Shuts off while driving

2005 PONTIAC GRAND PRIX
281,000 MILES • 3.8L • V6 • AUTOMATIC
Avatar
DOROTHY68
  • MEMBER
  • 1 POST
Have the car listed above series 3 that shuts off while driving down the road. Put it in neutral and it starts right back up . Changed MAF sensor , fuel pump , crankshaft position sensor and it's still doing it . Only codes are for knock sensor ,oxygen sensor bank 1 and a heater sensor thing . Please help
Apr 28, 2021 at 11:02 AM
Advertisement
Avatar
KASEKENNY
  • ✓Experienced Mechanic
  • 18,907 POSTS
This does sound like a fuel issue so let's start with putting a fuel pressure gauge on the engine and then tape it to the windshield so that you can watch it when this acts up.

https://www.2carpros.com/articles/engine-stalls

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

Assuming that the pressure doesn't drop then we need to check the battery and cables. A cable issue or ground issue will cause the engine to just cut off as well.

https://www.2carpros.com/articles/car-battery-load-test

https://www.2carpros.com/articles/everything-goes-dead-when-engine-is-cranked

Please let us know what happens with this info and we can go from there. Thanks
Apr 29, 2021 at 12:55 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.