Quote:
Originally Posted by smittykid
I was just talking to a fellow that has a 29 Speedster for sale. He says after about 100 miles the 1st and fourth spark plugs foul. Two and three are OK. It's carbon fouling-not oil. He's running a MIller High Speed high compression head and a Stromberg 81 carb with an electronic ignition. He can't figure out why it is just the first and fourth plugs that foul. Any thoughts or is there anything else I should be asking? Thanks
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He might have a vacuum leak on the intake causing 1and 4 to run lean. Then he might have put larger jets in to get it to run on all 4. We would need to know all the things he has done to it, to know where to look.