Mblifer

Can anyone advise me as to why my mb may be running rich? Here are the details.

Purchased this car 1 week ago with a "lean" condition. Bought it from a MB mechanic. He said that it could be the fuel metering piston in the TB. I got it home and looked for blown fuses, found one ontop of a relay. and changed it. The car responded with more power. Could be a coincidence as I have no idea what that fuse was for.

One week later I have a car that is running rich. I take it out on highway and "blow it out" No smoke after punching it but when i return to city driving I get a huge ploom of sooty hydrocarbons out the tail pipe.

This car makes a few odd noises one of which I believe is linked to the fuel system. Ther is an intermittant whirring noise coming from the trunk. I believe this maybe the fuelpump.

The car was a shop car but sat since aug of this year, oil clean, clean air filter, clean pcv filter , I boldly assume the fuel filter i new also. The car runs awesome and no engine noise except for a noisy lifter on passenger side bank.

I ran marvel through the first tank as an attemt to clean it out. My question is;

Is this potentially a fuel system problem or a result of a car that needs to go out for a long highway ride to clean it out?

suggestions?

thanks

alabbasi

Lots of issues could cause a car to run rich that you can diagnose using a fuel pressure gauge. You can adjust the mixture by using a 3mm hex key. The mixture screw is located on the air flow meter beneath the tower.

Google Bosch K-Jetronic testing.