I recently installed a new Holley Street Avenger 770 w/manual choke. Shouldn't the engine idle faster with the choke closed? Opening and closing the choke doesn't change the idle speed. Do I need to adjust the idle mixture screws? I need to hold the throttle open a bit until the engine warms up. Thanks
Many US autos used to be built with manual chokes. When you pulled the knob out from the dash you applied choke to the carb and yes the engine then runs faster. For that matter when it is cold it is the difference between the engine continuing to run and not running.
Yes. (unless it's closed so far the engine is gargling on gasoline) It should. (Provided the throttle is opened enough in between the opening and the closing for the fast idle cam to move.) Probably. However, that's not the idle-speed problem. No, you shouldn't have to. That's what the fast idle cam is for. Adjust the fast idle screw. Overall, a manual choke is a hateful device. Automatic chokes are a mature technology; they work TERRIFIC when adjusted properly. Adjusting them properly is not at all hard--but--it's also becoming a lost art ESPECIALLY with people more interested in "performance" than "drivability" even though the two terms are not mutually exclusive. Don't get me wrong--you're gonna need to fix the fast idle no matter what kind of choke you have. I'm just saying that if you have a perfectly adjusted manual choke; and you upgraded to a perfectly adjusted automatic (probably electric) choke, you'd never look back and you'd shake your head and wonder why you put up with a manual choke as long as you did.
