I HAVE A 4

  • Tiny
  • Anonymous
  • 1990 GMC Truck
  • 100,000 miles

Hi I have a 4.3 small truck and the motor races when started I changed the carb base gasket, carb idel up sol, computer temp sender, even blocked the egr valve any ides.

Sunday, December 9th, 2012 AT 2:43 PM

1 Reply

  • Tiny
  • hmac300
  • Expert
  • 43,674 posts

Scan for codes and check fuel pressure first. Check for a vacuum leak

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Sunday, December 9th, 2012 AT 3:58 PM

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