83 not so good after o2 fix, why?
 

It seems like since i replaced my 02 sensor and put in unleaded gas for the first time in the tank, my car is not performing as well as it used to. I noticed it wont always idle around 900..sometimes it goes to 1100 and rests there. Sometimes when i start the car the idle will drop and i stall. Sometimes its fine. I also notice a bit of hesitance when accelerating, a bit of a studder sometimes...it feels like i press down on the gas and it slowly goes..then it jumps forward, like its stuck. Whats going on? Its an 83 5 spd 70k mi w/ a pretty recent tune up.

Heres another example. I drove the car to publix and parked. I came out 5 min later. I turned the key and it cranked for about 3 secs so i stopped and turned the key again and it started up. Then it idled around 600 or so kinda hard, the battery light flickered...like i was going to stall, then it fixed itself to 900, then went to 1100 and stayed there.

how are the connections on your battery looking?

great battery connections..just put new ones on a week ago.

maybe i need a chip from mr. wilk?

could be your grounds... check your main battery and main engine ground....

Today when i started the car up it got worse. It idled hard from 200-900 and squealed every time. Im guessing a belt problem? It goes away once i drive for a bit, but it screws up a lot in neutral. This problem went away but now its back. The squealing is new.