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93 blows fuel pump fuse

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Old 06-11-2013, 11:49 PM
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93 blows fuel pump fuse

93 lude orrignally had a h23
h22 jdm engine was swapped in years ago.
h23 harness reused. car began blowing the under dash fuel pump fuse a week ago. this is the upper fuse on the fuse box as it labels 2 fuses as (fuel pump)
would blow the fuse as soon as you put a new one in and key on.
this is the same fuse that powers the main relay imo 15a

so we went with the usual suspect
we unpluged the entire engine harness from the car unplugged the fuel pump power and sending unit harness the ecu and the main relay it self. still blew the fuses immediatly. took a smoke brake came back put in a new fuse and it just began working without blowing fuses.
4 days went by now its back.

has anyone gone through this?
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Old 09-10-2013, 02:35 AM
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Re: 93 blows fuel pump fuse

Did you find out what it was? im having the same problem. the plastic melted on the backup fuse once, everytime i replace the fuse and turn on the switch it blows. got a new main relay too.
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