1993 Ford Thunderbird

"mwaidner51963" wrote: > My car is revving @2500 rpms in idle. I have replaced the idle > air control > sensor, the mass air sensor and the throttle sensor. It also > had a vaccuum > leak and the o rings on the fuel injectors were all replaced > as well as all > the intake gaskets. It ran fine for about an hour but now is > still running > at 2500 rpms. HELP?!

What size engine?

Disconnect the IAC valve with the engine running. Does the engine speed drop? If so look for a problem in the computer system, a trouble code scan and diagnosis will probably be needed. If the engine speed stays about the same after disconnecting the IAC valve look for a mechanical problem such as a binding throttle linkage, sticking IAC valve or a large vacuum leak.

Vent_7 opined in news:41e33012$1 snipped-for-privacy@alt.athenanews.com:

I assume there's no codes?

1. Check/ change your pcv valve

1. Disconnect all vacuum lines -except fuel pressure regulator- and plug the intake nipples for them

It is a 6 cylinder engine 3.0 I think. When they hooked it up to the computer it flashed all kinds of codes. They are thinking it must be the computer is bad-they have tried everything else they can think of. Thanks for your input.

MarieRP opined in news: snipped-for-privacy@localhost.talkaboutautos.com:

Well,........ good luck.

sheesh!