no fuel pump noise.....
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Junior User
Joined: Dec 2010
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no fuel pump noise.....
my truck wouldnt start the other day because all of the sudden the fuel pump wouldnt pump any fuel. no hum coming from back there, so i bought a pump, and right when i started to drop the tank the pump started to work again! so i said screw it, put everything back togather and returned the fuel pump. now the problem is back 3 days later... i think it might be a bad ground wire because of the intermitten connection.. but i have know idea what i am looking at.. what should i do?
Junior User
Joined: Sep 2011
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Replace the pump. sometimes messing with it or jaring it will cause it to kick in. My front pump went out a few months after I installed new tanks "with over half a tank of gas of course!!". So I reached up between the frame and bed and smacked it a few times and it kicked in. Immediately drove it till empty switched to rear tank to get home and took it out and replaced the pump.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
Make sure you are getting consistent power to the pump(s) before you start dropping any tanks. You could have a bad relay, fuse link, dash tank selector switch or wiring problem.
Use this diagram for reference:
courtesy of oldfuelinjection.com
That was for a 1991, it should be the same or very similar to your 1990.
Use this diagram for reference:
courtesy of oldfuelinjection.com
That was for a 1991, it should be the same or very similar to your 1990.
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
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Junior User
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Well I finished dropping the tank last night and on my lunch break im gonna test the pump on a battery and hopefully it will not run so I can have this problem resolved.
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