Sniper goes dead lean right off idle

Author: ttwa

August undefined, 2024

Web22 Nov 2024 · That's what you need to keep an eye on since the idle fuel pressure might be fine while fuel pressure at WOT is too low. 600 HP requires 300 lbs of fuel per hour or 50 … Web24 Apr 2024 · Secondary throttle blades completely closed. All 4 throttle blades are drilled. Idle mixture screws give best vacuum - 16 inches. All for idle mixture screws set at 7/8 turns out from seated. Idles at 1100 rpm. I can’t lower the rpms without closing the primary throttle blades and block off all of the transfer slot.

Solving Holley Sniper High Idle Issues - EFISystemPro.com

Web18 Jan 2013 · The engine idles nicely and has the most vacuum with the carb dialed in around 13.5-14 afr, but just verily crack the throttle and it goes dead lean 16-18afr. After I … Web9 Dec 2024 · It seems like the Sniper is trying to control idle and closing the IAC to bring RPM down. But at that time the RPM are at 2200 down to 1800. So idle control shouldn't be active correct? Is correcting the lean spike as simple as adding fuel to that area of the table since it's in deceleration and not Learning at that point? caerphilly mountain burger shack

Car goes dead lean off idle to WOT, Holley Super Sniper 8 …

Web17 Mar 2024 · Now go manually add fuel to the same area of your fuel table all the way back to just below where your idle is to eliminate the mismatch because as we know it will not compensate or learn those areas upon deceleration. Add fuel in 5 lbm/hr increments and then note the mismatch. Adjust as necessary. See if it still stalls. Web20 Dec 2024 · Once I knew timing was where I wanted it (12* BTDC) I tuned the idle, TPS, and IAC for about an hour to get the right values. All that was involved was tuning the idle until the IAC was somewhere around 10%, turning the truck off to reset the TPS back to zero (it resets when powered off) and starting the truck again to watch the idle RPM (850- ish), … Web4 Sep 2024 · Your idle timing may be a bit high at 25° and going above idle the engine may not like 25° to 29° of timing. This can also cause a bit of a stumble. I would recommend … c meaning in school

How To Cure Carburetor Stumble - Holley Motor Life

Holley Sniper hesitation/bog on sharp accel Team Chevelle

Web7 Dec 2024 · AFR Lean Spikes at Idle. 12-07-2024, 06:18 PM. Hello everyone, I'm having some lean AFR spikes during hot idle. I'm using my Holley Sniper on a 1973 VW Super … Web19 Apr 2004 · The quad runs great except for a dead spot right off of idle. It runs great at wide open throttle. No hesitation upon deceleration. Accelerates great. But if I give it just a … caerphilly mpsWeb24 Dec 2016 · Jeez Bob, You need to go play the lottery! I think it's the 02 sensor also. My son's fuel pump quit right in the driveway. Came home from school shut it off next … caerphilly miners hospital history

"Web31 May 2024 · Don’t Stumble. With throttle body–-style EFI, if the engine idles decently but stumbles slightly off idle, try adjusting the idle and / or cruise air/-fuel ratio slightly richer. This can help overcome an off-idle stumble. This assumes that the ignition system has sufficient initial timing. " - Sniper goes dead lean right off idle

Sniper goes dead lean right off idle

Symptoms of Lean or Rich carb settings on a motorcycle

Web29 Mar 2016 · It goes DEAD LEAN as soon as I try to pull out of the driveway! It basically dies and lean pops through the intake. It absolutely runs like a pile of crap!!! I'm using the … WebIDLE / LIGHT CRUISE: 13.5 AFR - target with GREEN mode ... 13.5 AFR (off-road vehicles) Most stock to slightly modified engines will run just fine at an AFR of 14.5:1 and yield better MPG. If you prefer better PERFORMANCE then we suggest to run an AFR of 13.5:1 or even richer to around 13:1. ... Mode, Left and Right Buttons - Buttons are used ...

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Web18 Apr 2024 · One thing I noticed is that with any partial throttle, the timing control readout shows the timing going to the "cruise" setting. Timing settings are 15 degrees at idle, 30 WOT, 32 cruise. Timing is verified with a light, fuel pressure is good, idles well. 72 Chevelle Malibu Muncie M20 SBC 406 KB Pistons PW Aluminum heads RPM Air Gap Intake Web11 Oct 2024 · For example, there is one case at 1000 RPM where the timing is 23° at idle and then jumps to 34° at 1000 RPM at about 90 kPa. This can cause poor running or a misfire that will cause a false lean reading at the WBO2 sensor and then system tries to keep up …

Web19 May 2024 · This fixed the high throttle position sensor reading (TPS) of above 1% that likely caused my idle issues 4. Used a shopvac on blow attached to the muffler, and with … Web14 Aug 2024 · Idle is set at 725 rpm Click to expand... Hello. If tweaking the Acceleration Enrichment doesn't clear it up you might just need to wait for it to do some more learning. And if that doesn't work out you might need to do some hand-tuning on the laptop. When you hammer it, watch the air-fuel mixture display and see if it's going rich or lean.

Web16 May 2008 · reinstall the carburetor and setup your idle system. Before you start the engine, examine the fuel bowl side of the throttle body. Hopefully you'll see a little tube, covered by a rubber plug. This vacuum port connects with a passage in the throttle body that 'sees' manifold vacuum. Web5 Jul 2012 · This assembly delivers an initial shot of fuel in the right amount, and duration, to provide crisp throttle response right off idle. Hesitation, backfire and lean conditions can …

Web21 Apr 2024 · Make sure you wire the ground and power feed from the sniper directly to the battery. Not thru the starter, not thru the solenoid, not sharing a ground with anything. Directly to the battery. This will eliminate 95% of EMI/interfence/power/voltage issues. 2. I have tried several intake manifolds and both are dual plane.

Web25 Mar 2015 · Some of your PE functions need work. (you have a 3200 rpm delay combined with 100% TPS, Not bueno for reving or WOT). Your spark tables need work as well. Your MAF is partially failed. Your TPS needs to be reset or your TB position screw is off or cable is hanging, probably just needs to be reset. caerphilly mountain road c meaning in addressWeb3 Dec 2024 · What would cause the Sniper to lean out when cruising? I have set it to 12.5 at WOT, 13.5 at cruise & 14.7 at idle. When coasting along it will suddenly lean out causing … caerphilly mountain view ranchWeb2 Aug 2024 · So if the +12 Volts "goes away" during the crucial start cycle the EFI ECU is essentially "Brain Dead" seemingly at this point. So, yea it gonna ALWAYS be hard to start! TL/DR (Too Long/Didn't Read) MAKE ABSOLUTELY CERTAIN that the switched +12v you hook the PINK WIRE up to on the Holley 550-871 4150 Sniper Stealth system is connected … caerphilly mountain walksWeb11 Aug 2024 · With the engine at full operating temperature you should be able to stick your finger in the IAC inlet port on top of the throttle body and the engine should simply idle down about 50 RPM below your programmed idle speed. If it dies or drops more than 50-75 RPM the throttle is closed too far. c. meaning in textWeb24 Dec 2016 · Jeez Bob, You need to go play the lottery! I think it's the 02 sensor also. My son's fuel pump quit right in the driveway. Came home from school shut it off next morning , nothing. Same truck, I was cleaning the throttle body started it up, gave it a quick blip of the throttle, POP dead as a door nail. Turned out to be the dizzy gear. caerphillymsWeb8 Mar 2010 · The transition circuit is fed by the idle feed restrictions and controlled as well by the idle air bleeds, by lowering the idle air bleeds you will enrichen the transition circuit … caerphilly mp