May God's grace bless you in the Lord Jesus Christ. Most tuning parameters and software functions can be found by selecting an icon from the toolbar. 0. Sometimes it almost fires. Sniper EFI Tuning & Tech. New plugs and wires. Pull the pink wire off the battery positive terminal and see if the Sniper shuts off. How to open them using the Sniper software and how to e-mail them to somebody for review. Apr 25, 2018 · Won’t Start 04-25-2018, 07:00 PM. All connections good, distributor wires I have a 598" BBC with a large cam. From searching the forums and the interwebs, it sounds like this is caused by a mismatch in FW versions between the 3. My friend has a Sniper 1 on a '66 Ford Bronco. And when I try to update the ECU it says folder not found. Once you load the software, you will be able to access all “Help” and “Installation manuals. So not controlled by the EFI and was running great till now. I can't get it to run to get a hot idle IAC Position. 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! Jun 8, 2024 · Good afternoon. I was out last weekend, cruising at about 45 MPH when it backfired, quit running and wouldn't start again. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Originally Posted by Danny Cabral • Just to recap - Synchronizing the EFI timing (laptop) with the engine timing (timing light): NOTE: Temporarily disable the "Idle Spark" control (in Idle Settings). It won't start Learning until 160°F, and I can't keep it running. When cranking, does prime the fuel pump and there’s RPM, but the side of the throttle body smells like burnt wiring and gets extremely hot with key off and getting anywhere between 2-9 amp draw to the throttle body when turned off. The pump that came with my system from holley puts out 60 and is of course regulated in the efi. I suggest completely removing the Holley EFI software from the "Control Panel", "My Documents" (Holley folder) and the "C:Drive" (Program Files, Holley folder) and install a fresh EFI software download. Initial install appeared to go well, followed all instructions, adjusted IAC, etc. 623" lift/114° LSA H/R camshaft, TFS R-Series FTI Comp Ported intake, BBK 80mm throttle body, Holley Dominator MPFI Feb 27, 2023 · Holley Sniper Air Fuel Ratio Issues & Start Up Issues Symptoms & FixCR Nuts Episode #16 Three start up issues that we encountered and fixed- Low Fuel Pressur Oct 1, 2021 · Just got a 1969 Mustang last week and previous owner installed a Sniper EFI about a month ago prior to the purchase. Apr 24, 2024 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Categories. I can get the car to start pumping it like a carb and it will stay running if I hold my foot on the pedal for a bit, but it seems even if I adjust the IAC screw to hold the throttle open, after a little bit of time the idle will fall and stall out. Aug 18, 2022 · Sniper EFI Tuning & Tech. Nov 28, 2017 · I have the stock 1994 Chevy distributor & coil. Installed the Holley Sniper unit. Car is stored for winter, but would like to figure out in case Jul 9, 2018 · Sniper EFI Idle Setting/Throttle Blade Setting (Holley Sniper EFI Quick Start Manual): Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. Start/Stop Disabler; Holley EFI. Drove for about 40 miles then it died at idle and would not start again. After I've driven the car and it's up to temperature, if I shut it off and wait 15 to 20 minutes, the idle surges badly upon startup. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp No extra return spring, just the standard Sniper EFI setup. Brand new spark plugs, fuel lines, wiring, fuel tank, and fuel pump. I have had this persistent pop back under load at low RPM such as pulling away from stop sign and in 2nd gear if I give it throttle it backfires up though the carb. Jan 20, 2020 · 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! Oct 21, 2019 · Sniper EFI Tuning & Tech. Picked up a high pressure pump (Sniper requires 60 psi). Wire test Dec 13, 2016 · IntroductionOk, we have enough Sniper systems out there that I thought it would be a good idea to create a posting on challenges that might arise during installation. 5 " touch screen to power up), wetting the intake and allowing the engine to start much quicker. 