I HAVE A 1995 GMC 1500 WITH A 305 V8 WITH ONLY ...

1995 GMC C1500



March, 22, 2013 AT 3:31 AM

I have a 1995 gmc 1500 with a 305 v8 with only 80000 miles on it and when I start it in the morning it idles at about 1500 and doesn't come down till I drive it for about 15 minutes and then it runs good at about 500 Rpms and it shifts higher too when I drive it for about 15 minutes then that comes back too normal too I tried changing the temperature sensor and no different and when I put the heater too defrost only I find it revs the engine up a little too can anyone help me thanks

1 Answer



March, 22, 2013 AT 2:12 PM

Check for vacuum leaks if tbi at base and rear of tbi unit with choke cleaner. Also check hoses leadingto map sensor if tbi. It will rev faster with defores t because your a/c is working made to do that.

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