1998 Ford F-150 Repair Question
Topics covered: Compression, Engine, Compression test.
Mileage: 170,000 miles.
Mileage: 170,000 miles.
Asked on September 14, 2012
Mystery engine miss
I have a 98 f150 2 wheel drive standard with a 4.6 the engine has a miss and when I put it on the scanner it comes up with a miss on cyl#4 I have replaced the fuel injector the plug the wires and the coils on the engine but it still has a miss. I have checked for vacuum leaks and found none. I am at a lose as to what else it could be. Can you help me please?
Asked by martinrobertcairnsAnswer
Replied on September 14, 2012
Check its compression to see if it varies with other cylinders.
Replied on September 15, 2012
I did a compression test and cyl #2,3,4 were 165 and the rest were 155.
Replied on September 15, 2012
Compression results seems ok.
Have you checked the EGR functions and operations?