1987 IROC-Z Camaro. I can manually make the coil fire by grounding out the white points wire from the ignition box, but the coil does not fire while cranking. Sep 4, 2022 · To start viewing messages, select the forum that you want to visit from the selection below. It was working earlier, but it's since stopped working. The truck starts & runs fine when the weather is warmer 50+°F, but when outside temperatures get in the 30s°F it won't start. Here we go: The car & engine: Dodge Challenger 1970, 440 Magnum, 550-511K Sniper, Edelbrock Torker II intake (single-plane), MSD 6AL, Comp Cams camshaft 21-225-4 (Street/Strip, 11. 5 inHg of vacuum). Jul 14, 2023 · Hello. Parked the car in the garage and left. The yellow wire from the Sniper has to go to COIL−. It says connected ECU version is not supported by this device firmware upgrade is required. I don't think that the issue is with the return. 734 secs. Hit the key and it started right up. Jul 4, 2020 · Then upon a hot start, with me feathering the pedal to keep it running, it would go back to 0. Called Holley, talked to a tech (very helpful and knowledgeable). Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. The car runs amazing with the Sniper when started cold and driving. Apr 4, 2021 · Hello everyone. So I did and now it won't update the firmware to the ECU. May 6, 2019 · Sniper EFI Tuning & Tech. Feb 2, 2020 · Sniper EFI Idle Setting/Throttle Blade Setting (Holley Sniper EFI Quick Start Manual): Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. 5" LCD and the Sniper PC software. I started the car a couple times. May 1, 2020 · If I take a ten mile drive, it might not start giving me a problem until I am over half way through the drive or more. Aug 17, 2020 · Sniper EFI Tuning & Tech. 700R-4 ProBuilt, Moser 12-bolt with 3. The following is designed to be used as a “Quick Start” guide for some HP and Dominator EFI system applications Mar 16, 2024 · To start viewing messages, select the forum that you want to visit from the selection below. 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 it appears low, after confirming the battery, inspect where you have the pink trigger wire attached. I went through the initial startup and got it running, though I did not run it for very long. This morning the car won't start. Apr 27, 2019 · Sniper EFI Idle Setting/Throttle Blade Setting (Holley Sniper EFI Quick Start Manual): Once the engine is up to operating temperature, the idle speed can be set to what was configured in the Wizard. Cold startup 40°F it struggles to run. So timing is my real issue. Specifically, nothing happens when I turn the key to the ON position. Sep 28, 2019 · After reading through numerous threads on the Holley Sniper Forum about similar hot start problems it appears that you need to download Holley's software to a lap top (which I don't own), and program the starting fuel pressure to the temperature of the coolant. Join the Holley Family. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Apr 26, 2023 · My HyperSpark controlled Sniper in my 350 SBC has been up and running for over two years without a problem. The fuel pressure is 58 psi. 12/02/2009. The issue I'm having is with the engine stalling when coming back to a stop. I followed the Holley video as well as the provided instructions. Some people get a little carried away with Blanking values or see the various posts online saying they should be 7 and yada, yada, but don’t realize that’s for the other Holley EFI systems and not Sniper EFI. Cold (86°F and Warm (144°F) it starts and runs fine, like reach in the window and crank the key fine, from power on starter solenoid to achieve crank-to-run RPM is 0. Set up: Chevy 350 w/ MSD ignition Street Fire CDI. Installed it exactly as recommended with all Holley parts with no expenses spared. Stay up to date with the latest releases, events, promotions and more. Mar 20, 2024 · I have a buddy trying to update the FW on a Sniper, and he's getting a Searching For ECU message on the 3. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Jun 25, 2019 · 1. Sometimes a hard start when warm can be due to a improperly set IAC or a IAC Parked Position that doesn't provide enough air during cranking. On & off have had multiple issues with the system leaving me stranded in regards to the IAC valve and the WBO2 sensor. Oct 26, 2021 · Street-Strip-Show-AutoX. Verify Wiring - ECU must be powered and grounded directly at the battery and the battery is fully charged. I'm a novice mechanic, but love to get my hands dirty. Move the truck a few feet, shut off, install new fuel pressure regulator. