Well, is it a MTX or ATX?
How about putting some HEET (or gas stabilizer) in the fuel tank?
Changed air filter?
Maybe it is time for a new MAF sensor.
And did you check the spark plug wires were in the correct order (remember it is 465 at the firewall side of coil)?
And were they gapped 0.054 inch?
And as suggested, maybe the fuel pump.
