2004 Pontiac Grand Prix check gas cap

2004 PONTIAC GRAND PRIX
150,000 MILES • 6 CYL • FWD • AUTOMATIC
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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 10:29 PM
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BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
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 10:46 PM
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