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Jun 28, 2022 · Sniper EFI Tuning & Tech. I will check with another gauge. Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software : In the Sniper EFI software ( LINK ), Target Air/Fuel Ratio Table (Fuel ICF) & Base Feb 4, 2023 · I have a Holley Sniper on a 350 that has just been rebuilt. Jan 22, 2023 · I have a Holley Sniper 4150 and yesterday I read something about updating the ECU firmware on the Holley. If your EFI is causing headaches, don’t worry. Jun 23, 2023 · Got a question about my Sniper. It just cranks. That in May 13, 2019 · 4 Injector 2300 Super Sniper EFI (550-852 Shiny, 550 -853 Black, & 550-854 Gold) QUICKSTART MANUAL SNIPER EFI INSTALLATION INSTRUCTIONS Congratulations on your purchase of a new Sniper EFI Throttle Body System built by craftsmen to exacting standards in our Bowling Green, Kentucky facility. As I'm sure most people here know, EFI plus no RPM equals no start. Cranks and wants to start, but then quits. Aug 16, 2021 · Sniper EFI Tuning & Tech. Thus, Holley can not guarantee an answer or timing on an answer. Categories; New & Hot Products; Engine. FUEL SYNC Engine won't start after converting to timing control with magnetic distributor & CDI box. If it runs normally, pull the pink wire and the engine should shut off as well as the pump. Feb 21, 2019 · My Bronco with Holley Sniper EFI was running poorly. I'm using the plug & play harness as well for ease of installation. No exhaust Dec 13, 2022 · I caught the bug to do some cold start tuning. At initial cold start it May 6, 2024 · New here, but have some questions. 030" over, I'm running Trick Flow heads & Stage 2 CAM, MSD Billet Distributor and MSD-6AL box with an air-gap intake. 5 Super Conductor Wires with the Sniper EFI INSTALLATION: NOTE: Part number 520-1 is a complete installation kit. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Apr 30, 2018 · 1 Sniper Stealth 4500 (550-841 Shiny, 550-842 Black, & 550-843 Gold) Holley Sniper EFI FUEL INJECTION INSTALLATION MANUAL Often times, when EFI software related functions don't work properly, it's caused by a corrupted software download/installation. Also, after warmup & running, if I come to a stop the engine will stall & shut off. I can't go into Global Configuration. The Sniper ECU is sensitive to voltage and the injector performance is also affected by voltage. The car will startup, but only if I lightly press the gas pedal (otherwise Feb 1, 2024 · This summer after sitting for extended periods of time, car wouldn't start unless I'd pump the accelerator pedal. The engine is back in the car, and Jul 2, 2017 · I wanted to go with an in-tank fuel pump, so got one for an EFI car and did some modifying to it for the return line. Looking at the datalogs shows zero TPS RoC & MAP RoC. Detailed instructions of each icon are contained in this manual. If you can duplicate the no/hard start condition, turn on the ignition, start a datalog, and attempt to start then engine. Oct 21, 2022 · There are some things that you must be able to do to get help here. Sep 8, 2022 · Turn on the ignition and navigate to the monitor screens and verify that you have a good 12 to 12. He told me to wire in a relay at the Pink key on wire, because the voltage was dropping too low. I did a startup datalog and for the first couple of seconds the AFR is 12. 2L 258 AMC inline 6 in my Jeep with a vacuum advance HEI distributor. I'll have limited time on the Holley Forum during this time frame. Every Sniper EFI System is May 9, 2021 · The Sniper EFI doesn't have the same TPS Autoset function as the Terminator, HP & Dominator ECUs. May 22, 2022 · Unless you've already spent money on a new sending unit in the tank. The Sniper EFI was installed ~18 months ago, then about 6 months ago I swapped out an old MSD Pro Billet distributor & 6AL box (Causing misses, backfires, etc. I have an MSD Pro Billet distributor and an analog MSD 6AL CDI box. The scenario is as follows: Cruising down the road on May 25, 2020 · May God's grace bless you in the Lord Jesus Christ. My block is . 