The first time, the EGR valve was replaced. Sure, even new EGR valves can be bad, I just don't understand why the EGR valve itself could blow the injdctor fuse. I understand about the solenoid.
The EGR valve didn't blow the fuse. They're throwing parts at it.
Whatever is blowing the injector fuse (the solenoid was maybe a good "guess" - although apparently wrong) is the root cause.
The blown fuse is the cause of the "reduced power" complaint, as well as the check engine light, since it also kills the EGR solenoid.
I can't say that I've ever seen a shorted injector, but that would be my next approach.
Individually, they measure about 10-16 ohms (ballpark). I would be inclined to remove the upper intake, and unplug all the injector connectors. Measure each one individually, with an ohm-meter. If one or more of them reads a markedly different resistance, it's probably the culprit.
It's only blowing the fuse when the throttle is "exercised" because more fuel requires a longer duty cycle ("on" time) to the injector. Thus a higher average current drain.
Three injectors and the EGR solenoid are ALL that are on that fuse.
Edit - There should be a flat connector (on some 88s, it might be sort of square) that connects the injector harness to the rest of the engine harness. It will usually lay somewhere near the thermostat housing.
It might be worthwhile to unplug that harness, and make sure there is no corrosion bridging any of the pins together. Not likely, however.
