500SL Misfire Issue! Bad Fuel Distributor? Low Pressure? - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 08-28-2010, 10:12 PM Thread Starter
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Date registered: Jan 2009
Vehicle: 1970 280SEL, 1986 420SEL, 2002 C280
Location: Huntington Beach, CA
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500SL Misfire Issue! Bad Fuel Distributor? Low Pressure?

Hi all,
I have a 1990 500SL. New plugs, rotors, caps, intake manifold gasket, injectors, injector seals, injector cups, air distribution hoses, ALL new vacuum hoses, fuel filter, and front end cam sensor. However it is NOT firing at all on CYL number 7. I am getting spark, and I swapped the injector out with the old injector but still nothing.

So I disconnected the fuel hose to number 6 and there was a steady drip, I disconnected the hose to number 7 and it was a less steady drip almost nothing (the fuel line is clean)... Does that mean I have a bad fuel distributor?? I have read that if you have low fuel pressure or a failing fuel pump it will not put out any pressure on the second from the last cyl, is that true? I am ready to buy a rebuilt fuel distributor but a fuel pump is WAY cheaper. I havent had much luck on here in the past with getting any answers at all so I hope someone responds. In advance, I appreciate your time and dedication to a fantastic automobile and I really appreciate any answers I could get.

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