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**Corts60** · 11-15-2014, 07:56 PM

The best way to set idle/mixture is by a vacuum reading. You adjust them one at a time until you achieve highest vacuum reading. Attach the gauge to any manifold vacuum source.

11-15-2014, 07:56 PM	#6
Corts60 Just here to tinker Join Date: Jun 2008 Location: Holland, MI Posts: 3,698	Re: Adjusting Idle Mixture Screws Does Nothin - Quadrajet The best way to set idle/mixture is by a vacuum reading. You adjust them one at a time until you achieve highest vacuum reading. Attach the gauge to any manifold vacuum source. __________________ 78 C10 SWB Diesel #1 (wrecked)http://67-72chevytrucks.com/vboard/s...1978+silverado 78 C10 SWB Diesel #2 (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=650751 60 GMC Suburban (sold)http://67-72chevytrucks.com/vboard/s...d.php?t=445526 60 GMC 1000 (sold)http://67-72chevytrucks.com/vboard/showthread.php?t=298235 67 GMC 1500 (sold) http://67-72chevytrucks.com/vboard/s...d.php?t=803695 73 Chevy C20(Daily)http://67-72chevytrucks.com/vboard/s...d.php?t=852767 86 Suburban(summer unit) http://67-72chevytrucks.com/vboard/s...d.php?t=810697 88 Suburban 4x4(sold)