Cees Klumper
New member
- Joined
- Nov 4, 2019
- Messages
- 23
- Reaction score
- 9
- Points
- 3
- Vehicle Year
- 1990
- Vehicle
- Bronco II 2WD
After buying my '90 Bronco II (2.9 EFI V6) here in southern California last October, an original survivor with about 130K miles on the clock, I finally ironed out the various issues, and it's a very good feeling!
When I got it, it ran very poor when cold and only so-so when up to operating temperature. The main things that I found cured all the rough stuff, were:
It now idles and runs very smoothly, and accellerates surprisingly fast, for such a heavy truck. It pulls much stronger than before, especially after I fitted the rebuilt injectors this afternoon. It was always a joy to drive, but now it's positively quick. The rebuilt (Bosch) injectors were less than $60 delivered, best $60 I spent on the car. Before, there was a marked 'dip' when accellerating beyond say 60% throttle, unless you really floored it, then it would sort of take off. Now it's strong throughout the range.
Other things I replaced:
Don't hesitate to try a set of fresh injectors. I did put on new seals etc on my old ones, but that did not help.
When I got it, it ran very poor when cold and only so-so when up to operating temperature. The main things that I found cured all the rough stuff, were:
- installing a new fuel pressure regulator
- fitting 6 rebuilt, flow-matched injectors
- calibrating the idle stop-screw on the air intake flap
It now idles and runs very smoothly, and accellerates surprisingly fast, for such a heavy truck. It pulls much stronger than before, especially after I fitted the rebuilt injectors this afternoon. It was always a joy to drive, but now it's positively quick. The rebuilt (Bosch) injectors were less than $60 delivered, best $60 I spent on the car. Before, there was a marked 'dip' when accellerating beyond say 60% throttle, unless you really floored it, then it would sort of take off. Now it's strong throughout the range.
Other things I replaced:
- all ignition parts except the distributor itself and the coil
- the MAF, coolant temp sensor, and TPS
- assorted vacuum lines
- the PCV valve and collection canister
- the PO had put in a new fuel pump and filter, and air filter
- replaced the intake manifold gaskets
Don't hesitate to try a set of fresh injectors. I did put on new seals etc on my old ones, but that did not help.