WJ fuel pump Howl…. - JeepForum.com
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post #1 of 4 Old 10-16-2021, 08:27 PM Thread Starter
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WJ fuel pump Howl….

WJ enthusiasts,
Just replaced my failed electric fuel pump with a new one and I have a constant howl coming from the pump ( just loud enough to keep a gear head from thinking). Has anyone had this same issue? Any fixes?

I appreciate any feed back


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post #2 of 4 Old 10-16-2021, 10:34 PM
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That's just the hum of the pump. Was it a bosche unit? I hear many of the cheaper ones are loud af
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post #3 of 4 Old 10-17-2021, 03:50 AM
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Did you replace the filter too? Get under there and put your hand on the filter. I have a. 04 4.0. I got a mopar filter due to a long crank as the check valve in the filter failed and it made a horrendous howl immediately after replacement. It superseded to a new part number, which was much cheaper, I wonder why. I warrantied it twice and had the same howl. It got quieter the more throttle I gave it. I assume it’s the pressure regulator in the filter. I tried all kinds of things like securing to the bracket with hose clamps, wrapping it with foam and butyl tape, nothing worked. I worked at the dealer and decided to get with tech support as if it were a customers car and they basically said yea we have been having a rash of these have a nice day. Thanks guys that are supposed to help us figure out problems. I guess it’s too old of a vehicle and not enough filters are being sold for them to remedy this issue. I tried finding a new filter with the old original part number but no luck. Finally I got a duralast and it was quieter and seemed to have gone away as it wore in over the past 5 years, but I still hear it from time to time. Never touching the filter again. And 5 years later I see that it’s still the same part number.
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post #4 of 4 Old 10-25-2021, 08:41 PM
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I worked at the dealer and decided to get with tech support as if it were a customers car and they basically said yea we have been having a rash of these have a nice day.
Standard. lol.

1999 WJ Limted - Ex Soccer Mom ride turned Rule 25 Compliant Bike Hauler
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