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Old 03-25-2019, 12:15 PM
WindleStorM WindleStorM is offline
Learning to use the forums
Join Date: Mar 2019
Posts: 1
Default Fuel pump issue.

My fuel pump is constantly running, I replaced the relay and it fixed it for about 4 days and i heard it running again when and got another relay and it didnt help this time its still running. If you have any idea on what could be wrong let me know.
1991 Ford Ranger
4.0L 6 Cylinder.

Last edited by WindleStorM; 03-25-2019 at 01:41 PM.
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Old 03-26-2019, 09:22 AM
Bird76Mojo Bird76Mojo is offline
troll extraordinaire
Join Date: Jun 2009
Posts: 626
Default Re: Fuel pump issue.

I'd be getting a gauge and checking the fuel pressure at the rails. See how long it will hold pressure once turned off.

You could also have a leak at the pump to hanger connection inside the tank.

2001 Edge Regular cab, auto 4.0L 4x4 4.10LS 8.8

1987 standard cab w/92 5.0/T5Z 31 spline 8.8 w/Torsen

1989 Regular cab longbed, manual 2.9 4x4 - Parts BroncoII's x 3
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Old 04-10-2019, 06:44 PM
bjurke bjurke is offline
Ford Tough
Join Date: Jul 2011
Posts: 343
Default Re: Fuel pump issue.

four other possibilities. fuel filter replacement and the fuel pressure regulator located on fuel rail under hood and of course a worn out fuel pump and a plugged sock which covers intake for fuel pump in gas tank. my original ranger 89 had 2 fuel pumps which is a possible issue.
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Old 07-01-2019, 01:11 PM
dvrich dvrich is offline
Ford Ranger Driver
Join Date: Sep 2010
Posts: 2,835
Default Re: Fuel pump issue.

The 4.0L V6 was not available in the 1991 Rangers.
Since the truck must be a several owner DIYer, the problem could be a few different things.
Pete Rose should be in the Hall of Fame!

Last edited by dvrich; 07-02-2019 at 07:30 AM.
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fuel, pump, relay

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