Thanks for responding, When I did the tune up this summer I spent alot of money and bought 9mm ford racing wires and bostch platnum 4plus sprak plugs. I would hope that by paying more for "better quality" plugs/wires i wouldnt have this problem. And if it were any of the aspects you mentioned why would it only happen when its at or below a 1/4 tank of gas? thanks-Doug
