Fuel pump replacement for a 1967 Mustang - Ford Mustang Forum
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post #1 of 6 (permalink) Old 07-11-2012 Thread Starter
Nedus's Avatar
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Fuel pump replacement for a 1967 Mustang

My fuel pump is making a loud whirring/buzzing noise. I'm assuming it's about to go soon. I'm not too mechanically inclined (yet!), so I'd like to know what a good replacement would be (engine is a 302).
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post #2 of 6 (permalink) Old 07-11-2012
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Fuel pump replacement for a 1967 Mustang

Hello Nedus,
I LIKE you spirit and honesty. It is cool to read that you
don't know a lot YET - -but you for sure will.

I took a quick look at your motor picture and want to offer a
few ideas and thoughts from an OLD guy.

A loud whirring/buzzing noise - is generally NOT something a stock
fuel pump would do. I looked the picture and THINK youmay be running
a mechanical (stock) fuel pump. The fuel pump would be bolted
to the driver side of the motor --just follow the fuel ine back from the
Often when people run a mechanical pump - -they like to mount
them on the inner fender. I HAVE A HUNCH - you may have a mechanical
pump. To answer a question you may have right now - -the mechanical pump
will work GREAT for your motor. If you were to replace the pump
just get STOCK pump from Auto Zone or yur local parts store.

NOW for more important info - - I HAVE a HUNCH itmay NOT BE the fuel
pump BUT it could be the power steering pump or the alternator.
The alternator looks new BUT it still could have an issue.

A real SIMPLE way to narrow this down is to loosen or remove thepower steering
belt and start the motor - - see if the noise is gone. Then if that is OK - try the
alternator belt. You are only going to run the motor for about 30 seconds and you
should know if that is an issue.

BEFORE I did nything I would check the power steering fluid level and give an
inspection to your fan belts.

You MAY have a fuel pump going BUT they usually just leak internally when the diaghram inside goes. Not too much else happens to them.

Cjeck it out and I HOPE I may save you some $$$.

Let us know

Print DAD
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post #3 of 6 (permalink) Old 07-11-2012 Thread Starter
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Location: Hesperia
Posts: 196
I should have clarified, the noise happens when I insert the key, not when I start the engine (although it does continue when I start it up). And I left the key in and got under the car, it sounded like it was coming from what I believe to be the pump (under the gas tank, axle side) which appears to be an aftermarket Holley pump. If that's not the pump and i'm completely wrong...uh...lol? Either way, whatever that thing is, it's making a noise that worries me. I'll try to get a pic of the offending part when I get home later.

Thank you for your reply, very informative!
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post #4 of 6 (permalink) Old 07-11-2012
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Ok, you have an elelctrical pump probably for an EFI motor, not the stock original motor which would have been mechanical and mounted to the drivers side of the engine as PrintDad described.

I have found most all electric fuel pumps vibrate or whirr, etc. it is more evident on add on fuel pumps that weren't mounted originally like yours. You may be able to isolate the mounting surface with some rubber pads, etc. just make sure you use a grounding wire so it works. You may want to start a new thread titled 'how to quiet a loud electric fuel pump' or similar. You'll get more answers from guys running EFI that have dealt with this.

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"If it ain't broke, I haven't fixed it yet" -Jon
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post #5 of 6 (permalink) Old 07-11-2012 Thread Starter
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Location: Hesperia
Posts: 196
Awesome, thanks for letting me know! I took a video so I could better describe the issue. I'll post it in the new thread.

Thanks guys!
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post #6 of 6 (permalink) Old 07-11-2012
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If the pump is mounted solid to the frame the noise it makes will be amplified by the structure of the car. You need to find some rubber mounts and install them. They will have stude on both ends. One end goes thru the frame/structure the pump is mounted to now. Then the pump attaches to the studs on the mounts. It will isolate most of the noise from resonating thru the car.
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