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 Relay

Old 05-18-2007, 06:56 AM
  #1  
phorr20
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Default Fuel Pump Relay

Anybody have problems with the fuel pump relay or the electrical?

There will be days that the fuel pump won’t turn on when I turn the key/ignition on.

I’m not sure why, but it seems to do it when it's cold outside. I’ll come back the next day and it fires right up.
I have changed out the fuel pump relay already.


Thanks
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Old 05-18-2007, 10:40 AM
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tmajikman
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Default RE: Fuel Pump Relay

check the ground wires and also make sure that you dont have any corrosion on your connections.
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Old 05-20-2007, 02:36 AM
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jrhaden
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Default RE: Fuel Pump Relay

I just got that problem solved today.88-91 relay under the seat 92 and up it is behind the kick panel on the passenger side and there is one under the hood by the MAF. Make sure you check youre fuse and inertia switch also.
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Old 05-20-2007, 02:36 AM
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jrhaden
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Default RE: Fuel Pump Relay

Mine was doing the same thing and it was the relay under the hood.
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