i had a pump once do somethin like this,,it was running good,then started smoking like you described,,and even quit, ran like crap,i towed it home,and a few hours later,it started up and never gave me a problem again :?: usually lazy throttle response can be a suction side problem,,but it smokes bad,so probably not that,,,,,,let the atf cocktail clear out of it,run it out of a can,,just diesel,,,,see if itll clear up