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P0300 intermittent misfire

Tiny
JONATHON BURCHARD
  • MEMBER
  • 1998 NISSAN QUEST
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 77,500 MILES
Intermittent misfire will not go away. Replaced plugs, wires, cap/button, cleaned MAF sensor. This all started when, I think wife bought bad fuel. Any idea what to do next? I forgot that the engine light blinks when you drive above 35 mph. Then it goes away. It also starts to blink as I accelerate from 45-65 mph, I cannot hear any air leaks at the moment, and at idle, it is pretty rough.
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Friday, October 19th, 2018 AT 6:45 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

Sorry for the delay. It sounds like you have a bad injector or you need to replace the MAF sensor because cleaning it does not always work.

Can you tell me if you used OEM ignition parts? If you have aftermarket spark plugs the engine may not run right.

Let's do a compression test to make sure there are no low cylinders.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run down this guide and report back.

Cheers, Ken
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Friday, November 2nd, 2018 AT 11:25 AM

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