bigfootchiro
Full Access Member
Alright guys, here we go! Limped the Hoe from Palm Springs to Largo. Made it 130 miles, and this happened. Couple things to note... it would have a very difficult time locking up the torque converter, so transmission temps would go up to around 210 at times. If TC did lock up, it would misfire and stutter/shake like crazy, Cylinder 3 misfires would go through the roof, and TC would unlock for a while. Truck would literally only misfire when TC would lockup, but knock was there the entire time.
Makes it hard to believe that a rod bearing is bad. I’ve pinpointed knocks and misfires to Cylinders 3 and 8. Cylinder 8 happens at idle once throttle has been touched but once it starts it’s always there. If truck sits at idle after start up, it won’t misfire til the throttle is touched, and Cylinder 8 starts to misfire once idle is reached again. Cylinder 3 misfires mostly when TC is locked up.
Without tearing into the bottom side of the motor yet, what electrical issue could cause this? Bad ground, knock sensor, etc? I replaced the PCM and that did nothing.
Makes it hard to believe that a rod bearing is bad. I’ve pinpointed knocks and misfires to Cylinders 3 and 8. Cylinder 8 happens at idle once throttle has been touched but once it starts it’s always there. If truck sits at idle after start up, it won’t misfire til the throttle is touched, and Cylinder 8 starts to misfire once idle is reached again. Cylinder 3 misfires mostly when TC is locked up.
Without tearing into the bottom side of the motor yet, what electrical issue could cause this? Bad ground, knock sensor, etc? I replaced the PCM and that did nothing.