Ok I own an 08 Altima coupe 3.5 l 6 speed manual transmission. Well I love this car. Recently however its gone into a fit I can't figure out. I did a tune up nd cleaned the throttle body(aware that a relearn would be necessary). Ever since it high idles until warm and then surges from 1500 to 2000 rpm. I have tried every relearn I could find even unplugging one injector at a time to bring the idle down no luck. I then got ahold of a launch scanner and tried an air volume relearn still no go. Next I took it to a shop they had it for a week and couldn't figure it out. So I take it to the dealer. Well I have a breathalyzer in the car and they refused to work on it due to coronavirus even though I supplied new mouthpieces and sanitized the unit. So I'm at a loss and turning to the internet for help.