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Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... (Holley Sniper EFI Save GCF On SD Card & Laptop/PC Usage, LINK - Page 73) Overlay the datalog onto your Global Config File (GCF), and pay special ...08-28-2018, 04:33 PM. Hi, I'm having problems with my Sniper. The AFR stays stuck at 35.6, I already changed the oxygen sensor and it stays the same, at 35.6. I read in this forum that there seems to be a problem with the Sniper in that sense. I would like to know how to proceed to escalate this issue to Holley.Street-Strip-Show-AutoX. 406 SBC with progressive single stage of nitrous, Dart SHP block, Dart Pro1 heads, Holley Sniper EFI with HyperSpark, Comp Cams, NOS Cheater plate with Powershot solenoids. 700R-4 ProBuilt, Moser 12-bolt with 3.91 gears and a Tru-Track, UMI suspension with Konis, big brakes, 6-point roll bar, lowered, Boze Forged 18 ...I have a buddy trying to update the FW on a Sniper, and he's getting a Searching For ECU message on the 3.5" TSLCD. From searching the forums and the interwebs, it sounds like this is caused by a mismatch in FW versions between the 3.5" TSLCD and the ECU, the ECU is not getting power, or the ECU is bricked. That in04-06-2024, 11:04 AM. There's no absolute answer to that question. Snipers will sometimes make more power than a carburetor and sometimes they will make less power than a carburetor. A lot of it depends on the tuning. If both are tuned by an expert the power difference is usually very, very small.Home. Please log in to your account to view your subscribed posts. Last Post: Wiring Park/Neutral Safety Switch to Holley ECU. Wiring Park/Neutral Safety Switch to Holley …Street-Strip-Show-AutoX. 406 SBC with progressive single stage of nitrous, Dart SHP block, Dart Pro1 heads, Holley Sniper EFI with HyperSpark, Comp Cams, NOS Cheater plate with Powershot solenoids. 700R-4 ProBuilt, Moser 12-bolt with 3.91 gears and a Tru-Track, UMI suspension with Konis, big brakes, 6-point roll bar, lowered, Boze Forged 18 ...Follow all installation steps. Install a fuel pressure gauge at the inlet of the Sniper so you can verify proper pressure. With your first start, focus on the idle. Set the idle screw for the IAC Position when the engine is fully up to temperature. If you can't get it to idle properly, take a datalog and post it here.Holley Sniper Running Rough/Won't Idle. 02-05-2024, 07:03 PM. Holley Sniper won't idle and running very rough. Attached datalog. Wondering if it's a bad WBO2 sensor or stuck injector. Attached Files. Rough Idle.zip (58.4 KB, 11 views)When I put my Sniper sensor in the driver's side rear manifold location (Edelbrock RPM Air Gap), it reads a lot cooler (usually around 50° while the engine is warming up). I drove around late at night last night and my gauge read dead on 180°-185°, while the Sniper reading was reading 143°-145°.06-18-2019, 07:45 PM. Hey guys. I have a 383 stroker in a '69 Camaro. Dynatech long tube headers with 3" Dynatech exhaust. I just installed the Sniper with HyperSpark …To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...If you command 15° and the timing is 15°, your timing at idle is synchronized. Leave the Static Timing function and check again. If you're commanding 12° and the timing is 15°, the Idle Spark control has kicked in. For many engines, especially if you're running a non-stock cam, you may find that the engine will prefer 20° or 22° at idle.Idle to full throttle help. 04-08-2024, 08:01 PM. 350 Pontiac, bored .030" over, 9.5 comp, single-plane intake, also using full timing control Sniper HyperSpark ignition. My problem is from off idle to full wide-open quickly, I can see AFR go lean and engine coughs and sometimes cuts off. But if I start slow and then go wide-open it seems way ...To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... Holley oversells the Sniper by saying the …With a 195° thermostat my CTS read 155° to 160°. For a quick check, when the engine is fully cold turn on the ignition and navigate to the monitor displays on the handheld. Before starting compare the CTS and MAT readings. If the CTS reads 5 or 10°F higher than the MAT then the CTS should be replaced. Danny Cabral.Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... When the Sniper data looks like it is reading correctly, the problem usually is found beyond the Sniper. It's a little hard to see from …Starting Over From Scratch. 