Nissan D21 Starts and Stalls Immediately

[pastorerik]

Had a problem with the fuel pump fuse blowing intermittently. Needed to move the truck so I put a bigger fuse in until one would hold. It normally takes a 10 amp and I was able to get a 20 amp to hold and not blow. Started right up and ran fine. A few days later I was warming it up and it ran for about 2 hours then it died. I started it and it started right up but stalls after about 5 seconds and will not rev over idle speed. Changed the fuel filter and it still does the same. Trying to sell the truck but hard to sell when it is not running! Z24 with 121K.
I had replaced the fuel pump last year trying to fix a drivabliltiy problem and all went well (though that was not the problem!) When doing that I found a corroded terminal on the fuel tank pump hanger which I resoldered. Drove for months after that with no problem until the fuse started to blow.

Thanks in advance for the help!

[Rev_D21]

Not too wise putting a bigger fuse in place of a smaller one. You could have a fire. The very fact the fuse keeps popping tells me you have a wiring problem between the fuse and the pump. The sending units are known to rot on these trucks so your problem might lie there. It could also be broken somewhere in the harness the runs along the frame. Don't put anymore big fuses in there unless you don't mind making your problems worse by burning up all your wiring.