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Fifth cylinder misfired…

  #1  
Old 05-06-2005, 02:49 PM
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Default 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!
 
  #2  
Old 05-06-2005, 08:54 PM
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Default 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?
 
  #3  
Old 05-07-2005, 12:56 PM
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Default RE: Fifth cylinder misfired…

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

Thanks,
 
  #4  
Old 05-08-2005, 02:35 AM
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Default 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.
 
  #5  
Old 05-09-2005, 02:38 PM
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Default RE: Fifth cylinder misfired…

They didn't do anything.
 
  #6  
Old 05-09-2005, 03:08 PM
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Default 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.
 
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