- Joined
- Jan 23, 2011
- Messages
- 730
- Reaction score
- 976
- Points
- 93
- Location
- Bronson Michigan
- Vehicle Year
- 1985
- Make / Model
- Ford Bronco II
- Engine Type
- 2.8 V6
- Engine Size
- 2.8
- Transmission
- Manual
- 2WD / 4WD
- 4WD
- Total Lift
- 6” skyjacker 2” body
- Tire Size
- 33x12.5
I’ve been working on an old abandoned 85 BII 2.8. Got it running a rolling and started working on drivability. No CEL but I looked anyway. I got 21,31,54,83,84,87 and continues men 18.41,54,63. I got them narrowed down to the 18 and 63 in continuous mem.
I’ve checked wire condition from the dizzy looks fine. It looks like the ECM has been replaced. Says 85 Bronco II 2.8 in yellow marker across the face. When I set timing to 10 degrees BTC and plug the spout back in, the idol picks up as it should. I shine my light on timing marks and see it has advanced and moves around if I rev the engine. All looks normal. Still drives like crap. No power, occasional backfire. Pull the codes and that 18 and 63 are back after I cleared them.
Here is my thought. If I’m crazy say so but be nice. The code 63 is TPS voltage too low. If I accelerate, the rpms begin to increase when the fuel from carb accelerator pump enters the cylinders. The TPS should be sending signal to ECU saying more fuel is being added but low signal from TPS will be conflicting with PIP from dizzy. Will this cause a code 18. I’m trying to figure this out without a parts cannon being fired at it. I haven’t put any new parts in it but I have swapped out some used ones with no significant changes. Dizzy got swapped as did the TPS. Changing TPS got rid of code 21 but 63 comes back with a drive so it’s signal is too low. As it’s simply a potentiometer I can understand it’s failing. Both dizzys with their own modules preform the same.
My big question now is. Will that bad TPS initiate a code 18.
I’ve checked wire condition from the dizzy looks fine. It looks like the ECM has been replaced. Says 85 Bronco II 2.8 in yellow marker across the face. When I set timing to 10 degrees BTC and plug the spout back in, the idol picks up as it should. I shine my light on timing marks and see it has advanced and moves around if I rev the engine. All looks normal. Still drives like crap. No power, occasional backfire. Pull the codes and that 18 and 63 are back after I cleared them.
Here is my thought. If I’m crazy say so but be nice. The code 63 is TPS voltage too low. If I accelerate, the rpms begin to increase when the fuel from carb accelerator pump enters the cylinders. The TPS should be sending signal to ECU saying more fuel is being added but low signal from TPS will be conflicting with PIP from dizzy. Will this cause a code 18. I’m trying to figure this out without a parts cannon being fired at it. I haven’t put any new parts in it but I have swapped out some used ones with no significant changes. Dizzy got swapped as did the TPS. Changing TPS got rid of code 21 but 63 comes back with a drive so it’s signal is too low. As it’s simply a potentiometer I can understand it’s failing. Both dizzys with their own modules preform the same.
My big question now is. Will that bad TPS initiate a code 18.