MAJOR IDLING PROBLEM

Hi, I have a 2002 nissan sentra gxe automatic 1.8l
Its been having this idle problem for about 2 months now and I can't figure it out
Today I replaced the tps and it didnt do anything with the problem
it shifts from first to second really hard then after that its fine

also when at a light and hit the gas pedal it bogs down and sometimes stalls but usually the idle shoots up

Also in drive it idles at 1k rpm

In park and neutral is idles steady at 1800-2k rpm.

I had a tpc ciruit malfunction code last time when I checke the code. So I replaced it. The car use to run really good until this.

Any suggestions would help please