2004 Pontiac Grand Prix check gas cap

2004 PONTIAC GRAND PRIX
150,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
DOE773
  • MEMBER
  • 2 POSTS
my issue is my check engine light keeps coming on. because the check gas cap light came on i replaced the cap three times (factory caps) and it still came on i dont understand what the issue is...i am burning more gas and dont no why....please help......
Jun 18, 2010 at 3:29 PM
Advertisement
Avatar
BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
take off the purge solenoid and pressureize it. no flow should go through it. then energize and it should allow flow. if it flows both times energized or de energized its bad.
Jun 20, 2010 at 3:46 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle