Date registered: Apr 2009
Vehicle: 1972 Mercedes Benz 280 SEL
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1972 280 SEL 4.5 fuel pump problem?
I took my 1972 280 SEL 4.5 out for a spin on the Interstate today and stopped by my office on the way home. When I returned to the car, it wouldn't start. I cranked and cranked and finally decided to put the gas pedal all the way down. It started, but ran pretty rough. On the way home, it stalled when I would stop. I made it home and drove the car into the garage, keeping my foot on the gas so it wouldn't stall. It blew out bluish smoke at idle and finally stalled. When I got out, I noticed a sound coming from just behind the left rear tire. I looked under the car, and the buzzing/humming sound was coming from the fuel pump.
Does the fuel pump run after the car is turned off? Could the fuel pump be failing and creating a fuel pressure problem? A mechanic told me the last time that the car was running way too rich. Also there was a paint-like smell coming from fuel pump area.
Help is appreciated.