Compression
Asked by GuruVTYSH Aug 11, 2018 at 08:03 PM about the 2001 Ford F-150 XLT Extended Cab 4WD LB
Question type: Maintenance & Repair
Number one cylinder 190 lb
number 2 cylinder 185 lb number
3 cylinder 185 lb number 4
cylinder 125 lb number 5 cylinder
135lb number 6 cylinder 165 lb
number 7 cylinder 80 lb number 8
cylinder 100 lb
2 Answers
Burned valves or worn rings. Probably a high mile, tired engine.
Don't know, I would guess this is more of a neglected motor rather than one with high mileage. Those readings are pretty bad. My truck with a 4.6 jumped timing and wrecked hell on the drivers side of motor(because only one cam jumped timing) . I have heard of plastic pieces breaking off timing chain guides and plugging oil passages, don't know if this actually happens often, I know timing chain guide failure is not rare though on these. I would be sure compression test was done correctly and that tester is working properly.
