it's very possible that the piston is stuck in the fuel distributor,especially if been sitting for a while.pull a plug and see if black and fouled.sounds like car getting way too much fuel.

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David S Poole
European Performance
Dallas, TX
4696880422

"Fortune favors the prepared mind"
1987 Mercedes Benz 420SEL
1988 Mercedes Benz 300TE (With new evaporator)
2000 Mercedes Benz C280
http://www.w108.org/gallery/albums/A...1159.thumb.jpg