Code po300

2001 CHEVROLET BLAZER

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

SCOTT GOODIS

MEMBER
1 POST

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 24, 2022 at 10:44 PM

SQM

✓Experienced 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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