1999 GMC Sonoma hard start

1999 GMC SONOMA
97,000 MILES • 4 CYL • 2WD • AUTOMATIC
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GUYONTHEMTA
  • MEMBER
  • 10 POSTS
Hi there I have a sonoma with a 2.2l in it and when its been run up to temp and then sits for a little while it is hard to start it takes a few seconds until it starts ok. I replaced the fuel pressure regulator, plugs, wires, new intake gasket, the fuel pump is working fine, replaced the engine coolant temp sensor, but just cant figure it out.
Sep 23, 2009 at 7:08 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Hi there guyonthemta and TY for the donation

Could be low fuel pressure -check the fuel pressure with a fuel pressure gauge designed for your system if its within specs-check and test the fuel pump relay and fuel pump and oil pressure sending unit
Sep 23, 2009 at 7:20 PM
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