some times when iam beatin on her pretty good comp on 5x5 and i pull up to a stop light and push the clutch in and let it idle it will hunt like an old detriot and then rev it up once and it idles fine. but then yesterday it did this to me driving normall with the comp on 3x3. have no codes
thanx scott

 

My truck has had a funny idle since I bought it. Sometimes if fluctuates by 50-100 rpm. Sometimes if I tap the throttle it goes away other times it won't.

 

My truck did that until I replaced the crank sensor, and gone.