Re: EFI fuel pump fuse ?
I think the EEC relay has an internal diode, or at least it should. This would explain why an EEC relay is more expensive than a fp relay, because, at least on my '90, these two relays are otherwise identical and can be exchanged to get you off the trail if you only carry one spare. The plastic housings are keyed differently but this is easily fixed w/a pair of dykes.
I also thought about killing the EEC power as a theft deterrent, but I'm not sure it's a good idea because you'd be wiping out the memory each time?