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Hello and welcome to just answer. Thereare several other things that can cause a rough running problem besides the fuel system. Things to check are 1 engine compression, spark plug wires, distribuor cap and rotor, a stuck open EGR valve (if equipped ) vacuum leaks and restricted or plugged exhaust. The first though is to perform a compression test. All 6 cylinders should be around 140 to 165psi, and should be within 25 psi of each other. If it is low, then suspect a valve problem and remove the cylinder head and send it out for a valve job.
I hope that this information is helpful and please let me know if you need further assistance.
Hmmmm, I doubt it . If it was wiring, then it probably wouldn't even run.
Maybe the plug wires though.
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