1987 Ford Mustang fuel pump

Tiny
GK3271
  • MEMBER
  • 1987 FORD MUSTANG
  • V8
  • 2WD
  • MANUAL
  • 150,000 MILES
I recently installed a new motor in the car after it sat for about 6 months. When I hooked up the battery the fuel pump started running and would not shut off, causing fuel to leak out the pressure regulator.
the only way it shuts off is by disconnecting the battery or pulling the relay under the seat. Do I need to replace the fuel pump? Will the new one do the same thing?
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Tuesday, December 29th, 2009 AT 8:51 AM

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Tiny
OBXAUTOMEDIC
  • MECHANIC
  • 3,711 POSTS
Hello

Ok, I would say you have 2 problems...

One the Relay is stuck closed causing continuous power to pump.

The other is a bad pressure regulator.

Check link below to test Relay...

https://www.2carpros.com/how_to/how_do_i_check_a_relay.htm

You can also look at the other relays in the car and match the numbers and just swap them out. Just remember which one you swapped.

.
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Tuesday, December 29th, 2009 AT 9:02 AM

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