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moise salazar
moise salazar Posted on Oct 30, 2012
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Po161-po300 put new spark plugs ac champions came pregup to 40in original plug is 60in

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Ricky Peters

Ricky Peters

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  • GMC Master 2,620 Answers
  • Posted on Oct 30, 2012
Ricky Peters
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Sparkplug gap should be .040.The trouble code P0161 is for a faulty oxygen sensor on the passenger side after the catalytic converter.The P0300 is a multiple misfire.It could be vacuum leaking around the intake manifold.

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motor1258

Mike Butler

  • 6674 Answers
  • Posted on Mar 02, 2010

SOURCE: GMC SAFARI 2001 4WD. RANDOM MISFIRE DETECTED

2 things come to mind, confirm you have proper fuel pressure, and if you've got a MAF (mass air flow sensor)
in the intake hose to throttle body, remove it, and spray it clean with Tuner spray cleaner, or electrical spray cleaner from radio shack or similar store, and then try it. Not uncommon for the MAF sensor to dirty and cause what your experiencing. If that doesn't cure it, start checking EGR and EVAP system.

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tammy_brown2

Tammy-Lyn Brown

  • 37 Answers
  • Posted on Mar 25, 2012

SOURCE: 2003 envoy stalls what is wrong

Bad coil pack possibly, if all spark plugs were replaced.

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All details here:

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Premium Class:
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