2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

motor over reving on its own???????

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Old Apr 12, 2008 | 08:57 PM
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From: [REDACTED]
motor over reving on its own???????

so took the Fc to the parkin lot again and full throttled it, picked up boost quick as hell and popped about 12 lbs-ish(ops didnt turn down the boost controller)
i was at 6-7k rpms and when i let off the rpms shot up on there own to maybe 8k or so and help for a sec. or two, still did it after i droped the boost way down

any one have a similar thing happen to them
whats it caused by
what do i need to do to fix it

Last edited by R.O.D; Apr 12, 2008 at 09:22 PM. Reason: not a good title
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Old Apr 13, 2008 | 04:44 AM
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From: n
Throttle jammed open...
Were you ******* with the UIM, TB, or cruise control recently?


-Ted
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Old Apr 13, 2008 | 03:00 PM
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i did have to slit the uim the get rid of the emissions crap
as far as the TB i dont know if i messed with anything in there but i'll def look
could i just wD40 the componets
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Old Apr 13, 2008 | 03:10 PM
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From: n
What exactly did you remove?
If you messed with the fast idle thermowax, did you remove the fast idle cam too?

If you removed the UIM, there's a good chance the throttle cable got twisted.
If this is the case, you can remove the throttle cable by itself and get it untwisted.
To do this, it helps to have a helper in the car.
Once you remove the throttle cable, pull on one end.
Have your helper step on the gas pedal slowly.
This will cause the end to retract.
Do this several times and the cable should untwist itself.
Once the cable is untwisted, then put back the cable onto the TB as carefully as possible without twisting the end.


-Ted
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Old Apr 13, 2008 | 03:13 PM
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i took off the whole vac ratsnest, i didnt mess with the therowax or the fast idle cam
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