Help! I've replaced all 3 coil packs, plugs, wires, fuel filter, catalytic converter & the main computer. I'm still getting codes QDM 1 QDM 4 failure. Also service traction control light is on and can't find any info about what to do about that. I'm over 600.00 in parts & labor and about to drive this thing off a cliff...anyone with a straight answer that is a specialist on 1994 chevy lumina apv!!!
Oct 24, 2008 at 3:14 PM