Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor
Tuning Idle Pontiac 400 with 17058276, Comp xe262h
Cliff Ruggles:
I usually end up around 4.5 to 5 turns up. This is putting the metering rods tapered section between steps high in the jets. Fine as long as the hanger arms are EXACTLY even, and you are reducing travel distance which speeds up enrichment ever so slightly........Cliff
PonchoVia:
Would that not indicate a need for 1 size larger jet? And put the rods back down a bit?
Cliff Ruggles:
No, the APT tunes light part throttle. The jet size should be determined first as it controls heavy and full throttle fuel delivery......Cliff
PonchoVia:
OK, lets move back to the choke.
I think its close to being correct.
question is, there is nothing else other than gravity to move the fast idle cam down as fast as, and as far as the choke mechanism will allow?
Im pretty sure I had the screw that holds the choke assy to the body of the carb too tight causing a bind in the mechanism.
Cliff Ruggles:
That screw needs to be tight. If you find that it is binding thing up you may have issues with the choke shaft parts. I've had to "tweak" a few where the part is staked to the center shaft to create some distance for things to work like they are supposed to.......Cliff
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