1980 Mercedes Benz 450SL Base 8 Cyl 4.5L
My Benz has been backfiring black smoke every 6 months or so and is running rough. Does anyone have any idea why?
This is actually a 1973 450sl Mercedes not a 1980 .
Spoon Sports 10/3/2011
Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor.