MYSTERY ENGINE MISS

1998 Ford F-150

Tiny

martinrobertcairns

September, 14, 2012 AT 11:58 AM

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?

FOUND 2889 RELATED QUESTIONS

Engine Miss

52 ANSWERS
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3 Answers

Tiny

KHLow2008

September, 14, 2012 AT 11:59 AM

Check its compression to see if it varies with other cylinders.

Tiny

martinrobertcairns

September, 15, 2012 AT 12:24 PM

I did a compression test and cyl #2, 3, 4 were 165 and the rest were 155.

Tiny

KHLow2008

September, 15, 2012 AT 6:24 PM

Compression results seems ok.

Have you checked the EGR functions and operations?

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