"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.