Cars an 88 so no Mass Air. "YET". Throttle body is brand new so it can t be dirty. However i still have stock injectors. I dont wanna buy a set of new 19 lbrs though, i was hoping to just convert to mass air and get new 24 lbrs with that. Hopefully they will hang in there a while more. Could be the spark to. I just bought new spark plugs like 3 days ago, but the dizzy is original stuff to, as well as the coil.