Originally Posted by rick130

Double check the pump timing, as if it is slightly retarded, it will make the engine feel sluggish.
It can be the difference between the locking pin sliding in easily and a tight fit in the hole and plate.
After one belt change the engine didn't have the 'zip' I thought it should have on the test drive. Checked the pump timing and the pin went in but it was 'tight', so loosened everything off and reset as above and it was immediately better.