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Ford Thunderbird

I have a 1992 ford thunderbird 3.8 litre with 130,000 miles. The car ran fine one day I started it and the idle went to 2500 rpm's I changed the M.A.S. No help changed the T.P.S. No help any suggestions on what to do next?
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Tlaw111
August 4, 2007.



Could be coked-up throttle plate and an ISC device-take it out and clean. Could also be a vacuum leak.

Rasmataz
Aug 13, 2007.