On my dad's 93 LX, the moment you hit the throttle there is a slight hesitation like it wants to go but is restricted. After stepping on the gas for about 2-3 seconds, it finally wants to go. Pretty dangerous. He's already replaced the fuel filter, checked plugs, etc. right now he is in the process of replacing the TPS. Your thoughts/ suggestions? Besides get rid of a 4 cylinder "Mustang", I've already told him that a bunch of times. lol He's actually trying to sell it, that's why we're trying to fix it.