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Sorry I didn't look over this thread Cal98Civic. A couple of suggestions.
1. At night when it is dark take a spray bottle with water in it and spray it over your ignition wires. Look carefully for any visible spark. If you see any replace the wires with new ones. Don't buy cheap stuff, the blue Bosch wires are good. Get wires made for the car if you see any spark in the dark with the wires dampened with the water mist. DO NOT GET TO CLOSE TO THE WIRES OR YOU MAY GET NAILED, A COUPLE OF FEET AWAY IS FINE.
2. Remove and clean all of your ground wires and your battery cable ends where they connect to the battery. The engine to chassis ground wire is especially important, as well as the condition of the battery cable ends and the battery posts. They may look good externally but still have hidden corrosion that can cause bad connections and serious voltage fluctuations.
3. Inspect the fuse box for corrosion or loose, burnt fuses. Probably not you problem but could contribute to unreliability.
4. Inspect for old cracked or broken vacuum lines and replace then if they are brittle from age and heat.
My biggest suspicion is the engine to chassis ground, the battery terminals, or bad plug wires. The original wires are numbered to the cylinders and possibly date coded. The huge plug gap would also cause problems with the plug wires if they have no bee recently replaced. If they are cheap wires then consider replacing them, but you do not need to throw parts at the problem and waste money. Might also check the fuel filter, but that usually gives symptoms of stumbling when under high loads. I used to like to take the filter out and blow through it to see what comes out. This way I could warn the customer about his choice of filling stations. If you do not have E10 fuel there you might try some fuel treatment to remove water from your fuel. It can really cause aggravating intermittent problems.
regards
Mech
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