1998 GMC FUEL PUMP STOPS WORKING

  • Tiny
  • Lyden62
  • 1998 GMC

Engine Performance problem
1998 Other GMC Models V8 Four Wheel Drive Automatic 139000 miles

I own a 1998 GMC Suburban and am having a fuel delivery problem. The truck will start fine if cold, I run around town making a few stops and then the truck will not start again. I had the truck towed home and replaced the fuel pump with a factory unit based on the vehicle VIN #, I also replaced the fuel pump relay with a factory part and fuel filter. This is the second replacement fuel pump, previous pump lasted 2+years was also a factory replacement based on VIN# and the starter was also replaced at that time. With new pump it starts fine when cold but after running for 1/2 hour or 45 minutes I turned the truck off and when I went to start it 10 to 15 minutes later no fuel gettng to motor. I sprayed starter fluid in throttle body just to check it started but would not continue to run. A couple of hours later the truck starts and runs fine. I did notice the motor seemed to hesitate and almost stop but would catch and idle fine again after a couple of minutes. Need advice, Steve

Sunday, September 21st, 2008 AT 8:08 PM

3 Answers

  • Tiny
  • rasmataz
  • Member

Do this get it to run again while idling remove the fuel pump relay did it continue to run or died out?

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Sunday, September 21st, 2008 AT 8:13 PM
  • Tiny
  • Lyden62
  • Member

Rasmataz, the car died when relay was removed. I replaced relay restarted car and checked again same result.

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Sunday, September 21st, 2008 AT 8:57 PM
  • Tiny
  • rasmataz
  • Member

Replace the oil pressure switch


http://www.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_75.gif

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Monday, September 22nd, 2008 AT 1:18 PM

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