05-13-2020, 08:53 AM. I've had numerous rich idle and rich startup issues and I'm starting over. There are so many areas to take fuel away I'm having difficulty knowing which one to pick from. Most of my issues are when first starting the car to the ten minute warmup to temp.I also had the front passenger side injector stop working, but for me it was intermittent and took a long time to pinpoint the actual problem. In my case, it was 100% Holley's fault, the connector on the injector was incorrectly mounted. The metal connectors weren't on the pins of the injectors and only lied next to them.Tweet. #1. Sniper 2 not ready yet. 10-04-2023, 12:02 PM. We have a customer's engine on the dyno for testing. He bought a Sniper 2 and a HyperSpark Ready-To-Run distributor. The Sniper 2 isn't ready for prime time yet. There's no way to connect a laptop to the Sniper 2 since Holley hasn't released a USB to M8 cable.Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... I elected to use the Sniper regulator with a return line to keep gas circulated in the TB, because I mostly race the car. So I'm thinking it could ...On my sniper install (New Pace Performance Crate Engine, mild cam, 390 HP) the rpm's would climb/surge on start ups. The advise from Holley rep was to close off the IAC port with tape. Set the linkage screw for idle (mine about 650). Pull the tape and idle should remain the same, IAC gauge reading 7-9.Take the datalog for 15 to 30 seconds with no throttle input and don't leave the datalog screen while collecting the datalog. The cold start datalog, if the engine was fully cold and this was the first start, shows a CTS of 66°F and a MAT of 48°F. This 18°F difference indicates that you have a defective Holley supplied CTS.Selena Gomez's Rare Impact Fund, MTVE, and the Biden-Harris administration team up to host the first live Mental Health Youth Action Forum on May 18. On May 18, MTV Entertainment (...The world of sports is not just about the athletes and their performances on the field. It’s also about the passionate fans who support their favorite teams and engage in discussio...All about GROUNDS. 09-22-2020, 03:00 PM. I've been doing a lot of research concerning grounds since my gut tells me that's where my issue lies. I've studied what Holley recommends, what a few successful forum members have done, what some race car wiring experts recommend (Vanderhoof), what companies like Ron Francis or Haltech recommend and ...Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... Holley Sniper Fuel Leaks 07-10-2020, 01:23 PM. Hello again everybody. I'm …I have a 1969 Camaro with small block 350, unknown cam, Edelbrock RPM Air-Gap intake, 462 heads, Sniper EFI, HyperSpark distributor, ignition box, and coil. MSD Super Conductor wires, NGK BR6HS plugs gapped at .035". Holley in-tank 12-300 pump returnless. TH400 transmission. Ever since I bought the car in 2020 it had aAnd as of today I have exhausted all research, reading and troubleshooting for my Holley Sniper. 1 - This unit has been working since May of 2019 until March 10th 2020. I installed the new Holley HyperSpark ignition system on the 11th. Distributor, Coil and Ignition box. Truck fired up and ran after installation.Beet juice is celebrated as a superfood. It is becoming more popular as the health benefits of beet juice are discussed in health and nutrition forums. Even some athletes take it a...Share. Tweet. #1. Holley Sniper warm/hot start issues. 10-27-2021, 11:41 AM. I'm new to the forum, but have spent some time researching similar issues and appreciate the help. I recently installed the Holley Sniper on my SBF 302 in my 1980 Mercury Capri. My block is .030" over, I'm running Trick Flow heads & Stage 2 CAM, MSD Billet Distributor ...Electric Fan setup on Sniper EFI. 05-03-2024, 07:34 PM. So I’m attempting to set a Electric Fan on my Sniper, looking at the manual it says to hook the light blue wire to the relay ground trigger. I believe I have the relay setup properly, I have pin 30 to constant 12V, pin 87 to fan positive, pin 86 hot at all times, and pin 85 to the Holley.Sniper EFI. Not enough power. No power to 3.5" TSLCD or fuel pump. Fuel flow at idle too high. Too much fuel at throttle 20%+ & up. Closed Loop disable & WBO2 sensor. Leans out on load, idle runs away during cruise. 110 mile cruise today.On a Cobra replica common problems that will cause Sniper (or any aftermarket EFI) issues are: 1) Exhaust leaks at the header flanges, even a pinhole will cause overly rich conditions. 2) Leaks at slip joints - some replicas have slip joints between the header flange and the muffler. A leak/smoke test may be required.Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... (Holley Sniper EFI Datalogging Tech Video) May God's grace bless you in the Lord Jesus Christ. '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 ...Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an answer. ... (Sniper EFI Software & Holley 558-443 CAN/USB Dongle) https://forums.holley.com ... To start viewing messages, select the for#1. Anyone 100% happy with the Sniper? 08-14-2018, 03:45 APlease be aware that this is a community forum. Althou
