Fifth cylinder misfired…
 

I have a problem with 1999 S80T6.

The code is “Fifth cylinder misfired”. Dealer said that a compression in fifth cylinder is low. They charge $1000.00 to remove the head and $1000.00 to put it back, plus ~3000.00 for repair.

What should I do in this situation?

Thanks a lot!

RE: Fifth cylinder misfired…
 

Did they give you the compression numbers?
If so post them so I can look at them.
Are you sure it is not a bad coil?

RE: Fifth cylinder misfired…
 

The coil has been changed. The pressure in the 5th cylinder is 50. All others are around 170-175.

Thanks,

RE: Fifth cylinder misfired…
 

Did they do a wet compression test after the first one?
That will tell you it if is the rings.
Did they do a cylinder leak down test?
That will tell you if it was the valves.

RE: Fifth cylinder misfired…
 

They didn't do anything.

RE: Fifth cylinder misfired…
 

Have someone perform the wet down test and the leakdown test and take it from there.That will tell you what you need to do.