Engine Over REVs on its own!!!

lucheski · 11-26-2004, 10:28 PM

My problem is this: Sometimes when I shift between 5300-6000RPM the moment I push the clutch in, the engine flares beyond 6500 (off the gauge) and hangs there, if I shift before 5000-5200 it will never do this. the only thing that stops the engine flare is turning off the engine, when I turn it back on again its fine.

What is strange it did this with a completely stock engine as well, before I put my combo listed below in there.

What would cause the throttle to conditionally stick only between those RPMs?

LX5liter · 11-27-2004, 09:41 AM

The only thing I can think of right now is a weak throttle return spring. The airflow at the higher RPM could be holding the throttle body open.

USMC302 · 12-09-2004, 02:02 PM

Also slight symptoms of an extreme vacuum leak.

lucheski · 12-09-2004, 03:38 PM

the pedal was getting caught in the carpet, i cutout the carpet around the pedal and it hasnt done it since

USMC302 · 12-09-2004, 03:43 PM

who woulda thunk it

Ieatcamaros · 12-09-2004, 05:51 PM

At least it was simple and cheap to fix.

11-26-2004, 10:28 PM	#1
lucheski Registered Member Join Date: May 2004 Location: Tennessee Posts: 21	Engine Over REVs on its own!!! My problem is this: Sometimes when I shift between 5300-6000RPM the moment I push the clutch in, the engine flares beyond 6500 (off the gauge) and hangs there, if I shift before 5000-5200 it will never do this. the only thing that stops the engine flare is turning off the engine, when I turn it back on again its fine. What is strange it did this with a completely stock engine as well, before I put my combo listed below in there. What would cause the throttle to conditionally stick only between those RPMs? __________________ 306,Hyper Pistons,Edelbrock Performer RPM "Typhoon" Intake (Ported), 1969 351W Heads (ported) 60cc combustion chambers machined to 50cc, 10:1 Compression Ratio, F-303 Cam, Harland Sharp 1.6 Ratio Roller Rockers, A9L ECU, 70MM Cobra MAF, 24lb/hr Injectors, MAC Equal Length Headers, MAC Offroad H-Pipe with Flowmaster Mufflers, 3.55 Posi Rearend...dreaming of 12s, need to run it

11-27-2004, 09:41 AM	#2
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	Re: Engine Over REVs on its own!!! The only thing I can think of right now is a weak throttle return spring. The airflow at the higher RPM could be holding the throttle body open. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

12-09-2004, 02:02 PM	#3
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Engine Over REVs on its own!!! Also slight symptoms of an extreme vacuum leak. __________________

12-09-2004, 03:38 PM	#4
lucheski Registered Member Join Date: May 2004 Location: Tennessee Posts: 21	Re: Engine Over REVs on its own!!! the pedal was getting caught in the carpet, i cutout the carpet around the pedal and it hasnt done it since __________________ 306,Hyper Pistons,Edelbrock Performer RPM "Typhoon" Intake (Ported), 1969 351W Heads (ported) 60cc combustion chambers machined to 50cc, 10:1 Compression Ratio, F-303 Cam, Harland Sharp 1.6 Ratio Roller Rockers, A9L ECU, 70MM Cobra MAF, 24lb/hr Injectors, MAC Equal Length Headers, MAC Offroad H-Pipe with Flowmaster Mufflers, 3.55 Posi Rearend...dreaming of 12s, need to run it

12-09-2004, 03:43 PM	#5
USMC302 Registered Member Join Date: Apr 2001 Location: Gallatin, Tn Posts: 1,326	Re: Engine Over REVs on its own!!! who woulda thunk it __________________

12-09-2004, 05:51 PM	#6
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: Engine Over REVs on its own!!! At least it was simple and cheap to fix. __________________ The sig says it all.

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