If your unit starts up then immediately dies and then cranking again does nothing,, you need to check inside the throttle body to see if it is getting fuel. Having issues after installing: Sniper EFI, Sniper Hyperspark dizzy, Sniper ignition coil and box. . The truck runs then the Sniper 2 TOTALLY DIES! It sounds rough and runs poorly then often dies within 10 seconds if I don’t give it a little bit of throttle. 3L SBF, Dart SHP 8. Well I finally … Today we went to fire it up with the EFI and for the most part it cranks, then just starts to fire up, then dies. In my … I installed a Sniper 2 system a few months ago and everything was working fine. I have a sniperstealth witch dui ignition and Holley in tank pump. This may not be the answer to all Holly Sniper issues but it was a success for me. Also replaced old fuel lines with 3/8” Earls VaporGuard and … Sniper EFI Tuning & TechMay God's grace bless you in the Lord Jesus Christ. The starter will reliably turn the engine over, … I’m hooking my Holley sniper up after putting 302 in my bronco and went I go to start it up it’ll turn over for a split sec then die. All these annoying little quirks and problems that are known for the Sniper 1. If I add throttle, I can get it to run another … Sniper 2, basically stock Mopar 383 with a mild cam with 5000 miles on it. If I disconnect the battery and let the car sit for several hours, I can get it to start and run. But having problems , motor starts for a few seconds then shuts off . This thing will be the end of me! Bruce Senn ? EFI and Holley Sniper 4150-4500 performance … Continuing the Sniper 2 install. I did the Learn process and IAC Position settings per the Holley videos. The ECU is not shutting off, at least at 374 because the datalog would stop. Put foil back on and the car started OK the rest of the day, but … If you do this and your fuel pump still runs then see about returning your Sniper system under warranty. When it runs it runs great, no issues. Inline holley electric fuel pump. Ensuring your battery and … Since you’re on a stand alone igniting setup, the engine will never run if you do not provide an rpm input into the sniper. It did actually run … My Sniper will run great for a few days and then all of the sudden the AFR jumps to 32-35. I Had a holley sniper on this car with no issues whatsover. If you are idling at 2100 RPM (based on a default IAC Hold position of 30%) and your target idle speed is 900, then the ECU is not … Continuing the Sniper 2 install. … The truck cranks and fires, but will not stay running. You can try running without an air cleaner to see if it still stalls. Holley sniper EFI … Pontiac 428 - Starts Runs for 10 Seconds & Dies. When I try to start the motor, it starts and then immediately dies. Is it an ignition problem? They fact that it used to run says that this is probably OK, but a bump while driving could loosen the connection. Would be so grateful for any general guidance on ascertaining what the root issue … Switching to a Holley Sniper EFI system can transform your vehicle’s performance, but starting problems can be annoying. Avoid using any 90 degree fittings between the tank and pump. I have recently installed the Holley Sniper EFI … So this was todays performance. 9K subscribers Subscribe Continuing the Sniper 2 install. The other symptom I noticed is the IAC is at … If I instantly turn the key and fire up the engine it runs lean in warm up, like really lean. My brother and I build the car together, and we have the … Then about 1 minute into idling all the gauges on the handheld will flash red momentarily, then the AFR reading will go from a normal reading to saying "Heating" then … Holley sniper? When you mean won't run, how long does it run? What tach source are you using? No it’s a dominator. This v This video is about two common things that get overlooked, if your bike starts, runs for 30 seconds or so, and then dies. 470" forged … It starts and runs for about six seconds and then it jumps back in time to a -25 mark. I just installed it (brand new) . - Holley Performance Products Forums Home Forum Holley EFI Sniper EFI *Small rant. Was at an intersection, and the car died. I have multiple … If you do this and your fuel pump still runs then see about returning your Sniper system under warranty. If not then you can try what … The issue I have is the car will start and then die. But when I start it again immediately after, it fires up perfectly fine and runs normal. Often it does die or I have to blip the throttle a bit, then after that … #holley #free #fix #supercharged In this video I go over two issues that slowed down my Holley Super Sniper 2x4 install. Occasionally it spit back though the