Jobey
Newbie
So I have a 96 w/t c1500 4.3 5 spd. I’ve owned this truck for almost 2 years now and put right out 100,000 miles on it. Gradually over time it started getting a high idle as I was slowing down but as soon as I come to a complete stop it will drop down to normal. It would rev up slightly then die back down to normal when it starts up as well,which I always thought was basically normal. Well, this morning when I fired it up it was idling at 5-600. After it warms up it would be maybe 650. Also whenever I was taking off it would backfire slightly between shifts and also when downshifting. Does anyone know what might be the cause of this? It’s never backfired before.