How do i adjust air fuel ratio on carb
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Joined: Mar 2012
Posts: 117
Likes: 0
From: New York
Car: 1985 IROC-Z H.O. 4bbl
Engine: L69 Small-Block, 305
Transmission: Borg-Warner T5
Axle/Gears: 3.73
How do i adjust air fuel ratio on carb
I have a 1985 iroc 305 H.o... I was wondering how i could change the air fuel ratio on the carb . Because it seems to be. That when i rev the car up and then let go.. It starts to drop in rpms untill it hits zero and then the car shuts off
On Probation


Joined: Apr 2007
Posts: 1,592
Likes: 18
From: Syracuse NY
Car: 84 Z-28
Engine: 305 HO
Transmission: r-700
Axle/Gears: 3:73
Re: How do i adjust air fuel ratio on carb
Also check for a loose idle stop cam or linkage also your idle boost solenoid.
You may just have a vaccum hose leak which also effects idle speed.
The idle mix adjustment screws are "sealed" in the stock Q-jet.
You may just have a vaccum hose leak which also effects idle speed.
The idle mix adjustment screws are "sealed" in the stock Q-jet.
Joined: Mar 2000
Posts: 43,187
Likes: 42
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
This is one of those rare cases where it would be best to determine the cause of the problem before you start to fix it.
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