1991 Isuzu Amigo • 4 cylinder 2WD Automatic • 170,000 miles

I have an 1991 isuzu amigo that is not getting any fuel to the injectors. I spent the last weekend dropping the tank and pulling the fuel pump and testing it. The pump is ok. I also tested the wiring to the pump, it was good. I have changed the ignition switch, installed a new fuel pump relay (it was bad), new fuel filter. I drove it to work yesterday and to the doctors it ran fine. Went out today to go to wark, no gas getting to the injectors. Any ideals?
April 13, 2011.

The problem could be the computer ground driver circuit

Apr 14, 2011.