Hey guys, have a bit of a weird one that I haven't been able to quite sus out...

Every now and then (3x in the last year), when I'm driving in very cold conditions (late last night, in the snow the time before that), I'll be driving and while partial throttle will be ok, anything past half throttle results in the car bogging down and losing power. If I clutch in and try to give it a bootful, she'll bog down and wont get past 3k rpm. If I clutch in without revving it, she sits around 1500rpm, higher than her usual 800-900rpm idle. By the time I pull over to whip the top of the airbox off to have a look, the issue seems to resolve itself. Last night, I just pulled over for a minute and let it idle, and it was all good.

Would I be right in thinking it could be improper operation of the automatic choke? That basically, on the freeway last night, intake temps were so low it caused the choke to kick back in, and so when I'd put the foot down she'd run rich because she wasn't getting enough air? Would also explain the high idle?

Is there an adjustment for when the automatic choke kicks in, or can I disable it somehow?