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1973 Other GMC Models carb

Tiny
FRANKAPPLEGATE
  • MEMBER
  • 1973 GMC
Engine Performance problem
1973 Other GMC Models V8 Two Wheel Drive Automatic

what is the idle turn out supposed to be at on a holley 4 barrel? Its a gmc sprint with a 350
Thursday, May 7th, 2009 AT 8:43 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I am guessing you are talking about the fuel/air mix on this. Lightly seat them then turn out 1 and 1/2 turns. Then put a tach on the car and get your highest rpm adjustment. Then adjust your idle to specs.
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Saturday, October 10th, 2009 AT 9:22 AM

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