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. Holley RetroBright. 3L SBF, Dart SHP 8. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Jan 7, 2021 · I've been running a QuadraJet Sniper for a couple hundred miles now and driving performance is improving with each trip. '92 Ford Mustang GT: 385"/6. Sniper EFI. The fuel pump is external and even with the bottom of the fuel tank. If I turn the key on, no engine start, the TPS reads between 0% & 1%. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Feb 8, 2023 · This will show the battery voltage before start, the dip in voltage when the starter engages, cranking voltage, and then post-start voltage. But, what if you purchased your TBI a few years ago? Don't worry, you can upgrade to Sep 22, 2022 · Something new started happening when I drive the truck. NOTICE: I'm on vacation from Saturday July 20, until Tuesday July 30. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp This contains detailed information on how to use Holley EFI software and perform tuning that is included within the software itself. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Oct 25, 2020 · Support Those Who Support The GarageFor more tuning content check out our partner Elite Tuned School:http://www. The throttle hangs and won't return to idle when I left off the gas. 5 and never changes until it's warmed up. Reference Angle at 45° with reluctor wheel ligned up moved crank to 15° BTDC, used the phased rotor to align to #1 cylinder. Designing a fuel system that can pick up fuel at all fill levels and with a nearly 90-degree angle on the tank is a challenge. Oct 8, 2021 · It cranks but wont turn over. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Hello all. I'm running a brand new Ford Racing 302 crate engine with a Holley Sniper. Jun 15, 2021 · Thanks for the reply. Fuel_Injection (Sniper EFI Software & Holley 558-443 CAN/USB Dongle Aug 11, 2017 · The Sniper EFI System will absolutely work fine in your rock crawler, Todd. The truck starts & runs great at ambient temperature all the way til you get to your destination and you shut it off. I installed the EFI on a '88 Ford 302 that I put in my '82 Mustang. Cycle the ignition to load the Config File. Jul 24, 2017 · Holley EFI; Sniper EFI; If this is your first visit, be sure to check out the FAQ by clicking the link above. Stick around to solve your EFI woes once and for all. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FTI Comp Ported intake Hi everybody! In first: I speak French, so forgive me if I make mistakes. While I can't guarantee I didn't over tighten the Holley hall effect sensor and damage it, the fix was to install the Cherry GS100102 . It then has a hard start and will run, but won't idle. HOWEVER, I did get it to the point I could start like you should by adjusting throttle blades and IAC between 2 & 10%. I have a Sniper 1 on a SBC. " 08-04-2023, 05:53 PM. I've run through the setup Wizard multiple times to ensure that I've set things up properly (again checked by multiple people). Go to start, won’t crank again. Feb 22, 2018 · Hey guys, new to the forum and new owner of a Sniper EFI kit, which we just installed on my '71 C30 with a 402 BBC, that I have less than 20 miles on. All of these things are found in the Holley Sniper instructions, Forum post searches and Holley YouTube videos. I have no problem with cold start, the engine May 25, 2024 · Now display shows no voltage or a jump around a little bit won't start, shows WBO2 censored disconnect. Setup the distributor per instructions from the Holley video. Fuel pressure at 60 psi sitting, cranking/running just under 60 psi. No change, it still won't start easily when warmed up. I removed the PCV valve and installed a simple breather in hopes it made a difference. Here is what I have done so far: - Sent data log to Holley. 3. (Holley Sniper EFI Fuel Pressure Tester/Gauge) Originally Posted by Danny Cabral Quick Datalogger Dec 2, 2009 · Quick Start Tuning. 200" forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. The challenge will be what you call the "right fuel system". My setup is as follows: 351C, Holley Sniper EFI 4150, HyperSpark, Crane Cams ignition box. 10 min read Video. I've haven't done any tuning to the ECU and only used the tune from the Wizard. Anyway, my Blanking values are at the stock settings. HyperSpark Ignition for Sniper EFI; Also in Ignition. Sep 17, 2019 · Sniper EFI Tuning & Tech. Never had much issue with the way the car starts, but I had been seeing some recent posts and the excellent article from Chris at EFI System Pro and decided that tuning my cold start was my next EFI adventure. Once you load the software, you will be able to access all “Help” and Installation manuals. However, with a little time and effort, most problems can be successfully diagnosed and resolved. To start viewing messages, select the forum that you want to visit from the selection below. Hooker. It didn't even after resetting the IAC again. With all the start attempts and the fuel primes without starting, your plugs may be soaked. Converting to EFI won’t cure bad valves, damaged head gaskets, worn piston rings, or cracked and leaking vacuum lines. Spark plug wires cannot be of Solid Core Construction – It is recommend to use MSD 8. If replacing the TPS, the TPS sensor is located at the end of the primary throttle shaft, opposite end of the throttle lever. I have added/pulled timing and still have the same issue. My car won't start with my Holley Sniper EFI attached. Hooker BlackHeart. So now like I said I can't get it to start again. 2. I did use these instructions to reset the idle on the truck and the IAC Position is open about 6% at warm idle Jul 28, 2017 · Prestart Checklist. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp RPM Labor Day Sale - Big Savings! Motor Life Events Community Support. Holleys sniper for that looks like it needs 58-60 psi, and those strokers say 55-60. Bill Tichenor. Ran a bit rough, but soon Nov 3, 2022 · I've verified that I have run/cranking power to the Sniper EFI, distributor, and the ignition CDI box/coil. File open Nov 17, 2022 · Ultimately, troubleshooting a Holley Sniper EFI problem requires patience and attention to detail. Here's my issue. The IAC goes to 100% if I try to let it idle on it's own, and still need to stay on the pedal. After the $3500 CAD kit I’m about $1000+ in extras May 14, 2023 · Just went to power up my Sniper for the first time. Since it doesn't start, we really don't know if it needs more or less fuel at this stage. Jan 11, 2020 · The problem is that after setting up the HyperSpark with the Sniper EFI I don't get any spark. Yes, it’s getting fuel. 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. If I move the throttle at all it always returns to 2%. . Jul 23, 2024 · This guide will help you troubleshoot and fix these problems, getting your system back on track. The fuel prime functio n injects a small shot of fuel into the intake manifold 2. Feb 18, 2024 · I've recently installed a Sniper 2 on my 1970 Ford F250 truck, 360 engine. Truck runs fine in Open Loop, but it will not go into Closed Loop. I've installed s Sniper XFlow (model #540-440) along with the HyperSpark system (CDI box, distributor & coil). 1, but as soon as the IAC increases to 100% to try achieve 950 the AFR goes lean to 14. Jan 13, 2024 · I've installed a Sniper EFI with the Holley Dual Sync Distributor and an MSD 6EFI Ignition. Categories / Engine May 16, 2022 · To start viewing messages, select the forum that you want to visit from the selection below. Anything below that and it's fine and above it hangs open. I can see on the screen as it changes to 100%. Street-Strip-Show-AutoX. Shimmy; Jan 15, 2024; For Sale May God's grace bless you in the Lord Jesus Christ. Unfortunately this was my predicament a year ago. All 4 years old with less than 1000 miles. I've never seen the shop I had install my Sniper hook up a lap top to the car. Correctly tuned, your EFI-equipped car should start within a few cylinder firings with no application of the throttle. My car has done this three times over time (not often). From day one, I've been plagued with a situation where the car almost stalls when you come off the throttle (like pulling up to a stop sign). Oct 27, 2021 · I recently installed the Holley Sniper on my SBF 302 in my 1980 Mercury Capri. Jun 5, 2019 · Hey guys. Recently put the Sniper Stealth 4500 on with the Dual Sync distributor and Sniper CDI box. comCheck out the latest tuni Feb 4, 2020 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Says No Data or something like that. Jul 18, 2022 · May God's grace bless you