Car stored for 6 years. Ran great before. Changed oil, plugs and wires, air, fuel, and oil filters. Computer passes, no codes. Checked all vacuums. Still misses.
Pontiac Q&AAsk Your Question
2000 Pontiac Grand Prix Question: Car miss. Computer pass, no code. Changed plugs, wires, fuel filter. High idle.
Answer #1goodguy February 25, 2014, 23:10Master
I would start by checking the coils for spark ...just pull the plug wires off one at a time to find out which cyl is missing...what kind of scanner did you use to check for codes if it is just a code reader that wont help much ...you need to use an OBDII scanner so you can get a data stream !
Answer #2Greg's Orange Auto (13199 Answers) , Orange, CA - (714) 361-9386globalhelper February 26, 2014, 05:45Master
poss bad fuel?