1991 NA 2+2 no start

[buloushie]

Was working on the car last night, had it running while I cleaned the inside to put drivers side seat back in.I don't driver the car much not my DD so when ever I work on it I let it run.well went out today to put the seat in car wouldn't start.it cranks but doesn't turn over. So I checked the fuel pump relay by the drivers kick panel it clicks like it should. Then checked the fuse by the battery it's good, checked the cas took it out and turned it bY hand could hear each injector click so they are good. Next had a friend listen for the pump back behind the rear seat and no noise at all.
Then did the jumper wire on the FPCU. Still no start so it's the fuel pump right? Are is there anything else i need to check before I replace the fuel pump?

[nissanfreak12]

Computer for codes.

[t.mcginley.jr]

Check the ecu like nissanfreak said first

But the fuel pump should make a small electric whine noise for a few seconds when you turn to key to "on". This is the fuel pump priming, filling the lines with fuel so the injectors can fire immediately on start. If there was no noise it's most likely the pump.

[buloushie]

Got codes 21 and 34