Fuel pump prob.

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Feb 15, 2007 | 07:18 PM

chad1976

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Joined: Dec 2005

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Fuel pump prob.

Hi All, I'm in need of some help bad. On my work truck a 94' F-150 5.8L 4x4 the truck stop running. I've checked many post here and as of now I checked the inertia switch thats ok then the fuel relay it clicks so I think thats ok (But still got a new one to try and it done the same thing) checked the two fusesable link from the sylenoid they seem fine so i changed the fuel pump with no luck (Then tested my old one & it worked) I also tried the trick where you ground the eec test at pin 6 and the relay clicks but the fuel pump does nothing and I"ve read on a few post that that would eliminate the computer being bad but to tell the truth after all I done I wish it was the EEC. I realy need this truck going because its my only means of $$$!! Please someone give me more things to try.Thanks for any info, Chad

Feb 15, 2007 | 07:51 PM

brown 4x4

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Joined: Jan 2001

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From: Nebraska

There's a fuse in the underhood fuse box for the fuel pump. I'm not sure which one it is. Even if it was blown the relay would still click. If that's ok, it looks like you have a wiring or switch (if you have dual tanks) issue. Unplug the fuel pump connector and turn the relay on with the EEC test connector. Work your way forward checking for power on the fuel pump wire at each connector.