Fuel Pump Humming
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Freshman User
Joined: Sep 2000
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From: KY
Fuel Pump Humming
I have a 1989 Ford F-150 with a 300-6 4.9L. I have two fuel tanks and when either one is at the 1/4 mark. Almost empty the high pressure fuel pump under the driver side door begins humming and you can feel it on the floor boards. What dose this mean is there a problem with the pumps?
Senior User
Joined: Jun 2000
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Fuel Pump Humming
> Those pumps make some odd
>noises , I find the
>colder it is the noiser
>they are . Any problems
>with your truck or just
>the noise ?
I had this same problem. The problem I had is the fuel pump was on its way to the grave. From what I have found out the type of fuel pump Ford used, on these trucks, makes noise when its about to go out to give you a chance to replacd it before failure.
>noises , I find the
>colder it is the noiser
>they are . Any problems
>with your truck or just
>the noise ?
I had this same problem. The problem I had is the fuel pump was on its way to the grave. From what I have found out the type of fuel pump Ford used, on these trucks, makes noise when its about to go out to give you a chance to replacd it before failure.
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Freshman User
Joined: Sep 2000
Posts: 42
Likes: 0
From: KY
Fuel Pump Humming
I was wondering about the noise because the truck has a miss to it when giveing it gas above 1500 RPMS. It seems the truck is cutting out but after you shift and the RPMs are lower it dosen't miss.So is it my Pumps going out.
Posting Guru
Joined: Feb 2000
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From: Wichita USA
Fuel Pump Humming
Only a pressure test or lab scope of the amp draw and coil windings could tell if the pump is week. My 89 300-six has made this noise when the tanks are low for over 70,000 miles so I tend not to do worry about it. I don't press my luck by running noisy, I fuel asap.
2000 XLT Flare Supercab Sport 5.4-Auto-355LS-Tow pkg-Bedrug-Xtang Tonneau
2000 XLT Flare Supercab Sport 5.4-Auto-355LS-Tow pkg-Bedrug-Xtang Tonneau
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lovinmytruck
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Feb 21, 2010 09:56 AM
