Actually, the EEC relay on this model is the other relay next to the fuel pump relay on the pass. side fender well. I went back through my papers and discovered it. That's all good, been checked many times including again this morning.
Things I've done;
1) Replaced the fuel filter
2)Replaced the ECM (mounted to the outside of the distributor)
3)Replaced the magnetic pick-up coil (inside the bottom of the distributor)
4)Replaced the Air Idle Control (mounted on the intake manifold just in front of the throttle body)
5)Replaced the MAP sensor
6)Checked the relay circuits (all good)
I discovered, by pulling fuel lines and checking flow, that the high pressure fuel pump sometimes works, sometimes doesn't. I'll get a real good flow for several tests, then nothing, even though there is power to it.
Can the high pressure pump, on its own, work intermittently?
Is there some other reason, other than the relay, that would intermittently prevent it from working? The relay is good. I check it every time I try something new. Not knowing the nature of the pump itself, I am unsure how to proceed. Most electric pumps I've worked with over the years will either work or not work, nothing in between.