The most likely explanation is that the control plunger in the fuel distributor
is as seized as the main pump was.
Check by removing the big air hose between the air metering unit and the throttle body. Most likely the hose you just removed
Jumper the pumps to run continuously with ignition on.
You can then manually lift the air metering flap gently (do not force it or you will bend the linkage) with pliers on the center nut, if the injectors then get fuel you brobably have a massive air leak preventing the engine sucking enough air to lift the flap.
One other possibilty is excessive pressure on the control plunger caused by a stuck warm up regulator (not very likely) but you would need a pressure gauge to check.
Also sytem pressure could be too low to open the injectors,(about 4 bar/60 psi from memory) and you cannot really check fuel pressure just by slackening a pipe.
Colin.

Jim,

I, too, bought mine for a "song" as it had quit running and vegetated for 4-5 years. This is my third CIS equipped car (others being 320i and VW Sciroco) and I have twice found it necessary to "tear down" the fuel distributor and clean out the gum and varnish. If yours has been inop for a long period of time then you might need to give it a good flushing.

I just disassemble it, clean out every orifice with Berryman's B-12, clean every part, and reassemble. So far I'm 2 out of 2 for success. The important things are to keep everything squeaky clean, get all the pieces-parts back in their original locations, and don't drop or scratch the plunger/rod.

If you jump the fuel pump relay and raise the air "vane" by hand to you get any fuel to the injectors?

Justin B.
83 Turbo