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Stumbing / Low compression reading 850 1996

uid 14317's pic
posted by  Most Unusual on  Sat Apr 14 11:57 CST 2012
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last visit: Tue Jan 7 20:53 CST 2014
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I purchased a 1996 850 Turbo with about 212K miles in Oct 2011 (odometer has been broken for years). The engine runs great and pulls very strong. Recently, the engine began to "die" for a split second (blink of an eye) while driving, like the ignition or fuel was cut-off and then all was good again. Now while idling at a light, periodically, the engine may stumble a bit, pick up rpm's and then level out, then drop, then level out. It is not like the engine is mis-firing, just trying to shut down. Once I get going, the engine is fine, except for a slight stumble. I am also getting an occasional P0103 (MAF) code. I replaced the MAF 4 months ago. The car does not smoke while idling or cruising, but when coming off boost, there is about 2 seconds of gray/black smoke. I have already performed all the routine maintenance items, plugs, cap, rotor, wires, air filter, oil & filter, etc. I do not have excessive crank pressure. All vac lines are good, induction pipes have no holes/leaks, wiring and connectors appear to be in good condition. Compression is: 115/110/130/132/130. This seems low to me. I did add oil to the low cyl's and the numbers went up about 10 psi. In-tank pump is working, but I have not checked fuel pressure or the regulator yet. No gasoline leaks or smell anywhere. Help! I love this car! Classic red, looks great and fun to drive. Lost on this one...any help would be appreciated. Not sure if my pic uploaded.
https://www.facebook.com/photo.php?fbid=3052425422159&set=o.286104214215&type=1&







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