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
  • 46,431 POSTS

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

Was this
answer
helpful?
Yes
No
Sunday, December 9th, 2012 AT 3:58 PM

Please login or register to post a reply.