1973 GMC C1500 idle

1973 GMC C1500
58,000 MILES • V8 • 2WD • AUTOMATIC
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SIMMONS1
  • MEMBER
  • 1 POST
when my truck is stopped at idle it runs very rough. it runs fine when it is our on the road, but when i stop at idle it runs rough to the point that is almost quits. when in neutral it is ok, but when it is in gear at idle is when it runs rough.
Nov 23, 2008 at 11:10 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the fuel presssure, ignition timing, adjust A/F mix and curb idle, test the PCV and EGR valves.
Nov 23, 2008 at 11:16 AM
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