whats up guys, ive searched on this topic many times. ive read to clean the iacv, fitv, adjust the idle, alternator. blah blah..i cant get a real answer..people havent really found the root to my problem..my cars alternator is fine. replaced recently, has the right voltage, just replaced the radiator (could air bubbles be the cause of this?) battery is new, no check engine light although im getting code 1 o2 sensor.

on cold starts, car idles fine, smooth, no bogging whatsoever. the throttle feels tight and responsive. when it gets to regular temps, everything still runs fine sometimes . when it gets a little colder outside, it starts to bog, the throttle feels loose and makes it seem i have to literally almost floor it to smooth out the bogging. and if i put my car in neutral, it'll shut off and bog

sorry for the long post, i just thought someone would tell me the root to this problem because people say they have fixed/replaced common problems and there car still have idle/ boggin problems

any help is very appreciated

 

bump..i unplugged all the sensors that go by the breather chamber, cleaned em off, plugged them back in, seems to be better ill update