Quadrajet Problem Solving > Dialing in your rebuilt Quadrajet carburetor

Idle adjustment

<< < (3/3)

1967CHEVYII:
This thread helped me. I'm trying to pass emissions with the throttle blades TOTALLY CLOSED.


I am getting high HC.

Idle at 500 RPM.

Is an emulsfied mixture of air and fuel getting dumped from the idle ports?

Obviously the idle mixture screws control the volume of (whatever) is emitted from the idle ports.

I assume I need more air (via cracking the primary blades) to "lean" the emulsified mixture being emitted.

The "sweet spot" i presume, is to open the IMS as little as possible and open the primary blades wide enough via the curb idle screw, while not activating the timed vaccum port AND accomplishing desired idle RPM?

Am I on the right track?

-Adam

Navigation

[0] Message Index

[*] Previous page