Engine speeds up and down. on 2001 Ford Mustang

Engine seems to speed up and slow down even after it warms up. I read somewhere that something dealing with the throttle body needed removing and cleaning with carburator cleaner. Can anyone explain exactly what needs to be done?

by in Comer, GA on November 05, 2010
1 answer
ANSWER by on November 05, 2010
the deposits at the throttlr plate can cause this kind of issue more than that, the idle air valve is a more common failure. have it check for operation. Roy
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Changed fuel filter, air filter. No luck. Changed plugs and wires. Big improvements at low speed. Still won't get up and go. Could it be a coil or catalytic convertor ? Check engine light is on.

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