no start

1999 GMC SUBURBAN
222,300 MILES
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RANDY WATSON
  • MEMBER
  • 2 POSTS
engine will not run. replaced gas tank, fuel pump. engine runs with gas being poured into throttle body, but when you quit pouring gas engine stalls.
May 15, 2017 at 6:54 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,542 POSTS
Hello,

It sounds like the fuel pump is not getting power. Can you hear it run in the back?. Here is a wiring diagram for the fuel pump and the location of the relay.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken
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May 17, 2017 at 9:10 AM
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RANDY WATSON
  • MEMBER
  • 2 POSTS
have power to fuel pump can hear pump turn on have 6opsi to fuel rail
May 18, 2017 at 1:00 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,542 POSTS
Excellent, Now let see if the injectors are getting pulse, here is a guide that will help.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Please run this test and get back to us so we can continue helping you.

Cheers, Ken
May 18, 2017 at 3:50 AM
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