I'd pop the cover off the realay and check if the contacts are blackened , Id also check the fuel pump relay.

the TDC sensor, at the back of the engine on top of the bellhousing, check if it's cable is all rotted, It shakes a lot and oil eats the insulation. probably a good thing to go ahead and replace if you have not.

normally If you were to unplug the coil and crank the engine you should see the tach bounce each time the TDC sensor sees "once around"

there are approximately 60 or so holes int he flex plate that the TDC sensor looks at, and then a space where there are no holes.

I'd also just open the hood and start checking and cleaning every wire connection you can, look for any green looking contacts. check engine grounds. check the grounds to the fuel rail, look for two (10 mm head )bolts that hold the fuel rail to intake manifold, check those connections out really well. a bad ground will kill the injectors.
check the plug for the AMM.

you can do some wire wiggling with power on, also listen for the buzzing, If you reach a wire that when being wiggled, can change the buzzing or make it stop when you wiggle it, you might be close.

you can use a contact cleaner and and a small , new , wire brush , fine sandpaper, I have a little brush that is glass fibers that I like and when you get each one clean bright and shiny , put a bit of dielectric grease. alcohol and compressed air can help.

check your coil wires and the connections to your coil. see if the little studs look rusty on the coil. there may be an engine bay fuse near there, unplug, spray, re-seat each connector a few times. the ECU and ICU have pretty well protected plugs. You can check them. I bet it's just some bad wiring or a bad ground.

make sure your battery is ok and that the cables and grounds are all clean. a weak battery or bad battery cable or bad ground lug can easily send you off chasing geese so make sure it's not that as one of your first steps.

your alternator should have a ground wire that probably connects to the block maybe somewhere near the water-pump, I'd check and clean that ground to engine. follow the ground from the alternator to where it goes and actually disconnect it , clean it , put it back. If it goes bad your battery won't charge properly.