i have an EB 2 auto ,when i turn on the A/C after about 10 minutes when taking off or just driving it either holds 3 third gear for ages of if im allready driving it will downshift back to 3 third and just hold it untill i put the foot down then back off then it goes to 4 th .the engine temp is perfect .i just changed the head a few months ago is there a relearn procedure for computer and the gears cause i just reconected the battery after being dissconected for 2 days and started driving.and the idle when the A/C is not right either to low .

thats quite normal, as the ecu will change the shift points when the a/c is on. The only thing that will make it worse is if you have a leak on the map sensor hose.

i didnt have a problem with the idle before the head change map sensor pipe is new