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I think I got it! Amazing! I have enclosed a photo showing how much I moved the pump toward the engine - advancing the timing. Some black smoke initially on start-up, but it went away pretty quickly. Took it for a drive and it clearly runs better - NO PINGING/KNOCKING!
Would new nozzles cause the timing to change? That's the only thing I've really changed as far as the fuel system goes... I couldn't move the pump anymore AWAY from the engine - don't know what that means, if anything...
According to the picture - blue mark on right (pump side), and red on left (engine side), is this a big adjustment?
ryan
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RG Newell
1984 300D
1972 250
1986 560SL
1991 300CE
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