Also when I kick the air conditioner on the whole idle at 14.7 is out the door it idles like around 11.7? DOes this just prove that a car does indeed use more gas when running air conditioner? WHen I turn it off it will go to around 14.7 area. And how hard is it to fix the ticking from the valves or lifters. Someone said they can be tightend down. Is this true if so how hard is it to do? Or how much usually to get someone to do it?