Quote:
Originally Posted by 82gray380
The P.O. stated he did a tuneup on it, but I think he ment 7 years ago, so I changed the plugs and found they were very old looking and one plug looked like it wasn't firing at all. So I did a compression check. It read 60 at idle and did increase with exceleration up to about 110/120. I figured either the valves are carboned up or the rings are gummed up from sitting so long (at least that's what I'm hoping).
thanks
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How does one do a compression check at idle and then during acceleration. All the compression checks I do are engine not running with plugs out. My 560SL compression is about 160 - 165 PSI.
John Roncallo