I have the fuel pressure hardware, so it is off to test pressures today. Thanks so much for all of the help.
I er, ahem seem to have found a plug end. Here is a photo. I cannot identify it, but it might be important. It is on the engine wiring harness.
I know that I have plugged in: WUR, TPS, lambda valve, cold start valve, aux air, air plate switch. There are several red/white and ground wire possibilities on the wiring diagram...
THanks.