How can you tell if the fuel pump on a 1994 Isuzu Amigo is bad?

Answer 1

In my experience, I had a 1995 Isuzu trooper with a bad fuel pump. Or so I thought, it was actually the wires going to the pump that separated. Try this, before dropping the tank; first rermove the air in let goin to the throttle and spray carb cleaner in there, start the engine, if it starts for a couple of seconds your pump is bad. Als0o remove the fuel cap put your ear close by and have someone put the ingition in the on position. You should hear a whizzing sound which would be your fuel pump. No whizzing??? Bad pump. Whoops forgot to mention make sure the fuel pump relay is good before doing anything first.

That's a good trick but not necessarily indicative of a bad fuel pump. My 89 Trooper also fired up briefly with starter fluid sprayed into the air inlet, but turns out the fuel pump did work, which I was able to establish by jumping two terminal slots where the fuel pump relay goes. You need a wiring diagram to figure out which two slots of the five to jump.

your car won't start. at least that is what happened to me in my truck (with a full tank of g