Code po300

2001 CHEVROLET BLAZER

225,000 MILES • 4.3L • 6 CYL • 4WD • AUTOMATIC

SCOTT GOODIS

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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?

Jun 25, 2022 at 5:44 AM

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SQM

AUTOMOTIVE REPAIR CONTRIBUTOR
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.

Images (Click to enlarge)

Jun 25, 2022 at 8:54 AM