Cap and Rotor?????? The 93 has DIS. When was the last time the fuel filter was changed? Should be every 30,000. Its cheap and easy to change.lawngodfather said:Pardon me, but you can have dirt in your lines all your life, and it won't effect a darn thing, plus if it's in there, it's not going anywhere with "fuel system cleaner". If it's after the filter, nothing is going to help it at all.
Timing is off is the most common symptem in all engines. Start with new plugs, wires, cap, and rotor.
Try that, then report back.