My toyota truck which has a 22re motor has poor accelaration. It has good compresion. I am fed up with trying to figure it out. It has a new fuel pump and fuel filter still same reaction. It has a new head on it beacue when i bought it it didnt have one on it. So it has a new top end on it. Starts and idles fine. And when sitting still revs up well but whne driven it wants to hesitate/poor accelaration. Can someone help me.

Could be a clogged Cat Conv.