# 2004 grand prix stalling

**URL:** <https://community.cartalk.com/t/2004-grand-prix-stalling/102930>\
**Category:** Maintenance/Repairs\
**Tags:** pontiac, grandprix\
**Created:** [April 13, 2017, 8:33am UTC](https://community.cartalk.com/t/2004-grand-prix-stalling/102930 "2017-04-13T08:33:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![icecajun](https://avatars.discourse-cdn.com/v4/letter/i/ee59a6/32.png) [@icecajun](https://community.cartalk.com/u/icecajun)\
**Post date:** [April 13, 2017, 8:33am UTC](https://community.cartalk.com/t/2004-grand-prix-stalling/102930/1 "2017-04-13T08:33:51Z")

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I have a 2004 grand prix 3.8 engine that keeps stalling. I notice it happens mostly when speed up and go up hill. I changed the crankshaft sensor and cleaned the throttle body. But didn’t help. There’s no check engine light on. Any ideas on what it can be? Thanks.

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**Author:** ![icecajun](https://avatars.discourse-cdn.com/v4/letter/i/ee59a6/32.png) [@icecajun](https://community.cartalk.com/u/icecajun)\
**Post date:** [April 13, 2017, 8:36am UTC](https://community.cartalk.com/t/2004-grand-prix-stalling/102930/2 "2017-04-13T08:36:43Z")

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Also did a fuel pressure test and it was fine.

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**Author:** ![pete\_peters](https://avatars.discourse-cdn.com/v4/letter/p/46a35a/32.png) [@pete\_peters](https://community.cartalk.com/u/pete_peters)\
**Post date:** [April 13, 2017, 12:56pm UTC](https://community.cartalk.com/t/2004-grand-prix-stalling/102930/3 "2017-04-13T12:56:09Z")

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Good fuel pressure does not necessarily equal good flow. What’s the fuel pressure when the problem’s occurring? Check for plugged cat. My specs say “less than 1 psi @ 2000 RPM in park”.