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My truck have no spark and the fuel pump dont.

Tiny
ANONYMOUS
  • MEMBER
  • 1997 GMC SONOMA
  • 129,270 MILES
My truck have no spark and the fuel pump dont turn on. It have a new fuel pump, computer, module, coil and still no start. My dashboard lights and gauges dont turn on neither fuel pump.
Sunday, December 2nd, 2012 AT 9:45 PM

1 Reply

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
I wasn't sure of engine litre size? I looked at 4.3L engine. Did you check voltage and ground for the pump motor at the connector? Check the ecm bat fuse for voltage. Will the starter motor crank? There is an oil pressure switch in the fuel pump circuit. If you crank it enough to bring up oil pressure and the swtich closes, the fuel pump will run regardless of relay.
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Sunday, December 2nd, 2012 AT 10:05 PM

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