Please help!

1984 GMC TRUCK
160,000 MILES • 5.7L • V8 • RWD • AUTOMATIC
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LACEE1994
  • MEMBER
  • 1 POST
I have an 84 gmc sierra classic 1500 350 v8 holly 600 4 barrel carburetor. When it's idiling it runs fine when shifted into gear it starts idiling rough when I press the accelerater it starts to spit and spudder and hesitates to go. I've already tried replacing the spark plugs and wires distributor cap and rotor. And just rebuilt the carburetor.
Feb 25, 2016 at 1:44 AM
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CATAFINA
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 167 POSTS
Go thru this links: https://www.2carpros.com/articles/engine-misfires-or-runs-rough

https://www.2carpros.com/articles/engine-hesitates
Feb 25, 2016 at 2:29 AM
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HMAC300
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 48,601 POSTS
check for a vacuum leak first like hoses etc and under carb. then recheck your rebuild specs you may need some more added to accelerator pump
Feb 25, 2016 at 6:02 AM