1998 gmc k1500

1998 GMC TRUCK
167,000 MILES • V8 • 4WD • AUTOMATIC
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SCREWDRIVER33
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  • 3 POSTS
1998 gmc truck hard to start when cold or sitting for hours
Jan 4, 2011 at 5:30 AM
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FIXITMR
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  • 9,990 POSTS
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when was last tune up? how cold is it? are you using premium gas?
Jan 4, 2011 at 5:43 AM
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SCREWDRIVER33
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30,000 ago, 35 to 60deg f , using reg unleaded. I suspect fuel system or evap system. Have no driveability after start. drive 20 miles one way.
Jan 4, 2011 at 5:56 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
You could be losing fuel pressure -check the actual fuel pressure with a gauge if its within specs-if okay test the coolant temperature sensor also clean out the idle air control valve and see what happens-
Jan 4, 2011 at 7:06 AM
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SCREWDRIVER33
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I just replaced coolant temp sensor. will check fuel pressure tomorro and try to clean iac valve. thanks for the help.
Jan 4, 2011 at 7:17 AM
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