in the Lord Jesus Christ. Jun 14, 2020 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. It felt like it was going to stall out at stop Dec 14, 2017 · May God's grace bless you in the Lord Jesus Christ. Please be aware that this is a community forum. Before starting the engine, double check for leaks, proper wire routing, any wiring hazards or loose nuts and bolts. Features such as metric units, adjustable screen brightness and increased tuning options give users the ability to do even more with their already incredibly capable systems. As soon as a I start the engine, the TPS goes to 2%. Also it has always had this Feb 5, 2024 · May God's grace bless you in the Lord Jesus Christ. I installed a Holley Sniper EFI 2-11-19 on my K5 Blazer with a SBC 360 newly rebuilt mild cam still running an HEI distributor. Jan 25, 2018 · Truck died. Sep 27, 2020 · Hello, looking for some help with my Sniper EFI 4150 4BBL (PN: 550-511) BBC 454 street/strip cam, 11:1 compression. Today I'm going to discuss two different ways you can take a data log using your 3. Any other stuff that uses an RPM signal (tach, shift light, etc. May 24, 2024 · A story with a great ending! I finished my Factory Five Roadster about a year ago. The Sniper EFI calibrates the TPS sensor at every key-on event. ) Check page 22 of the Sniper manual. ). The following is designed to be used as a “Quick Start” guide for some HP and Dominator EFI system May 26, 2024 · Hi All: Last year I bought a heavily modified Porsche 914 with twin turbos, running a Holley Super Sniper. I went The Sniper EFI software and Holley EFI Digital Dash will let you Clear the Learn Table. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Jan 9, 2023 · Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). Across the Aug 14, 2017 · Someday you may need to take a data log from your Sniper EFI system. Won't stay running dies out if I'm not feathering the throttle. Nov 2, 2020 · I've got the Sniper running great when it's warmed up but. , but my idle speed will pretty much match up with whatever I set my idle speed table too. Oct 19, 2021 · May God's grace bless you in the Lord Jesus Christ. 08-09-2018, 06:08 PM. If it behaves normally, repeat, but this time start the car. 5 seconds after the ignition is turned on (which is also the amount of time it takes the 3. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Apr 14, 2021 · Backfires out the Sniper and also out the exhaust. Followed the instructions and did a couple of primes to fill the lines and such. This is my first time posting here. I need some help troubleshooting a problem. 2 block, Eagle 3. I have an original style coil, so I used the Non-Timing Jun 9, 2024 · May God's grace bless you in the Lord Jesus Christ. 5) Pull some plugs. Feb 8, 2021 · I am going to write this specific to Holley’s Sniper and Terminator X throttle body EFI systems but most of this is going to apply to some degree to all advanced EFI systems intended for street use. Before the battery change, I would turn the key and the engine would start instantly. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Feb 26, 2022 · To start viewing messages, select the forum that you want to visit from the selection below. Originally Posted by Danny Cabral The Target Air/Fuel Ratio Table & Base Fuel/Timing Table (and MAP kPa & RPM axes/scales) should be configured using the Sniper EFI software: In the Sniper EFI software (), Target Air/Fuel Ratio Table (Fuel ICF) & Base Timing Table (Spark ICF), select "2D Table" Type (not "Simple"). 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Apr 24, 2014 · This contains detailed information on how to use Holley EFI software and perform tuning that is included within the software itself. It won't communicate with a laptop either. Ran fine, but it sits a lot and one knows that carbs don't like to sit, that's why I bought the Sniper EFI system. My situation is I installed the 4150 Sniper on a 402 Chevy BB with a 5 speed manual transmission in a '72 C10 pickup. If this is your first visit, Won't start, SNIPER says, "Could not get current path aborting the load. I've narrowed it down to the fact that the IAC isn't opening soon enough. I’ve had my Sniper EFI on my Chevelle for approximately one year. If it shuts down normally, the Sniper is likely OK. Won't start