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Old 11-10-2005, 07:29 PM
alienman alienman is offline
'90 300se, '95 c280
Join Date: Oct 2005
Location: Honolulu, Hawaii
Posts: 112
Indeed. I've already done a lot of searching on these forums, as I had mentioned. I couldn't find anything regarding determining whether what I am experiencing is fuel fouling, oil fouling, or a combination of both. The exhaust smells rich, even with a fresh plug installed.

I already found via prior searching that on the m103, it is usually the valve seals that go bad. They were changed by the previous owner around 5000 miles ago, so that probably leaves the valve guides, as compression is good. New cap/rotor/wires have been installed with the same results. I have not checked for a leaking injector or bad fuel distributor yet.
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