ok so my air works kinda good but the ac compresser stays on all the time no matter what setting the control unit is on it stays on.

i have a 90 camaro rs tbi bone stock it still has the stock everything

now i wanna drain it and change the tube and vac down and refill but i dont wanna do the work if its not worth it my dad put some refill can and idk what it was think some walmart brand im looking for the can now but it had this problem before hand. so i dont think it leaks cuz it stays kinda cool.

also my oil presser gauge drops to 0 and flickers and battry gauge charges at 18 so i think there is a wiring problem so any ideas would be helpful

goal is to restore the car to its former glory hahahaha not that it really had any lol

 

Change the oil pressure sending unit, Take out the dash and the volt gauge and put a meter to the posts, do the same at the battery.