if I reach through window, need to feather the throttle like a carb. When it does run, yes you guessed it (feathering throttle). My engine is the 572 ci crate from Ford Performance, I'll attach the build sheet if cam specs & such are helpful. I changed the battery last week and now the engine turns over but does not fire. I checked it when it idled and it's 15° as recommended. It's a stock engine the I added a Holley performance intake to. May 26, 2022 · I have the Sniper EFI 2BBL on a 4. The broad consensus has been that the Sniper is an amazingly straight-forward install and starts and tunes as expected. I also tried jumping the battery w no luck. I thought maybe my Config Jun 30, 2023 · Engine won't start, cranks over fine, but won't fire when the engine is what I call hot (180°F) and heat sink has set in after sitting for 20 minutes or more. May God's grace bless you in the Lord Jesus Christ. Apr 11, 2022 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FTI Comp Ported intake May 13, 2020 · Sniper EFI Tuning & Tech. 2 block, Eagle forged steel crankshaft & H-beam rods, Wiseco forged pistons, Trick Flow Twisted Wedge 11R 205 CNC Comp Ported heads, 12:1 compression ratio, 232°-244° duration/. Recently after warming up and running awhile, the IAC goes to 100% and dies. I have the HyperSpark coil & distributor. Aug 9, 2018 · #1. My EFI doesn't detect any RPM. It felt like it was flooding out at low speed, low RPM. Whether it starts or not, stop the datalog before turning off the ignition. I setup the distributor with the rotor, pointing at the number one cylinder, and the distributor is also locked out so they Sniper will handle the timing. What can cause this to the IAC, or does the ECU have to tell it to move. Can anyone give Mar 8, 2020 · May God's grace bless you in the Lord Jesus Christ. May 7, 2021 · May God's grace bless you in the Lord Jesus Christ. Apr 5, 2024 · Hello everyone. Dec 8, 2020 · I used the idle speed table to set my idle speeds at different temperatures. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Dec 12, 2022 · Hey guys. Aug 5, 2022 · Sniper EFI Tuning & Tech. You need to be capable of creating Datalogs of the problems and copying your Sniper Configuration File from the SD card and posting them all here for analysis. I tweaked a whole bunch of other parameters - Startup Enrichment, After Start Hold Off, Coolant Temperature Enrichment, Idle Ramp Speed Decay, etc. battery shows 12. I drove the car this weekend and everything was fine (except horrible MPG). I changed the Cranking Fuel lbs from 7 to 19, stopping at 10, & 14. On to the first start. Apr 11, 2022 · To start viewing messages, select the forum that you want to visit from the selection below. May 7, 2017 · Cold start was always good, my fan was set to come on 165 and as soon as it kicked on, it heat soaked the sensor and I'd start loosing crank pulses. The IAC goes into the 20-40% range and kills the engine. Aug 4, 2023 · Holley EFI. The battery voltage on the Sniper is read from the pink wire. Aug 31, 2023 · Did a Sniper swap on my '69 Camaro, originally with the ignition that was on the car (HEI) and then added the HyperSpark distributor & module. It's wired as shown in the attached diagram (checked about ten times with multiple people checking it). May 30, 2017 · Temp is over 160°F, and Fuel & Closed Loop are enabled. It almost stalls, then catches Aug 2, 2022 · This doesn't change the way the Sniper operates, but it'll provide more fuel. I'm having issues with the car cranking hard, I've checked the timing and it matches tune vs actual. SOLD NEW Holley Sniper EFI 550-511. Dec 7, 2021 · Holley via Facebook asked earlier what was going on with the three dots at the bottom left of the screen which sequence/cycle grey to green for the first 26 seconds after the handheld boots, then start sequencing or cycling grey to blue and continue to do so until the handheld is powered off again by removing +12V from the pink wire. 3) If you have a radical cam (please post specs) the low vacuum (high kPa) values are hurting you with your timing. In video you can hear the Holley fuel pump in tank boot up and working but no Apr 18, 2022 · May God's grace bless you in the Lord Jesus Christ. Starts up. I have a moderate understanding of the Cranking parameters, After Start, I've been running the Sniper Master Kit 550-511K on a ZZ502 for about 2 years now. You may have to register before you can post: click the register link above to proceed. Tanks INC EFI fuel tank and pump. Fuel Delivery; The Holley Sniper EFI is a great fuel injection system for many automotive applications. I recently finished my Factory Five Roadster and I'm running a Sniper on a Ford Racing 302. 