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Hard start and shuts off

Tiny
TOBY DALE STICKNEY
  • MEMBER
  • 2001 PONTIAC BONNEVILLE
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 218,000 MILES
Car starts very hard and shuts off a lot, it shuts off even driving down the road. When driving, it shuts off and cuts out, where it acts like it wants to shut off but it does not. I have changed many sensors but nothing is helping. I have no engine light on at all. Not sure what to do. Thanks for the help.
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Tuesday, February 20th, 2018 AT 5:38 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Hello,

How does the engine run while it is running? Have you replaced the crankshaft angle sensor if not this is where I would start. Here is a guide to help you see what you are in for when doing the job. Does the check engine light come on with the key in the on position?

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

This guide can help as well.

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

Please let us know what you find. We are interested to see what it is.

Cheers, Ken

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Thursday, February 22nd, 2018 AT 12:15 PM
Tiny
TOBY DALE STICKNEY
  • MEMBER
  • 4 POSTS
The engine runs good but at times it sounds rough. The engine light is on when it is on the on position and the previous owner said he replaced the crankshaft sensor.
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Thursday, February 22nd, 2018 AT 1:06 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
When the engine stalls can you hear the fuel pump running in the tank? Plus we should run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

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

Please run down this guide and report back.

Cheers, Ken
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Friday, February 23rd, 2018 AT 9:30 AM

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