IIBRONCOS
Member
- Joined
- Jan 24, 2017
- Messages
- 134
- Reaction score
- 11
- Points
- 18
- Location
- AZ
- Vehicle Year
- 1988
- Make / Model
- Ford
- Engine Size
- 2.9
- Transmission
- Automatic
1988 B2 2.9 auto trans. No engine codes and runs excellent when warm. Every time I do a cold start the engine starts very quickly and then immediately starts to jump up and down in RPM's. It will go to 1200 rpm's and then jump back and forth to 500 rpm's real quickly ( engine rocking back and forth ). After about 2 minutes it completely stops and runs great when warm and fully warmed up.
47,000 orig miles and all sensors replaced except IAC (cleaned) and ACT (cleaned). I have also cleaned all grounds I could find.
Any ideas would be appreciated.
47,000 orig miles and all sensors replaced except IAC (cleaned) and ACT (cleaned). I have also cleaned all grounds I could find.
Any ideas would be appreciated.