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Neal
Neal, Mechanic
Category: Car
Satisfied Customers: 8351
Experience:  Auto repair pro and Mechanic on multiple makes.
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1995 isuzu: electrical fuei system..relay..swich in side of the cab

Resolved Question:

1995 isuzu electrical fuei system the fuel pump works the relay is good the fuse is good but still can not get fuel to the motor. can i make the fuel pump work off a swich in side of the cab
Submitted: 5 years ago.
Category: Car
Expert:  Neal replied 5 years ago.

I'm Neal and I am here to assist you. Only accept when you are happy with my assistance. If I can't help I will open your Question to other experts.

 

So the fuel pump is running? What is the fuel pressure?

Customer: replied 5 years ago.
Don't know the pressure cannot get the pump to run inside the gas tank. cut out the connector and wired it direct thinking it was a faulty connector. the fuse is good and the relay is good.
Expert:  Neal replied 5 years ago.
So even with the new pump wired directly, it is not working?
Customer: replied 5 years ago.
the fuel pump works directly off the battery, can i hook it up directly with a toggle switch? does not work when i put it in the gas tank with the original wiring?
Expert:  Neal replied 5 years ago.
It could be that the ecm is not commanding the pump on, have you ruled that out?
Customer: replied 5 years ago.
where is the ecm located?
Expert:  Neal replied 5 years ago.
Is this a Rodeo or Trooper?
Customer: replied 5 years ago.
1995 v6 rodeo
Expert:  Neal replied 5 years ago.
It is behind the driverside pillar panel.
Customer: replied 5 years ago.
what is a pillar panel is this on the inside of the cab by the window sheild on the drive side
Expert:  Neal replied 5 years ago.
I'm sorry, that was misleading, the panel down by your feet.
Customer: replied 5 years ago.
this is not the fuse box right. you are talking about the side panel down by your feet?
Expert:  Neal replied 5 years ago.

Yes, behind the panel.

Customer: replied 5 years ago.
neal is this a coastly item and can i by this part at the auto store
Expert:  Neal replied 5 years ago.
They are about $300 from the local parts store.
Customer: replied 5 years ago.

neal is there anyway to check this unit out befor give up $300

Expert:  Neal replied 5 years ago.
No, all you can do is rule out other problems and naroow it down to the computer. I do see these fail pretty often as they are aging.
Customer: replied 5 years ago.
neal this problem started as intermtintint problem it would start run for week then stop then it would run for a week then stop now it will not start at all do e.c.m go like that
Expert:  Neal replied 5 years ago.
It can, you can try a bump test, literally bump it with your hand and see if you can see any kind of change in how it acts.
Customer: replied 5 years ago.
took side panel off bumped it with my hand still no start. there is a wire hanging with a white clip should it be plugged in anywhere?
Expert:  Neal replied 5 years ago.

That is likely just an unused connector. I cannot say offhand. The bump test is worth a try but not a sure thing.

 

If you have ruled out other causes, the problem comes down to the ecm.

 

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