throttle body. Sniper 2 with PDM, no timing control, coil (-). But the Base Fuel Table needs to be close. The problem is … Then magically, after about 10-30 seconds, the AFRs will read their true values and things go back to normal immediately. If the 7-pin connector is fully seated, your heavy black & red … It sounds rough and runs poorly then often dies within 10 seconds if I don’t give it a little bit of throttle. You need to review all of your wiring especially any Sniper wiring that's running close to any … The Sniper turns the fan on at 251 seconds and it continues to run OK until 374 seconds. Then a few weeks ago it started stumbling when I released the throttle, both at cruise and at … Need help. In the last few months it will stall when the coolant gets above 180*F. … I'm having trouble with a Sniper that I just installed on my 1950 Chevy Pickup. Have to turn key off wait a few minutes and it'll restart. car has a kill shot from aces installed starts runs for about 6-8 seconds then dies … upon trying to start again without turning key off just When the switch is turned to start and encounters that "dead spot" then power will continue to flow from the battery (pin 30) and the Sniper (pin 87) for as long as the delay is set or until power is … I have a Sniper 2 on my 1971 Chevy Nova. The Sniper 2 moved the ECU to the side, which helps, but there’s more you can do. IMPORTANT NOTE: After each variable referenced in the article below I will … Would anyone be so kind as to help me understand what happened here? Was cruising along on the highway, then braked normally to come to a stop - engine dies. Looking at the 4500 sniper and I run Super Street 10. First problem that I am consistently encountering is the engine will start and idle/run to any rpm without issue for 30 seconds to 1 minute all of a sudden fuel pressure will go from … Sniper EFI Tuning & TechDo you have progressive linkage? That box is checked. There's no time to start or take a datalog so I cannot capture one. Car turns off and refuses to turn back on. QUESTION: Should I continue to decrease … That fixed the issue, was a bad cpu. Runs good, but dies while I drive down the road. The truck runs then the Sniper 2 TOTALLY DIES! Hello I have a customers '69 Mustang with a Holley Sniper kit installed. Doesn't sputter or run rough, just dies without warning. *Update* Got the ignition module replaced however it still runs for about 30-45 then dies. It was running fine for a while and only recently has had issues. I still have to press the 1985 chevy c30 454 with sniper 1 efi and hei distributor. When I go from Park to Reverse, or Drive, the idle goes down to 200 RPM, almost dies then corrects itself. But when I start it again immediately after, it fires up perfectly fine and runs … As a test, I switched the timing back to conventional, with the Holley just running the fueling So to do that, I disconnected the white … Then when you pull it into gear the IAC will open up to 10 or 15% and you'll be fine. It … Discussion on troubleshooting Holley Sniper EFI systems, focusing on issues where engines start, run briefly, and then stall. Occasionally, it will start and idle very well for a few seconds, but then dies as if someone shut off the key. Had a hard time starting it but it was because my timing was off but once I adjusted it the car started. In that attached datalog, I let it warm up, then went for a short cruise on the highway, back into the neighborhood, idled on the driveway for 30 seconds ish, then put into … Motor will not stay running - How to fix outboard motor that runs for 30 seconds and dies T-Mikes Vintage Outboards Restoration 17. My advice is look into your … I have the 1935 Hot Rod truck with a 306 small block ford with the Holley Sniper EFI from Blue Print Engines. Idle drops down and almost … Next day we tried taking the foil back off for a bit and then the car would start & die or run for 5 to 10 seconds & die. You may have a misifiring injector. Bosch part number 17025 it's the same as the holley part and I found it on ebay for 35$ shipped the holley and local parts stores wanted … Car ran fine last year but the first time I started it this year it idled fine then just died after several minutesit would fire right back after waiting for like a minute or so and run … I have an '89 Jeep 4. * It feel likes I’ve been fighting issues with this thing since initial install. Regular maintenance … Engine just stops intermittently, may or may not restart Pontiac - Street I'm now at the point where the car will start, run for about 15 seconds but then eventually choke itself out, the RPM fall and it dies. asv1ffstpd
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