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1 0f 4 idle mixture screws not responsive

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Old Sep 4, 2008 | 10:06 PM
  #1  
SDIF's Avatar
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Joined: Oct 2003
Posts: 544
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From: Aiken, SC
Car: 91 Z/28, 89 RS Race Car
Engine: 305 stock / ZZ4 AFR 195 9.7:1
Transmission: T5 / t10 / Jerico
Axle/Gears: 10blt w 3.42, 9 in w /3.80 DL
1 0f 4 idle mixture screws not responsive

The passenger side rear idle mixture screw has no effect. The other 3 do.

What would cause this?
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Old Sep 4, 2008 | 11:38 PM
  #2  
five7kid's Avatar
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
A plugged idle circuit on that corner.
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