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Vehicle stalling code P0300

Tiny
GAIL1954
  • MEMBER
  • 2001 OLDSMOBILE BRAVADA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 110,000 MILES
Vehicle stalls/shuts off when coming to a stop. Code is P0300 has back fired once.
Friday, March 2nd, 2018 AT 5:31 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

I would check the fuel pressure. You may have a bad fuel pump.

Also, you may be losing spark as well.

Check the fuel pressure first. There is an access port on the fuel rail back by the distributor. You can rent a tester at a parts store if you do not have one.

Roy
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Friday, March 2nd, 2018 AT 5:54 PM
Tiny
RYAN L
  • ADMIN
  • 256 POSTS
Hello GAIL1954,

Here is a link to an informative article with step by step written instructions and pictures on how to test fuel pressure:

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

If you need any further help please come back to this post. We are always happy to help.

Thank you for visiting 2CarPros.

Kindest regards,

Ryan
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Saturday, March 3rd, 2018 AT 1:11 PM
Tiny
GAIL1954
  • MEMBER
  • 3 POSTS
The check engine light is now flashing on and off. It is not staying on just flashing on then off.
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Saturday, March 3rd, 2018 AT 4:22 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
That indicates a misfire in one or more cylinders. It could be plugs, wires, cap or rotor.

How long since a good tune up?

Roy
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Saturday, March 3rd, 2018 AT 4:38 PM
Tiny
GAIL1954
  • MEMBER
  • 3 POSTS
Just got it from a used car lot.
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Saturday, March 3rd, 2018 AT 8:56 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I would start by checking the plugs and all filters. It could be basic ignition issues such as plugs, wires, cap and rotor.

Roy
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Sunday, March 4th, 2018 AT 4:36 AM

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