2001 Chevy Astro cylinder 6 misfire code

2001 CHEVROLET ASTRO
110,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BLAZEONE
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new distributor ,wires,plugs, runs fine but keeps setting code for misfire
Feb 12, 2009 at 7:16 AM
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JDL
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  • ASE Certified Mechanic
What was the code? A P0300 is a random missfire, it may be a problem that is common to all cylinders. If the codes is cylinder specific, that's where you start looking. A misfire can be caused by fuel--spark--compression, just about anything.
Feb 12, 2009 at 7:32 AM
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BLAZEONE
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p 300 and 101 mafs
Feb 12, 2009 at 8:02 AM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Can you check the circuits at the maf sensor? Pink wire is voltage with the key on, black wire is ground, yellow wire is signal, the signal should change with air flow. You could try the tap test, see if the signal changes.
Feb 12, 2009 at 9:39 AM
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