what else can i try????????

2003 CHEVROLET TRUCK
113,000 MILES
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BIGJIM1467
  • MEMBER
  • 1 POST
a p0300 engine code is coming on. i have replaced the intake gaskets, fuel pres regulator, fuel filter, gas cap, plugs and wires, cleaned mass air flow sensor, and ran 2 cans of BG44k fuel system cleaner through it. any help?
Feb 7, 2012 at 1:03 AM
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BMRFIXIT
  • ✓ASE Certified Mechanic
  • 19,053 POSTS
  • ASE Certified Mechanic
possible bad injectors
check catalytic converter s
Feb 7, 2012 at 2:15 AM
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