X2, yep some do STB, & I keep coming back to what the op said about not hearing the fuel pump when he turned the key back on. Also pumps from that vintage suffer from heat stroke lol.
Rock, I don't know where you live & what your climate is right now, but was it hot the day this happened? The FIs return unused (non injected) fuel to the tank in a never ending continuous loop & all the fuel that's returned has been preheated by engine heat. Too much heat & it will kill the pump, & the fact that you said that a half hour later it fired right up tells me this might be the problem (half hour later the fuel & the pump have cooled down enough to run again) Check your ground like STB said & if it's in order, I would suspect a tired pump that is suffering from high electrical resistance due to heat. One thing you can do to test this is to always keep your fuel tank as full as possible because it has more cold mass to counteract the pre-heated fuel that is returning, & will keep the pump cooler.
Rock, I don't know where you live & what your climate is right now, but was it hot the day this happened? The FIs return unused (non injected) fuel to the tank in a never ending continuous loop & all the fuel that's returned has been preheated by engine heat. Too much heat & it will kill the pump, & the fact that you said that a half hour later it fired right up tells me this might be the problem (half hour later the fuel & the pump have cooled down enough to run again) Check your ground like STB said & if it's in order, I would suspect a tired pump that is suffering from high electrical resistance due to heat. One thing you can do to test this is to always keep your fuel tank as full as possible because it has more cold mass to counteract the pre-heated fuel that is returning, & will keep the pump cooler.
They ran on 12 psi & never vapor locked, but the injectors did seem to to leak a little when they were sitting & would cause the engine to act flooded when restarting.
