Vehicle stalling code P0300

2001 OLDSMOBILE BRAVADA
110,000 MILES • 6 CYL • 4WD • AUTOMATIC
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GAIL1954
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  • 3 POSTS
Vehicle stalls/shuts off when coming to a stop. Code is P0300 has back fired once.
Mar 2, 2018 at 5:31 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
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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
Mar 2, 2018 at 5:54 PM
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RYAN L
  • CAR REPAIR CONTRIBUTOR
  • 269 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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Mar 3, 2018 at 1:11 PM
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GAIL1954
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  • 3 POSTS
The check engine light is now flashing on and off. It is not staying on just flashing on then off.
Mar 3, 2018 at 4:22 PM
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ASEMASTER6371
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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
Mar 3, 2018 at 4:38 PM
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GAIL1954
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Just got it from a used car lot.
Mar 3, 2018 at 8:56 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
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I would start by checking the plugs and all filters. it could be basic ignition issues such as plugs, wires, cap and rotor.

Roy
Mar 4, 2018 at 4:36 AM
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