Pontiac Running Lean

2007 PONTIAC G5
109,000 MILES • 4 CYL • FWD • MANUAL
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KAYSCARS
  • MEMBER
  • 7 POSTS
Why would my stock '07 Pontiac G5 Gt be running lean?
Dec 15, 2010 at 2:43 PM
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LEGITIMATE007
  • ✓ASE Certified Mechanic
  • 5,121 POSTS
  • ASE Certified Mechanic
is there a check engine light on? there could be several reasons, a bad oxygen sensor, coolant temp. sensor. a loose gas cap(should be clicked several times past the tightened feel). egr valve. vacuum leak. a computer scan should have given you a pretty good idea, do you have the scan code(s) so I can look them up?
Dec 15, 2010 at 2:52 PM
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