Who knows how to adjust the Q-jet choke? It's stuggling to cold start and I've honed the problem to the choke. It's not closing all the way. When I press the accelerator to set it, there's still a bit more than a 1/8" opening. I can push it closed, but the rod isn't pulling it enough. '72 455-4V
You have to bend the choke rod to enable it to "reach" further to pull the choke all the way closed. It is a pretty small amount you have to bend it. If you go too far, you'll end up with another problem. Bend a very small amount at a time and test the throttle to see if it closes completely.
The choke butterfly, when the linkage lockout is released, should just touched closed at 68 degrees F. and a cold engine. 65~70 degrees is close enough. If the temperature is warmer, the choke plate will not completely close. Colder, and the plate will be closed with tension. Always work the throttle lever on the carburetor from closed to wide open and release before attempting to adjust the choke. This releases the lock-out, and allows the choke to close. Possible causes of a choke not closing: (A) failure to press the footfeed to the floor releasing the lockout (B) placing a gasket of the incorrect thickness under the carburetor (C) installing a spacer under the carburetor (D) a fatigued choke spring As mentioned by the other poster, the adjustment is accomplished by bending the rod from the divorced choke (on the manifold) to the carburetor. Jon.
Thanks for the help, guys. It's much better now. A little more adjustment to go, but didn't want to go too far at one time.
