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97 Sonoma fuel pump

Tiny
KEVINLAVANWAY
  • MEMBER
  • 1997 GMC SONOMA
  • 6 CYL
  • 4WD
  • MANUAL
  • 150,000 MILES
97 Sonoma 4.3L will not start. New fuel pump clicks but does not run for 2 seconds when I turn the key on. New fuel pump.
Tuesday, May 17th, 2011 AT 1:06 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Test for power arriving on the gray wire during the 2 second pulse period. Even if there is a problem with the fuel pump relay, it should still be powered during cranking through the oil pressure switch. Also check the 20amp "ECM BATT" fuse #9.
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Tuesday, May 17th, 2011 AT 1:14 PM
Tiny
KEVINLAVANWAY
  • MEMBER
  • 5 POSTS
I can hear the fuel pump click, but not run. And it only does it in the morning when its below 40 degrees. If the temperature is on the rise, I can bump the key/starter usually 20 times and get it to start. New fuel pump, new filter.
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Wednesday, May 25th, 2011 AT 12:28 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
OK, let me know when you have finished with the testing I requested.
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Wednesday, May 25th, 2011 AT 1:02 PM

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