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Code PO300

Tiny
SCOTT GOODIS
  • MEMBER
  • 2001 CHEVROLET BLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 225,000 MILES
I have an engine code of po300 which is a random misfire and cannot find what is causing the misfire. I have changed the plugs, wires, cap, rotor and coil. What could it be that I'm not seeing?
Saturday, June 25th, 2022 AT 5:44 AM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The P0300 can also get triggered due to faulty injectors among other things.

Take a look at this helpful guide:

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

I have attached the troubleshooting guide for the code P0300 below.
Follow those steps as it can help you determine the issue.

Let me know of any questions.
Thank you.
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Saturday, June 25th, 2022 AT 8:54 AM

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