1987 GMC Jimmy
Automobile Hoarder
- Joined
- Jan 23, 2016
- Posts
- 5,848
- Reaction score
- 2,387
- Location
- Mississippi
- First Name
- Jesse
- Truck Year
- 1987
- Truck Model
- V1500 Jimmy
- Engine Size
- 350
I've gotten back to working on my Jimmy. I replaced the old IAC valve a while back to see if that would get the idle down to a lower stepper count than it was. Well, after fixing a bear of a transmission leak, I'm trying to run the truck. It's stinky rich, it's idling at like highway RPM, and it runs pretty rough. I tracked down the engine vacuum leaks. The TBI was leaking vacuum, and I had it rebushed. The PCV seal was leaking, and I replaced it. There shouldn't be anything else, right? I can hear a constant hiss under the dash when sitting in the car. I'm scared the brakes have some kind of vacuum leak. Do I need to drive it around to set the IAC right? I did the reset procedure correctly. I cannot figure out how to get this thing running right. I've come close but never right on the money.