BenzWorld Senior Member
Date registered: May 2007
Vehicle: 64' 220SEc, 72' 300SEL 6.3, lots of parts
Location: San Diego/Spring Valley
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More than likely ignition is the problem, a leaky exh. will just sound bad especially is there is a spark miss. (pfoof phoof, type sounds)
Clean, scrape the dry black crud on the rotor and cap terminals to shiny brass. remove the spark plug caps, cut off 1/4 " poke an awl into the wire to open it up, screw it back into the spark plug cap and test pull. this is what I call the cheap tune up. and may smooth things out.