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Tweet. #1. 3000 RPM Stumble. 03-20-2024, 02:30 PM. Hello all. My 302 Sniper with HyperSpark Ready-To-Run setup is running really well overall since the previous assistance that was provided. Truly appreciate it. However, the car stumbles as it reaches and pass 3000 RPM. Doesn't matter if you shove the pedal through the floor or …Sniper Won't Learn. 10-20-2019, 09:37 PM. Hello. I'm running a new tune on my Sniper. While cruising at a steady throttle I noticed Target A/F Ratio and actual AFR are 1-2 ratios off. IE, if the target is 14.7:1, it'll be 12-13:1. So I pulled up the vitals page under multi-gauge menu. I noticed it sits in Open Loop and Not Learning.To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... Holley Sniper fine tuning adjustments. 03 …Tweet. #1. Sniper 2300 stalling out when returning to idle. 02-26-2022, 12:51 AM. Hi. I'm reposting this thread now with zip file containing GCF & Datalogs. I've installed Sniper 2300 on my Triumph Stag V8 and it's working almost perfectly. Startup is great, hot or cold starts and it runs very smoothly and revs freely.Whistle Sound. 07-18-2023, 10:12 AM. OK let's tackle another minor issue. I've read a few threads and seen videos about this, but I'd like to get an answer from Holley forums. As many people have encountered, there's a whistle sound that happens during acceleration.Getting around 6 MPG. I see lots of noise in my AFR. Three backfires through the intake between 30 & 35 seconds during moderate acceleration. I have progressive linkage that should kick in around 47% TPS, but I can't even get to that much throttle without a backfire. I have headers with dual 3" exhaust and an H-pipe.Holley projection is allot more "tweaking" than sniper. Now the only reason one would run Projection would (typically) be if you were running high horsepower, nitrous, etc. I was surprised Holley kept making projection, but then realized there were still special performance applications. Projection has always been finicky.With your computer, insert the SD card and go to File Explorer. In the root folder you should have a HOLLEY Folder, a saved datalogs folder, and a file with a .fwu extension. In some cases, if you unzip the file the three folders will end up as sub-folders on the SD card and the two folders will be sub-folders.02-12-2023, 11:23 AM. Most likely the Blanking value, but it could also be a mechanical problem or a wiring problem. Closed Loop pays a lot of attention to TPS as well as other engine parameters. If anything is jittery then Closed Loop will kick off. Look at your datalogs.Jun 12, 2023 · It was a gradual process of learning from my own experiences, other users, Holley technical forums, EFI systems pro, technical bulletins and other sources. My intention for this thread is to bring together information that I spent time researching – into one place, and answer some of the common questions that surround the Holley Sniper platform.Tweet. #1. New Sniper, hard starts & stalling after 15 seconds. 12-11-2022, 08:01 PM. Hey guys. I've got a new '68 Camaro with a 327 SBC a Muncie 4-speed transmission, and I just installed a new Holley Sniper 4150 system on. Ever since day one I've been having hard starting issues when both hot & cold that I could use some advice on.To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...#1. Anyone 100% happy with the Sniper? 08-14-2018, 03:45 AM. Hi all. Don't get me wrong the Sniper kind of works, but I don't think it's that great. There's a endless forum of …Hard cranking when hot. 09-02-2022, 12:08 PM. I've got a 460 Ford with Holley Sniper as well as the HyperSpark distributor. I've had an issue where the starter drags very hard to start the truck when warm. I've replaced the starter with a new high torque starter, all new cables and bigger battery.It's a Sniper 1 going on a fairly stout 427 SBC making 550/550 HP/TQ. We recently got the car to start, but we're having a few issues. One of them being the IAC Position. ... Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be ...I have a Ford 352 FE with the Super Sniper EFI and Holley Dual Sync Distributor installed. I do have an aggressive cam installed and idle set to 800 RPM, any lower an it will sometimes die when issue starts. Cold it starts fine and drives fine. Once it gets to 180-190°F and fans start to kick on & off at idle, the engine starts to stumble and ...Parasitic draw from Sniper. 11-01-2023, 10:02 AM. Good morning, I have a question. I've been having dead batteries over the last three years and I have traced a parasitic draw to the Sniper ECU. It's pulling .54 volts with the key off. I've checked the Pink wire going to the relay supplied by Holley in the wiring harness and it has no voltage ...[cma-index] We are an affiliate for products that we recommend and receive compensation from the companies whose products we recommend on this site. The placement of the links on t...Again, this may be a faulty Base Fuel Table or lack of pressure or a bad injector. Step 1 - measure your pressure. Step 2 - remove your air cleaner and have someone turn on the ignition. Watch for the prime shot. All four injectors should provide equal amounts of fuel.At this point, changes made with the laptop are real-time updated in the ECU. • "Get From ECU" & "Send To ECU" - ECU Sync window: When you connect a laptop and go "Online" with the ECU, you first want to click "Get From ECU". This updates your laptop with the latest ECU "state of tune". If you click "Send To ECU", you overwrite all the ...Tweet. #1. Progressive Linkage makes Sniper EFI WAAAY Better. 05-12-2018, 01:30 PM. The fact that Holley released new firmware for the Sniper EFI System recently slipped past most existing owners. And while I am not one to recommend upgrading firmware just because it is there, the new firmware supports a feature that I think is really a huge ...'92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, Eagle 3.470" forged steel crankshaft & H-beam rods, Wiseco 4.200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm ...Sniper - No Data Issue - Need Help. 01-21-2023, 07:52 PM. Hi, JR Hamilton. I have a '68 GTO, Pontiac 461 Stroker engine that was recently build and dynoed by Kauffman Racing. The engine ran with the HyperSpark and 550-510 Sniper on the dyno, and ran great from the builder. After installing the engine, Sniper, HyperSpark, and wiring, in the car ...To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...Are you passionate about wrestling? Whether you’re a novice or an expert, the Penn State Wrestling Forum is a valuable resource that can enhance your knowledge and connect you with...To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not guarantee an answer or timing on an ...I have a Ford 352 FE with the Super Sniper EFI and On the Holley website, the basic kit without a fuel syst
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Tweet. #1. Sniper doesn't trigger fuel pump relay. 12-22-2020, 02:23 PM. I've moved the relay to the trunk. Here's what I have: Hot & ground to battery. Ran wire from "C" 7-pin connector. Hooked pink wire to IGN position on fuse block.Jan 26, 2024 · Tweet. #8. 01-26-2024, 10:21 AM. The transmission controller from Holley is going to be a lot cleaner in terms of installation. The transmission controller and the Sniper are linked via CAN Bus. This eliminates the need for extra TPS or RPM connections.Sniper EFI Tuning & Tech. May God's grace bless you in the Lord Jesus Christ. '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, Eagle 3.470" forged steel crankshaft & H-beam rods, Wiseco 4.200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp ...Originally posted by jd21476 View Post. My Sniper keeps going into OPEN LOOP, which causes my idle RPM to go crazy and jump to between 1600 & 2100 RPM. The Holley Sniper EFI will intermittently inhibit Closed Loop at idle, if the AE vs TPS/MAP RoC Blanking values are set too low ( LINK ). However, if the Base Fuel Table (VE% Table) was well ...Hello all. Apologies in advance. Very new to the Sniper EFI in general stuff. So engine info: '67 Mustang with an '85 date code Ford 302. Configured as follows standard bore hypereutectic pistons from Summit can provide part number if necessary. E303 cam, GT-40 3 bar heads engine gone through 3000 miles ago. Re-ringed cause itIt could be made functional for Super Sniper owners if Holley provided a firmware update to map the appropriate CAN Channel ID # to a custom input. Alternate options: If you have a Super Sniper with spare 0-5v inputs, you can install your own oil pressure sender and map to 'Custom Input #' on the Dash 1, 2, or 3 layouts on the Sniper 3.5" TSLCD.Tweet. #1. Sniper stalls after ten miles. 