Thanks for responding guys.
N6: Yes, I'm getting spark from the coil wire, not just the coil itself (the whole spark plug set is new). I tried different caps and rotors.
markmitch: I agree. I've had "new' parts fail on me too, that's why I tried several different combinations to isolate the problem.
I'm starting to think that the ecm went out, because every time I pulled a code within the last year, I have changed the part: crankshaft sensor, camshaft sensor, distributor pickup, distributor, cap, rotor, spark plugs, spark plug wires, coil, coolant temp sensor, air mass sensor. Also changed water pump, timing chain, radiator, fuel filter and other minor stuff. I don't know if it means anything, but whenever I use the turn signals, the fuel gauge hand would "twitch" in time with the signal! I sure wish there was a way to test the ECM. Everyone I asked around here says: no.
I would hate to spend another $200 on a rebuilt ECM, if it doesn't help. Over the last year I have spent a ton of money, but don't have the heart to give up on her. Hope you guys understand my reluctance to keep throwing money at her. At some point, you gotta either fish or cut bait. I getting really close to cutting my losses and parting her out if I can't fix this problem.