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Discussion Starter · #1 ·
My trooper just quit the other day like it ran out of gas.
I can jump the fuel pump relay and make it work but not when the key is turned on.
I've checked the fuses and relays and all seems to be fine. I've also replaced the ECM .Is there a logical sequence of steps and points of voltages to take to troubleshoot this probelm.
thx
Harry
 

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Check the power connections under the truck on the right side buy the gas tank mine was bad I cut that damn plug out and hard wired it. Also make shure ya have a good ground back thair on the tank
 

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Discussion Starter · #4 ·
Thx for the reply's. It turned out to be the fuel pump after all. Weird I could make it come on manually but not when turning the key. I stopped by the Isuzu shop and the the guy suggested I check the fule pressure. I had none so I replaced the pump and now everything is fine including me. :D
Harry
 
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