Its kind of hard to explain what its doing, its a 84 chevy 350 four speed. Its summer time here so its warm in the morning, when i take off down the road it cuts out until over 2,000 rpm and its warmed up. once its been runnin, and gets up to speed the miss it shakes the truck and each miss is liek a popping sound, but the werid part is it still seems to run fine, just that slight miss. any ideas?