Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Rich idle

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kenn:
Hello I rebuilt my carb with cliffs hp kit and some help from him and his book but he is a busy man so I thought I would ask here.
 The idle runs rich enough to smell it at the exhaust. (Not after idle) So I think the idle system needs to be looked at.

     Idle tube  .037
     Air bleed's .070
     Idle restriction .054
I was woundering if I should open up the upper air bleed or close the restriction?
 I know the bleed would be easer but I think the restriction is a bit to open.
Thanks.

77cruiser:
What's the combo? How's the timing?

kenn:
The combo basically is a mild sbc for work on highway by an old guy that is trying his hand a complete rebuild. It's been going good with some problems but that's what it for takes me to learn sometimes. Like when the book states to start small and enlarge if you have to, I think that's my problem with a rich idle. The restrictions are to large allowing the mixture to be to rich.
 I think it would work with .051 but I don't know how to make them smaller (.054 now) or if they are just replaced?
 I also think I could enlarge the upper bleed but I'm not sure about that.
Thanks for your help.

kenn:
I still think I need to make the idle down channel smaller. Can I pull them out and install a sized plug? Is the depth of the restriction important?   Thank You   Sorry about long post.

 I have a 72 c 10 with a stock 350 trany, 3.08 rear end. Timed at 14BTDC
  350 sm blk .30 over, flat top pistons. aluminum 2.02 int 64 chamb , performer intake.
 Quad Recipe;
  Idle tube: .037
  Down chan: .054
  Upper and lower air bleed at .070
 Acc discharge holes:.030
 Main air bleed .083
 Main jet: .074
 Main rod: 50M
 Fuel inlet:  .135
 Float level: .250
 secondary tube restriction: .033
Secondary hanger:  M
  Secondary rods:  DA
 Secondary spring:  1/2 Turn

Bypass air : .046

 

omaha:
the idle down channel restrictions are replaceable. (95% sure)  the bleed can be "peened" smaller and redrilled. What cam does this thing have??

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