View Single Post
  #2  
Old 12-28-2007, 12:44 PM
Roncallo Roncallo is offline
88Black560SL
 
Join Date: Oct 2004
Location: CT
Posts: 3,510
Quote:
Originally Posted by 82gray380 View Post
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
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
Reply With Quote