Bad misfire

2006 PONTIAC GRAND PRIX
175,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
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NINAGUERRA23
  • MEMBER
  • 1 POST
Have changed the EGR valve and plugs and wires. Still having the same problem. Codes were read and it came back for a mass air flow sensor? Would a bad MAF cause an engine misfire? Please help!!
Nov 18, 2019 at 5:06 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
Yes. The MAF can cause issues with misfires because this is what the PCM uses to determine how much air is entering the engine in order to match the proper amount of fuel to achieve proper air/fuel mixture.

If you provide me the actual code, I can give you the testing for the code. Thanks
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Nov 19, 2019 at 4:30 PM
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