1988 Ford Laser 1.6 Fuel Injected

[dirty hands]

the fault would be in one of these
faulty sensor-air flow meter/Throttle position sensor/o2 sensor
the injectors
the engine management computer

there should be a diagnostic plug where you might be able to get a diagnostic reading before the fuse blows or
you have to unplug each sensor seperatly
and test and connect each unit until the fuse blows

then you have the answer .you can buy a dick smith or tandy LED tester or a volt meter

a gregories repair manual is helpfull
if you dont have one most libraries can help you there