Moparts Tech Archive
Chokes, adjustments and Q'sChoke thermostat P/N needed?
Just double checking a P/N. I was given P/N 2951653 for a choke thermostat for a 70 Roadrunner with 383 4 barrel auto. Carb #4734s AVS which is Calif built. I was told this P/N was used on 70-72 Carters but I was also told that Chrysler made 5 different versions. Is this correct and if not does anyone have a correct P/N. Any help would be appreciated.
Fast idle may be adjusted to manufacturers specifications (usually 1500 rpm) during normal choke cold operation. The fast idle screw A can be adjusted with engine off and throttle held open to allow screw head access. Recheck fast idle speed after each adjustment.
The length of time during which the choke will stay closed is determined by the position of the choke cap. As the choke cap is turned clockwise the choke will stay closed longer. To properly set the choke turn the choke cap to the leanest notch on the choke housing, tighten the choke housing retaining screws, and run the engine until normal operating temperature is reached. With the engine running, slowly turn the choke cap clockwise until the choke valve begins to close. Now turn the choke housing one notch counterclockwise (LEAN) and tighten the choke housing retaining screws. Periodic readjustment of the choke will be required as the temperature changes throughout the year. After each adjustment verify that the choke valve opens fully after the engine is warm.