Originally Posted by T-bucket23
Choke is taking to long to open. Do you still have a heat riser valve in the exhaust and is it free. The choke should be fully open in about 3 minutes or so and should never close up while running. It appears in the video yours actually looked like it closed a little a few times during the warm up cycle
The truck doesn't have a heat riser valve. And yes, the choke plate does seem like it moves back towards the closed position a few times. Should I try a new choke?