I have been away from the web forums for 5 years now and came back because I am having a emissions problem with my '84 500SE. Being a Gray market import, I know this car will not run as a LEV or close to it but enough to atleast not smell like a spent refinery when going down the road and getting less than 10mpg. I have done the basic maintenance and chain was done years ago. I have also had the top ends emissions cleanout service.. Where else do I look? EGR valves on the manifold? Coolant temp sensor?

Any help would be great.

Cheers.

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