Question about 2000 GMC Sierra
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.
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
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.
Posted on Mar 02, 2010
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