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Engine shuts off during start up when warm

Tiny
BUICKREGAL
  • MEMBER
  • 2003 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 114,000 MILES
It can be zero degrees outside and it starts right up, but when warm or after running for ten minutes, when I try to restart it, it takes four times. It shuts off immediately after starting and I smell rotten egg fuel. I replaced the air sensor at $350.00. Repair shops say nothing is wrong. Nothing shows up on the test. It keeps getting worse. Thank you for your help.
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Sunday, January 20th, 2008 AT 4:14 PM

2 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
Replace your fuel pressure regulator. The diaphragm inside is slightly ruptured causing raw fuel to leak into the vacuum line connected to it. Remember to give feedback and votes if I helped you. Thanks
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Sunday, January 20th, 2008 AT 5:04 PM
Tiny
PATRICK FLOHE
  • MEMBER
  • 20 POSTS
I agree.
Fuel pressure regulator sounds like the most-likely culprit.
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Saturday, September 8th, 2018 AT 3:03 AM

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