Very embarassing episode (as in having to have my 1993 Metro towed because it started, ran rough, and died). Cranked, but fuel pump was silent, so I thought it was a re-run of my engine work when I had failed to reconnect the dedicated ground for the ECU sensors at the back of the TB. I pulled the ECU but finally got home to get my manual and realized the ECU is not at fault for the FI relay getting no +12. Wiggling the IG fuse (I should have realized there was no ignition power when the idiot lights failed to come on -- duh!) allowed the pump to run.
I took the fuse panel apart to troubleshoot it.
The IG fuse is 20amp, it takes a lot of power. Over time, it had overheated its socket, which expanded to make an intermittent.
I tried bending the contact back closed but of course this failed. The only fix was to bend the ear of the fuse so it is sure to be snug in the expanded socket. I could have saved myself a lot of trouble if I had just tested the IG fuse socket with the blade of half a dead fuse.