5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Fuel Pump..........

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Old 08-29-2007, 07:55 PM
  #1  
ncplaya88
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Default Fuel Pump..........

Well I guess I'am just going to get a fuel pump. It just doesnt make any sense. 12.4 volts into the fuel pump relay and 6.1 out....(replaced relay).......Maybe a short to ground or something or the fuel pumps burnt up and causing a drain, I dunno. I dont hear the pump kick on, was driving the car and it just died. I attached a diagram with my voltage readings on them. Thanks for any help or ideas. (1992 Mustang GT)

[IMG]local://upfiles/53284/4BF371A776B74A3BB8383C976CEB204C.jpg[/IMG]

[IMG]local://upfiles/53284/63CC74112801490EAABDAC6473A6F887.jpg[/IMG]
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Old 08-29-2007, 07:57 PM
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mattdel
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Default RE: Fuel Pump..........

bad ground
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Old 08-29-2007, 07:59 PM
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ncplaya88
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Default RE: Fuel Pump..........

Now that I think about it.........Could it be the PCM? Since it grounds the relay? There is a slight clicking noise coming from somewheres in the PCM's area........I dunno just putting some ideas out
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Old 08-29-2007, 08:11 PM
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ncplaya88
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Default RE: Fuel Pump..........

Where would I found the ground to check it?
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Old 08-29-2007, 08:14 PM
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mattdel
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Default RE: Fuel Pump..........

terminal # 86 on the relay is ground
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Old 08-29-2007, 08:42 PM
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ncplaya88
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Default RE: Fuel Pump..........

now if that shows to be a bad ground..........then what? pcm?
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Old 08-29-2007, 08:43 PM
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94StinkinLincoln
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Default RE: Fuel Pump..........

if its not the wires, i have my stock pump, the sock filter on it is brown so im sure its got some miles on it. u can have it just pay shipping.
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Old 08-30-2007, 06:51 PM
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ncplaya88
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Default RE: Fuel Pump..........

Where does the pump ground out at? Any other ideas?
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Old 08-30-2007, 09:32 PM
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ddeaton66
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Default RE: Fuel Pump..........

bypass the relay for a check, relays do go bad.
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