Ecomike
NAXJA# 2091
- Location
- MilkyWay Galaxy
Installed a good used knock sensor on my 87 Wagoneer and it ran fine till I hit about 48 mph during mild acceleration and then the front end starting vibrating and shaking so bad at 48 mph it almost started affecting the steering.
The engine must have been retarded on the timing too much by the Renix ECU based on knock sensor and knock sensor wiring data (290,000 mile engine) as the front end is solid (not very old parts), and it goes away at cruise up to 60 mph (have not taken it any higher yet), it is worst at 48 mph during mild to aggressive acceleration.
Going to disconnect the sensor to confirm it is the cause. I have put about 70,000 miles on this beast in 12-13 years since I bought with out a knock sensor and with ever feeling this problem. I had death wobble on this jeep 4 years agao and replaced the entire front end suspension, and death wobble was bad even at 20-30 mph, not at exactly 48 mph like this new issue.
Any one ever run into this before. While it could be something else, I doubt it is anything else. Timing too close....
Cruiser54, we need discuss the distributor timing (replaced it about 12 years ago with one from Autozone), but It has always been a bit weak on power which I always assumed was low compression (130 psi average) and 2 bad valve guides, but we also need to discuss possible knock sensor wiring damage, and possible bad sensor issues here this week as to what could cause the violent shakes
The engine must have been retarded on the timing too much by the Renix ECU based on knock sensor and knock sensor wiring data (290,000 mile engine) as the front end is solid (not very old parts), and it goes away at cruise up to 60 mph (have not taken it any higher yet), it is worst at 48 mph during mild to aggressive acceleration.
Going to disconnect the sensor to confirm it is the cause. I have put about 70,000 miles on this beast in 12-13 years since I bought with out a knock sensor and with ever feeling this problem. I had death wobble on this jeep 4 years agao and replaced the entire front end suspension, and death wobble was bad even at 20-30 mph, not at exactly 48 mph like this new issue.
Any one ever run into this before. While it could be something else, I doubt it is anything else. Timing too close....
Cruiser54, we need discuss the distributor timing (replaced it about 12 years ago with one from Autozone), but It has always been a bit weak on power which I always assumed was low compression (130 psi average) and 2 bad valve guides, but we also need to discuss possible knock sensor wiring damage, and possible bad sensor issues here this week as to what could cause the violent shakes