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Losing fuel pressure

Tiny
DAMAEMMA
  • MEMBER
  • 1998 BUICK REGAL
Engine Mechanical problem 6 cyl Front Wheel Drive Automatic 80000 miles

98 buick regal 3800 super charge, replaced the fuel pump, fuel filter and pressure regulator. Car starts and immediatly loses fuel pressure then it stalls out and when the engine stops the fuel pressure goes back up.
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Friday, April 9th, 2010 AT 9:03 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
The only things that can cause is a weak full pump or clogged fuel line. Did you use an AC Delco pump?

Please remove the fuel line up at the fuel rail and check the volume which is the issue.

Please let us know what happens.

Cheers
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Wednesday, April 14th, 2010 AT 8:57 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,647 POSTS
Thanks for the tip, I removed the line at the rail and the volume was super low so I did some checking and found a smashed spot in the fuel line like something in the road hit it so it took some doing but I replaced the fuel line and the car works great again. Thanks again I love this site.
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Monday, April 2nd, 2018 AT 11:51 AM

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