470" forged steel crankshaft & H-beam rods, Wiseco 4. 5" TSLCD. Touch the gas and it'll want to backfire and spit gas out the Sniper. It's hard to crank and you have to keep you foot on the accelerator pedal to keep it going. The Sniper EFI is fuel only at this time. 91 gears and a Tru-Track, UMI suspension with Konis, big brakes, 6-point roll bar, lowered, Boze Forged 18 Oct 10, 2018 · (If the Sniper does not get a RPM signal, it will not inject fuel. ) with the Sniper HyperSpark CD box & Distributor and it's been running great. Ever since day one I've been having hard starting issues when both hot & cold that I could use some advice on. It only happens above 1800ish RPM. Once running, drives and starts fine. The handheld isn't communicating with the ECU. Sniper EFI software was designed to make navigation simple and easy. Nov 30, 2021 · When the coolant temperature isn't correct, the Sniper won't provide the proper fuel for a cold start and the CTS will actually read low at higher temperatures which may prevent learning. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Jul 30, 2022 · May God's grace bless you in the Lord Jesus Christ. Jun 22, 2014 · holley efi wont start any ideas Jump to Latest 20K views 23 replies 13 participants last post by boo00st Aug 17, 2015 Jul 25, 2023 · To start viewing messages, select the forum that you want to visit from the selection below. Dec 2, 2009 · Quick Start Tuning. Dec 10, 2022 · See if the Sniper turns on, runs the pump, and primes. It was running rough and leaking oil, so I decided to pull the engine and rebuild it (all new seals, clutch/flywheel, plugs, etc. The Sniper EFI development team invests a lot of time and effort in adding functionality to their throttle body fuel injection systems. Basically, cold I have it at 1400 and by 165°F it's set to 800. Another Holley Sniper won't start after install. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Ported intake, BBK 80mm Feb 6, 2022 · Sniper EFI Tuning & Tech. Jun 7, 2021 · When it is hot and it won't start, do you have spark? Lot of ignition parts can fail when hot. I was wondering about the coil wire causing this problem. Seems to do it if it's sit for an extended period. From stopping fuel starvation to fixing backfires, we’ve got solutions. Does anyone have any Mar 16, 2024 · To start viewing messages, select the forum that you want to visit from the selection below. 38 using a multi meter and you can see what start sounds like in video below. This is a great time to visually inspect the overall Sniper EFI install. It's slotted, so install it in the same position. 6 volts while not cranking. 623" lift/114° LSA H/R camshaft, Trick Flow R-Series FlowTech Induction Comp Apr 7, 2019 · Sniper EFI Tuning & Tech. No start, doing the same thing like it’s getting no spark. ) has to be moved from COIL− to the dark brown tach output wire on the Sniper. I'm very new at this system. Hi, I need some help. A strong high 13s to low 14s after startup seems to keep the Sniper happy. 5" TSLCD and the ECU, the ECU is not getting power, or the ECU is bricked. Car has a Holley Sniper EFI with electronic distrib, new starter, new ignition, and new solenoid. Wondering if someone can analyse datalogs. It runs SO rich. Mar 18, 2019 · Fuel Prime Enable F uel prime is an option that is enabled by default in all of the base calibrations. Jun 3, 2021 · Agreed Patrick. elitetunedschool. The HyperSpark is plugged into the green and purple connector and has clean ignition power. Installed a new MSD coil, Cap/Rotor, and HEAT Ignition module. Hi, I'm new to the sight and at my end with this Sniper. Should I erase the SD card and download everything again? Mar 18, 2024 · Intermittent issues until two days ago when I fix the wire issue with new leads. To do this, open up the Initial Startup gauge screen that was used in section 17. eukmff fhdd kygvwg wru gjxo zkih zcjex qgnph fivfgup frron