Car sat for four years. Now it doesn't have spark. Found mouse nest up by ecm, replaced ecm, checked all wires to make sure there wasn't anything wrong, control module, computer on drivers side
of dash board. Found mouse nest up by ecm, key tumbler, plate were the coil packs sit on. Could it be a ground wire someplace? Need help asap! Email address is marvedearborn1@gmail.com. Thank you.
What makes this problem better or worse?
Nothing
How long has your 2004 Pontiac Grand Prix had this problem?
RepairPal Certified shops can diagnose and repair your 2004 Pontiac Grand Prix. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your Grand Prix.
After sitting for four years, issues like no spark could be caused by damaged wiring, especially if rodents have been around. A missing or poor ground connection can absolutely prevent ignition. Double-check all grounds, particularly those near the ECM, ignition module, and coil packs. Since you've already replaced the ECM and checked wires, the next step could be inspecting the crankshaft position sensor, as it's a common cause of a no-spark condition in these cars. Also, ensure the ignition control module is functioning correctly.
If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!
