by monzabug350 » Mon Jun 15, 2015 11:59 am
Did you build the eng or did a shop/pro? If a shop talk to them about your problem and see what they say.Or if you did it yourself,how long have the plugs been in the eng? What do they look like when you pull them,sooty,wet,black,tan,gray,white,etc? How often do you drive the car and how far? And do you now and then "blow the carbon out"? I would not use race plugs they are usually too cold for a street eng. Have you tried stepping down a jet size or two to see if that helps? What brand/grade of gas do you run? Any additive and octane booster? Do you buy you gas from the same place or when you see the gauge on E? If the car sits up for an extended time do you put a fuel stableizer (?) in the tank? (Bad gas will give you fits) Just some thoughts.