Two things.
1) you may have a fuel system leak down, this causes the fuel mixture to be off.
2) leaking oil into the cylinders via the valve guides
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Benzmac:
Donnie Drummonds
1991 GMC Syclone
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
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