Thread: Cylinders 2,4,8 running rich
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Old 05-25-2011, 09:04 PM
llwalkman llwalkman is offline
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Join Date: Mar 2011
Location: Longmont, CO
Cobra Make, Engine: 1965 Mustang Fastback
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Default Cylinders 2,4,8 running rich
I am running out of ideas here. Need some help please:
65 idles
150 mains
200 air
Idle screw 1 turn out.
Idle jet holder 1.00

Cylinders 1, 3, 5, 6, 7 spark plugs are light grey
Cylinders 2, 4, 8 spark plugs are sooted black.
AFR reads at cruise ranges from 13.1- 18.5
AFR on acceleration ranges from 10.9 to 13.1
AFR at idle is 25.0 to 38.0

I know I am running lean but cannot figure out why the trailing barrel of the weber carb is running rich. Any ideas? Thanks
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