Idles fast at times

PEANUTS54

MEMBER
1991 CHEVROLET SILVERADO
175,000 MILES

I have replaced the throttle position sensor and the idle air control valve. Could it be the water temp sensor?

Thursday, September 15th, 2011 AT 11:48 PM

2 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

The temp sensor tells the computer how to adjust air / fuel mixture. It could, but it is unlikely. Have you checked for vacuum leaks? If not, I recommend it.

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