Misfire in cylinder 1, 4, 7 and random
By burn1326
I'm going to try and be direct here, but this has stumped so many. I have a 2011 1500 V8 5.7L Outdoorsman. The truck had about 135k when a misfire in cylinder 1 was detected. I replaced all plugs with iridium autolites. Misfire continued, and I diagnosed a lifter failure in cylinder 1 causing damage to the cam shaft. I replaced the Cam, all lifters, all MDS solenoids, vvt solenoid, phaser, one coil pack on cylinder 1, cam position sensor, the throttle body for the position sensor, and the... Read more