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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

fuel pump occasionally continues to run with car off.

  • Thread starter Thread starter just4bob50
  • Start date Start date Aug 23, 2008

just4bob50

Active Member
Apr 2, 2005
504
5
28
Pa.
Aug 23, 2008
#1
  • Aug 23, 2008
  • #1
All right I finally got my 347 in my LX and have about 200 miles on it. Everything is going pretty well with the break in. Over the last 2 days on 2 seperate occasions I turned the car off, and the fuel pump kept running. I then turned the ingnition to full forward with out starting the car, and back to off again and the pump stopped. I was on my way to work, so when I got there I pulled the neg. terminal off the battery just to be safe. when I turned the car off that time the fuel pump shut off, but when I reconnected the battery the pump immediatly started to run. I cycled the ing. again and the pump shut off. When I went to start the car it went through its normal priming cycle and fired right up when started. The car runs and drives fine with good fuel pressure, but Im stumped as to where to even start tracking this problem down. Any help would be great.
 

joel5.0

Member
Jun 15, 2004
429
2
18
Puerto Rico
Aug 23, 2008
#2
  • Aug 23, 2008
  • #2
Faulty FP relay is the most likely cause.
 
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