1991 GMC Sierra won't start

1991 GMC SIERRA
170,000 MILES • V8 • 4WD • AUTOMATIC
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BINGONANNY55
  • MEMBER
  • 1 POST
my husbands truck won't start unless you spray starter fluid or gas into it then it runs good but turn it off and it will not start untill you spray it again. can you help with this problem
Jul 16, 2008 at 10:43 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do you hear the fuel pump for 2secs when key at run -if not check the fuel pump relay-the oil pressure sending unit powers the pump after it starts up-there's no initial fuel pressurization-


https://images.2carpros.com/forum/automotive_pictures/12900_oil_sending_unit_and_fuel_pump_circuit_62.gif

Jul 16, 2008 at 10:53 AM
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