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mixture screws not working?

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Old Apr 5, 2013 | 11:30 PM
  #1  
evilemokid94's Avatar
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From: Elwood, IN
Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
mixture screws not working?

I have a carter 600 afb carb and when I screw the mixture screws qll the way in or out my carb seems to take no adjustment. The motor doesnt try and die or anything. Is this normal? I took the screws completely out when it was running and the motor stayed running. I had my step dad rebuiod the carb and it works fine besides this issue.
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Old Apr 6, 2013 | 01:43 AM
  #2  
skirkland1980's Avatar
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From: morrow, ga
Car: 82 S10, 83 280ZX, 84 Z28
Engine: 355 smallblocks..na, 2.8 turbo
Transmission: 85:th350, 84:700R4
Axle/Gears: 85:ford9 4.85, 84:stock 3.24
Re: mixture screws not working?

It may still be getting fuel from somewhere. Maybe float adjustment or too much fuel pressure.
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Old Apr 6, 2013 | 09:36 AM
  #3  
Johnny Blaze's Avatar
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Re: mixture screws not working?

Idle speed screw set too high, bypassing the idle mixture circuit.
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