09-14-2021, 07:48 AM. I have installed a Sniper on a new Blueprint 383, it runs great, when it runs. I'm having an issue after about ten miles, it goes into a stall, and dies. (Attached datalog.) Stall log.zip.Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... I'm finding that several Sniper EFI Systems customers are getting to the end of their Setup Wizard process and getting a message that says that the ...Sniper - No Data Issue - Need Help. 01-21-2023, 07:52 PM. Hi, JR Hamilton. I have a '68 GTO, Pontiac 461 Stroker engine that was recently build and dynoed by Kauffman Racing. The engine ran with the HyperSpark and 550-510 Sniper on the dyno, and ran great from the builder. After installing the engine, Sniper, HyperSpark, and …Sniper EFI Tuning & Tech. May God's grace bless you in the Lord Jesus Christ. '92 Ford Mustang GT: 385"/6.3L SBF, Dart SHP 8.2 block, Eagle 3.470" forged steel crankshaft & H-beam rods, Wiseco 4.200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/.623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp ...Tweet. #1. Sniper MAP sensor issues. 10-27-2020, 10:34 AM. Over the last couple days we've had temps down into the single digits and a few dips below zero. Truck fires right up and runs great even at these temps, but on two occasions it suddenly stumbled on acceleration and continued to run poorly. Idled a couple miles home both times.Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... yada, but don't realize that's for the other Holley EFI systems and not Sniper EFI. Anyway, my Blanking values are at the stock settings ...Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. ... If you have 12 volts on the Sniper side, but no response from the Sniper you may need to contact Holley support. Some have had success waking up a ...04-14-2020, 02:15 PM. Many, if not most, of the problems reported on this board have little to nothing to do with the Sniper itself. There are a lot of wiring problems, vacuum leaks, and mechanical problems that people have, which they blame on the Sniper. Having said that, there certainly are Snipers that go bad.No doubt Holley could improve the Sniper experience without too much effort. They could fix the horrible timing curve that the Wizard builds, get rid of the Simple tables and default everything to 2D Tables and stuff like that. They could also hire an expert to help them harden the Sniper against RFI noise.Idle Target AFR is 13.6. Timing is 14° initial, 32° total with no vacuum advance connected. Sniper is in Coil Negative mode. Cast Iron Ford 351W heads with oversize intake/exhaust valves. Cam duration at .050" lift is 224° intake, 230° exhaust. Engine idles with 11 inches of vacuum at target 750 RPM.Tweet. #1. Sniper EFI Problems. 11-09-2021, 03:51 PM. I have a Holley Sniper EFI with HyperSpark ignition. I recently bought the car with the EFI system on it. The person I bought it from said he never could get it to run for more than a few seconds. I got it home, checked it all over, everything is hooked up correctly.4) Cycled the key with the IAC motor unplugged during high idle condition and the high idle condition continues when cranked back with the IAC motor unplugged. 5) Car consistently idles correctly after a key cycle. Until it decides to high idle again. 6) Problem always occurs when reducing RPM after throttle input.As of today, if you download the "Sniper EFI SD Card Contents" link for the support page for the Sniper EFI, you get firmware version fw_02_00_0310. If you look at the latest Sniper EFI Firmware Revision Log, the latest version should be FW_01_03_0500. I downloaded the version 2.0.31 and loaded into my Sniper ECU.Start, but runs extremely rough. 05-26-2024, 02:44 PM. Hi All: Last year I bought a heavily modified Porsche 914 with twin turbos, running a Holley Super Sniper. It was running rough and leaking oil, so I decided to pull the engine and rebuild it (all new seals, clutch/flywheel, plugs, etc.). I'm a novice mechanic, but love to get my hands dirty.Holley Sniper Running Rough/Won't Idle. 02-05-2024, 07:03 PM. Holley Sniper won't idle and running very rough. Attached datalog. Wondering if it's a bad WBO2 sensor or stuck injector. Attached Files. Rough Idle.zip (58.4 KB, 11 views)Tweet. #1. Sniper Rough Cold Start. 05-30-2022, 01:30 PM. Greetings. Just completed my install of a Sniper on my 1985 Chevy K10 350. Install went fairly smooth with no issues. The problem I'm having is on cold startup, it's very rough even dying occasionally. Even after reaching < 165°F idle is still rough, but not as bad. 03-10-2020, 02:13 PM. Exactly. At idle your AFR is