2001 Chevy Blazer FUEL SYSTEM

2001 CHEVROLET BLAZER
103,800 MILES • 6 CYL • 4WD • AUTOMATIC
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XAVIER33
  • MEMBER
  • 1 POST
my truck sometimes takes along time to start and when i am driving and step on the gas it hesitate i have three codes come up p300-radom misfire,171-bank one to lean and 174-bank two too lean.
Jan 25, 2008 at 8:16 AM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs!
Jan 25, 2008 at 2:35 PM
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