loss of power when warmed up. please help!

[TsiJohn333]

Hey guys im having a few issues. When I boost on a cold start the car pulls like crazy! And drives perfect! It really sucks me back to my seat and boosts like it should. After the car is fully warmed up, it doesnt pull nearly as hard and seems to have lack of power. Any suggestions to why this is?

 

[BurrowZ]

Got any CELs?

When something is attributed to "only when warmed up" I usually start checking the o2 sensor to make sure it is going into closed loop.

 

[TsiJohn333]

Thanks for the quick reply. I just replaced my front o2 sensor not even two Weeks ago. no cels though. I do have a good tune on the car as well and have no knock.