Code PO300, misfiring

Tiny
EUGENE HAMELIN HOLEINONEAMMO
  • MEMBER
  • 2007 JEEP WRANGLER
  • 3.8L
  • V6
  • 4WD
  • MANUAL
  • 204,000 MILES
My motor misfires on 2 - 4 - 6, on a live test.
Sunday, June 26th, 2022 AT 7:12 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

There are a number of reasons why you would get the P0300 code.
It could be due to worn spark plugs, bad coil, also could be for having improper fuel pressure, faulty injectors. It can even be due to a faulty PCM.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

I have attached the troubleshooting guide for the code P0300 below for your reference.
It covers the usual diagnostics procedure.

Let me know of any questions.
Thank you.
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Sunday, June 26th, 2022 AT 8:23 AM

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