I had to go back and forth with mine. You wanna ensure that it is fully open once the coils are completely warm. You can watch as it opens up after the ignition is switched. I live in a relatively warm area so I don't need much choke; colder areas require more attention. The fast idle cam works with the choke needs to be adjusted as well, that's on the underside of the choke assembly. I've seen folks make the adjustment while the carb is bolted on, I'm not that good, I take it off and trial and error it till it's where I want. Choke alignments are typically the most difficult to perform since you need your truck both cold and hot. Good luck.