chevy truck fuel system

2001 CHEVROLET SILVERADO
100,000 MILES • V8 • 4WD • AUTOMATIC
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WADEWYNN
  • MEMBER
  • 2 POSTS
i replaced the fuel pump on my chevy truck now the pump runs continously. you can hear the fuel regulator bypassing fuel back to the tank and fuel pressure is 58psi with the key on. when the key is off the system holds around 50psi

the engine fires as soon as it turns over but acts like it stops firing instantly

the fuel pump should only run for 2 seconds then stop. what pulls in the relay because the relay is staying energized. when the key is on.
Aug 19, 2011 at 6:53 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
The computer grounds the fuel pump relay -relay could be sticking
Aug 19, 2011 at 6:59 PM
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WADEWYNN
  • MEMBER
  • 2 POSTS
the contacts are open until coil is energized
Aug 19, 2011 at 8:16 PM
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