My brother has a problem with his Indy 400 he finally got it running but it was putting out white smoke really bad. So he took out the plugs and they were fouled. the owner b4 him said it fouled plugs if choke was on. the spots on the carbs where the coke goes in the screw are all the way out so the slides don't touch the bottem. i was thinking it was suppose to do that. could that be the problem or is it something elce. any help would be nice.