Dumb simple things first. Did you pick up a tank of ****ty gas? Battery's good with tight connections? Dirty injectors? Intake vacuum leak anywhere? Pinched vent tubes or plugged valve?
If none of these bring a solution, and you've already done plugs, wires, & TPS, you may be looking further upstream at the coils & ignition module. Also the O2, IAT, ET, & CP sensors are possibilities.
Good luck!