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Discussing fuel pump relay in the 5.0 Mustangs Forum. fuel pump relay kicks in then 2 to 3 sec later cuts back out, any ...

       

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Old February 9th, 2008, 11:15 AM   #1
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fuel pump relay


fuel pump relay kicks in then 2 to 3 sec later cuts back out, any ideas ?
 

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Old February 9th, 2008, 11:59 AM   #2
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lose ground, lose power, maybe just old?
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Old February 10th, 2008, 12:16 PM   #3
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if your just turning the key on and not starting, that is normal - it's just to get fuel pressure up for starting. The EEC starts the pump back up when it sees the ignition pulses from thje TFI.
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