2004 Pontiac Grand Am

2004 PONTIAC GRAND AM
140,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
FATANASOVIC
  • MEMBER
  • 1 POST
2004 grand am gt 3.4l car wont start cold, well it is 20 deg celcius and the car wont start unless the block heater is plugged in and the coolant reaches 90 deg ferenheight then it fires up and runs fine. i have changed both crank sensors, cam sensor, ignition module, coolant temp sensor. car had me stumbled for weeks now. when coolant reaches 80 deg. ferenheight or lower, the car will not start unless i plug in the block heater to warm up the coolant. fuel pressure test came back ok, and spark does not seem to be the issue.

thank you hope to hear from you soon
Sep 23, 2009 at 1:33 PM
Advertisement
Avatar
MMPRINCE4000
  • CAR REPAIR CONTRIBUTOR
  • 8,548 POSTS
Check the cold start valve circuit. It adds additional fuel to engine in cold weather, sort of like a choke on a carb.

After cranking for a few seconds, remove plugs and check for gas fouling or dry plugs.
Jul 30, 2020 at 5:01 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.