88' f150 fuel pump runs all the time

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11-08-2006 | 09:13 AM

sideways4m

Thread Starter

Joined: Sep 2005

Posts: 11

88' f150 fuel pump runs all the time

hello,
my f150 88' 302 fuel pump under the floor board in frame rail runs constent. i have to undo the battery when done driving. does anyone have a cure. thanks.

11-08-2006 | 01:29 PM

Hayapower

Super Moderator

Joined: Jul 2006

Posts: 7,489

RE: 88' f150 fuel pump runs all the time

Sounds like the fuel pump relay is sticking closed when powered off.. To verify, try 'taping' lightly on the relay case and it should go off.. Fairly common for this failure..

11-08-2006 | 10:42 PM

sideways4m

Thread Starter

Joined: Sep 2005

Posts: 11

RE: 88' f150 fuel pump runs all the time

do you know were the relay is?
thanks again

11-08-2006 | 10:57 PM

Hayapower

Super Moderator

Joined: Jul 2006

Posts: 7,489

RE: 88' f150 fuel pump runs all the time

Should be close to the air box/left fender inner apron/hinge area.. Should be a weather cover over the relays.. 'Been a while', but I think there are 2.. EEC and fuel relays..