OK! so I unplugged my front o2 sensor and guess what. First thing it transitioned properly and the A/F didn't spike up with partial throttle.
The only thing was that its lean to start of with (16-17 A/F). The main test was when I went partial throttle it didn't spike up and the A/F transition lowered. Heck it felt just as smooth running higher 16-17 A/F as it was running 14.4-15 A/F with the o2 in.
Also, my car idled nicely. Usually at first start it goes a little all over the place but perfect once warmed up.
I hope to god this is my issue.