Need Help with My 8
 

OK let's go down trouble lane, its 2004 under 30.k AT , Stock as new ,
first issue was coolant was leaking from one of the freeze plugs so i charged all 5, just received a new overflow bottle, wile i re-installing the trans, we had some bad weather and i water got inside of the torque converter, did a flush, but ended up doing two trans fluid change cause the oil was pink( fluid + water = pink ATF fluid, ok now after getting all this done, new gasket etc... the 8 is back running but when i hit over 4000rpm i get a rattling sound, is almost as if is strugling to get up to speed, but it shifts fine in 3rd and im good to go, now my Airpump gone, and im guessing has my cat converter in quite a mess since and once tit reaches temp slows down, i have ordered a new set of coils, wires and plugs, had the car on a computer and all i get as far as code was the airpump,
at cold car start up no problem , will drive and pull , then my issues are here again,