Toyota Repair: toyota repair, vacuum lines, toyota repair

Question
i have an 89 toyota pickup and it sputters really bad.
i've changed spark plugs,wires,fuel filter,and the pump.
it ran fine for a while after that but then it went bad again and every time i crank it up it acts like its camming.and its real sluggish.

Answer
Zach,
I really need more info. Is it a 4 or 6 cylinder?
How many miles? If 4cyl, is if fuel injected(EFI)?
Is it at idle, driving, or accelerating?
Does it happen when engine cold or hot or both?
Have you closly inspected all vacuum lines?
Have you checked the EGR valve?

Tim,
ToyDoc