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P0300 trouble code

Tiny
FARMERJACK
  • MEMBER
  • 2002 BUICK LESABRE
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I have a p0300 trouble code with flashing check engine light and engine misfiring badly.
Thursday, October 24th, 2019 AT 8:34 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I would start by performing a compression test to make sure there is no internal damage to the motor.

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

How old are the tune-up parts?

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

I would also check the fuel pressure as well to be sure the proper amount of fuel is being sent to the engine.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Roy
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Thursday, October 24th, 2019 AT 8:54 AM
Tiny
FARMERJACK
  • MEMBER
  • 1 POST
I replaced the ignition control module and that fixed the P0300 trouble code and misfire. Thank you.
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Monday, October 28th, 2019 AT 12:11 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,332 POSTS
ASEMASTER6371 is one of our best! Use 2CarPros anytime, we are here to help. Please tell a friend.
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Monday, October 28th, 2019 AT 12:11 PM

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