Hesitation decrease rpms when AC on or turn steering wheel

it's quite common actually. have you ever noticed when you have your lights on at night and you turn on your AC and the lights dim?? Probably because it takes that much current from the battery to start and it affects how other systems work. I DOUBT that it is on the same circuit ( making it a series circuit so the lights would dim much worse). I have only noticed the gas tanks to be a series circuit ( because of the 2 pumps for 2 tanks). and also your AC wont work perfectly when you turn it on, it will take a few miles of driving for it to get to spec. I've noticed several questions on here where people just want to drive but they don't want to understand the basic functions of the vessel. you have probably noticed, too, that when the AC is on, it is making the motor work harder and therefore your mileage is being destroyed. good luck

Thanks for reply. Never had this issue until recently and was thinking potential Computer issue or O2 sensor problem? Battery is under 1 yr and so is last tune up. Fuel pump is newer too

I cannot get my back pump to work either ( check light come on every time). I have actually considered my ECU as well. Cannot find it either, and it's cheap to replace. your 02 is an emission thing. Has nothing to do with what you are dealing with. Going to be a long week. Good night from Utah

Thanks