BenzWorld Junior Member
Date registered: Apr 2010
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Help- 1970 280S no power, runs rough.
Purchased a 1970 280S dual zenith carbs. Car idles rough and on acceleration very jerky, missfires, no power, crackling noise from exhaust. No smoke from tailpipe, but plugs dry and black. I started with the ignition and changed coil, plugs, condensor, distributor cap, rotor then fuel filter and pump. Still same problem. Tried to advance and retard timing with no change. With air filter off the second carb has a hissing sound in it. I am not sure if it is the carb but that is the last thing I want to mess with. Any thoughts as to where I go next.