2004 Pontiac Grand Prix GTP Q&A

2004 Pontiac Grand Prix GTP Question: hard miss

when cranking my car it has a really bad miss. the code reads random/multiple cylinder misfire. I just replaced the plugs and wires. I also tested the coil packs to check the firing and all produced a big blue spark like they should. what is causing this to occur? -
Answer 1
Did this start after you installed the plugs and wires? If so there may be a bad spark plug or you may have crossed the wires. Recheck your work. -