Very strange electrical/fuel issues.

[joff]

Originally Posted by railgun

The FJO box: There's no logic whatsoever to why it would randomly die like that. I'm going to check whether the gound I'm using is good enough. I would seem to think so as I've wound it out several times and it seems fine. Unless I hook up an ammeter to the thing and see if it stops drawing anything, I don't know how else to check the thing.

You can get a pair of Mechanic's Stethoscope for like $5 at Harbor Freight and put it on the injector to listen for the injector pulses. Since you have spark, it seems almost it has to be the FJO or the injectors. Don't know how your ECU fried, but its conceivable it failed in a mode that turned on the injectors to 100% duty cycle and if that happened without fuel pressure it might be prone to overheat the injector coil windings.