1989 GMC C1500 runs rough

1989 GMC C1500
120,000 MILES • V8 • 4WD • AUTOMATIC
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TESALL
  • MEMBER
  • 1 POST
when i start my truck it runs fine till it warms up then it kicks down and struggles to stay running
Mar 27, 2010 at 2:31 AM
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JDL
  • ✓Experienced Mechanic
  • 16,098 POSTS
Hi, are you carbed or fuel injected? How long since a tune-up? Use a gage and check fuel pressure, what is the fuel pressure spec? Any applicable trouble codes?
Mar 27, 2010 at 3:01 AM
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