Got an Autozone nearby? They will loan you a noid light set and fuel pressure test kit at no charge.

 

Pulled the PCM connector and verified that I have an open between pin 100 on the PCM (injector 4 control) and the injector #4 connector. (Guessing at connector pinout and wiring diagrams, based on what little I can find for a 1997. My 1998 doesn't match exactly, but I'm going by wire colors)

Does anyone happen to know which of the two big harness connectors on the firewall the injector wires run through? (pin numbers would be even better).