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1994 GMC 2500 5.7 fuel pump

Tiny
STEVE BORNHORST
  • MEMBER
  • 1994 GMC C2500
  • V8
  • 4WD
  • AUTOMATIC
  • 163,000 MILES
Why does the fuel pump run for 20seconds with the key in the run position before you try to start the engine. I just replaced the fuel filter and thats when I noticed how long the fuel pump was running. The truck has 163000 miles runs good and starts goods I just want to know if you think it is a fuel pressure regulator is going bad?
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Sunday, November 21st, 2010 AT 3:32 AM

2 Replies

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
Negative, fuel pump turns on when you turn the key on momentarily until it is up to pressure, when you crank the engine and fuel pump comes back on, after changing the fuel filter most likely it stayed on a little longer. That is normal
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Sunday, November 21st, 2010 AT 4:42 AM
Tiny
STEVE BORNHORST
  • MEMBER
  • 3 POSTS
Thank you for answering my question. I am glad to know that everthing is ok.

Thanks again
Steve
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Sunday, November 21st, 2010 AT 3:45 PM

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