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Holley sniper stumbles on acceleration

Nettet15. apr. 2016 · Re: hesitation during light throttle acceleration.....750 ho. by BigBlocksOnTop2 » Thu Apr 14, 2016 2:39 am. Big heads and big intake....may try more accelerator pump shot. A quicky would be to try a low speed bleed .006-.008 smaller to see if throttle response is helped. The AEM wide band would be nice. Nettet20. jun. 2024 · Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table (enrich or lean) & Base Timing Table (optimize ignition timing). I find the most helpful datalog function, is overlaying the datalog on your Config File.

Holley Sniper EFI adjustments - YouTube

Nettet5. jul. 2006 · During wide-open acceleration, right before I go to shift from 1st to 2nd (4500 - 5000 RPM's), the car falls flat on its face. The car acts like the gas was turned off - no sputtering or backfiring - it just stops accelerating and slows down. When I proceed to shift into 2nd and get back on it, and the car briefly pulls hard, and then stumbles ... Nettet3. feb. 2024 · The Sniper is operating perfectly during all temperatures with all functions; startup, idle, acceleration and driving under load, with the exception of when I move … black dashboard pro react https://aten-eco.com

Sniper EFI Backfire - Holley Performance Products Forums

Nettet11. mar. 2016 · Check the TPS switch and the IAC motor. As you can see, FAST systems are unreliable garbage and hard to diagnose. I switched to Holley Sniper XFLOW and junked the EZ EFI 2.0 and the FAST … Nettet27. jun. 2024 · There have been ECU firmware updates since then, and consequently the Sniper EFI AE vs TPS RoC Blanking threshold value has been decreased to "7" … Nettet1. des. 2024 · Poor acceleration may be fuel related but could also be due to incorrect timing. The default timing setup on the Sniper is very poor and there are certain … black dashboard pro angular

Acceleration Stumbles - Holley Performance Products Forums

Category:Car goes extremely lean on moderate acceleration. - Holley …

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Holley sniper stumbles on acceleration

Dead Punch Stumble - Holley Performance Products Forums

Nettet2. aug. 2024 · For TWO YEARS Since installing my Sniper Stealth 4150 (Holley 550-871) on my small block Camaro, I've been chasing hard start cold or hot issues. Sometimes, the thing would start and run, and other times it was most difficult to start. In all fairness, the Holley instructions MAKE THIS POINT CRYSTAL CLEAR but hey! Nettet9. nov. 2024 · Using the Holley Sniper EFI software (LINK), look at where the live cursor moves to during this occurrence, and manually tune that area of the Base Fuel Table …

Holley sniper stumbles on acceleration

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Nettet23. apr. 2024 · However, after about four or five miles of driving (always seems to be the same distance) the engine is stumbling and sometimes backfires and seems to be missing. This happens from idle to about 2000 RPM under load. Sometimes even up to 2500 RPM and then when you let off the gas, it starts idling high again around 2000. Nettet19. mai 2013 · It's prollably the accelerator pump but be sure the secondaries aren't trying to open too soon. A smaller shooter will extend the pump shot duration. That could help if the engine were to hit hard then lay down shortly after.

Nettet6. mar. 2024 · There can be stumble issues if they open too early especially since the Sniper hasn't turned on the rear injectors yet. I'm trying to find what the TPS percent … Nettet20. jan. 2012 · Trying to figure out my lean stumble when flooring it quickly. The engine is a 350 with Vortec heads, Comp 268H cam, air-gap intake, and new Holley 4160 …

Nettet711 38K views 2 years ago hesitation on acceleration carburetor Episode 480 We need to take our 1964 Falcon to the drag strip to get a base line for future modifications. But a hesitation in the... Nettet13. mai 2014 · The Holley accelerator pump assembly that consist of the pump diaphragm, pump cam and pump nozzle. Start by checking the adjustment of the accelerator pump …

Nettet22. mar. 2015 · The stumble that i hear when u start from a dead stop could be in your accelerator pump adjustment. Try moving linkage on the pump arm and see if it helps. Also check you coil output HEIs should jump at least an inch gap. I have tried all settings per the edlebrock tuning guide with no luck. The coil is working very well and is very strong. 0 0

Nettet5. jul. 2012 · Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly. If your car or truck … gambit pro backpack reviewNettet19. jan. 2012 · I'm having a hard time tuning my Holley 4150 on my 1970 Z28 I recently had Hooker Super Comp Headers installed along with a Pypes 2.5" exhaust with cross-pipe to a single traverse muffler. Since these upgrades were completed my carburetor is having all kinds of issues. It stumbles between 1000 and 1500 rpms and runs … gambit products ltdNettet19. mai 2024 · Ive been running a Holley Sniper for a about four years now. In the last year I have been struggling to fix a consistent hesitation I get under acceleration after … black dashboard cover