Mitcheller

I recently hard car problems with my car not running right. i changed the tps and now it runs fine...whilst it's cold. but once it warms up the gets really laggy and bogs under 2k rpm but once it reaches 2k rpms it hits a powerband of sorts and pulls hard like it always did. anyone have any idea what could be wrong?

B_Swapped93

ignition timing on as well as mechanical ?