I have a Holley carb with electric choke. I have a manual transmission. When the engine is fully warmed up, the idle when shifting from gear to neutral will stay too high. So, let's say I'm shifting from 3rd to 4th, the rpms will stay pegged high in between the shift. Likewise downshifting from say 2nd to idle while coming to a stop, the rpms will stay high at like 2500 rpm stopped in neutral. I have to hit the gas to get it to come down to idle. I've had two shops look at it and this still happens. I had someone suggest I check the volts at the choke to make sure I'm getting enough power to it. The two shops say it's adjusted right and nothing is binding against the fast idle screw. Any ideas? This makes the car a chore to drive so looking for help.