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1992 Ford Thunderbird Other - General
Question: When I have the car in (P) it runs smoothly and idles nicely, as soon as I put the car in (D) or (R) it revs and tries to accelerate (rpms jump). I actually have to push the brake down really hard for the car not to jump forward. Any clue at all what could be wrong?!
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Technican: Disconnect electrical connector at idle speed motor. Now shift into drive. Does problem disappear?
Technican: Also check with your local Ford service department to see if there is a recall that applies to your car.
Owner: First, I'm sorry for the late reply. Second, I should have added that I have no clue about cars whatsoever. Where would I find that connector to unplug it? Here's a diagram in a book which I ordered off of amazon... -> amazon.com/exec/obidos/tg/detail/-/1563923114/ref=lib_rd_ss_TT05/002-2967320-7791257?v=glance&s=books&vi=reader&img=10#reader-link
Also, what's the idle speed motor do? Can I just unplug it and live happily ever after? If not, what should I expect to pay for a repair? Thanks a bunch for your help!!
Technican: The idle speed motor controls the idle by adjusting how much air passes through during closed throttle. The computer controls the adjustment of the idle speed motor.
You can't really just unplug it. A sensor could be giving the computer incorrect input, and the computer in turn may be commanded the idle speed motor to act like this. And, you would lose the desirable functions. Like engine idling faster when cold as it need to, idling up when you turn on air cond, etc. And lastly it would turn on the check engine light, which you don't want.
You can unplug it for testing purposes. And to allow the engine to run safely enough to reach repair station.
If you e-mail me I'll send you info on the idle speed motor and possible cost to repair.
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