scubacarib
Junior Member
- Joined
- Jan 24, 2015
- Posts
- 12
- Reaction score
- 1
- Location
- bastrop tx
- First Name
- john
- Truck Year
- 77
- Truck Model
- c15
- Engine Size
- 350
So I am helping my friend with a 91 Cheyenne 2500 it has a 350 Chevy he has thrown a lot of parts at it both temperature sensors throttle positioning sensor and idle speed control to me it acts like a cold start high idle after it starts cold then after a few minutes it drops to a normal good idle drive it around the block turn off the key start it right back up high idle for the couple of minutes then it drops to a perfectly good idle it'll do this all day long any ideas would be appreciated thanks