Noisy fuel pump - The 1947 - Present Chevrolet & GMC Truck Message Board Network

munter77 · 06-11-2022, 08:36 PM

Any advice on an easy way to reduce the noise of an external fuel pump? Not thinking I should insulate it or it will get too hot.

**truckster** · 06-11-2022, 11:42 PM

Rubber isolators can help reduce the noise quite a bit.

hemi43 · 06-12-2022, 08:47 AM

Put it in the tank.

zammer · 06-13-2022, 04:08 PM

One reason your pump may be noisier then needed/designed is the suction fuel line may be too small and/or if your filter is too restrictive so it is cavitating. I had this issue with my self learning EFI fuel pump provided setup with the kit with an external fuel pump and it was mounted on the lowest point of my 2wd blazer frame which was level with the bottom of my fuel tank so it should have naturally had net positive suction head even with a low fuel level (with dip tube). I went from a 3/8 to 1/2 inch suction hose and a larger diameter filter to act as a reservoir. That with a higher micron filter to increase suction flow and the fuel pump you cannot hear anymore at all. The pump is mounted with a rubber clamp to the frame before and after the suction setup improvement btw. hope this helps troubleshoot the noise out a bit

munter77 · 06-13-2022, 04:17 PM

Quote:

Originally Posted by zammer

One reason your pump may be noisier then needed/designed is the suction fuel line may be too small and/or if your filter is too restrictive so it is cavitating. I had this issue with my self learning EFI fuel pump provided setup with the kit with an external fuel pump and it was mounted on the lowest point of my 2wd blazer frame which was level with the bottom of my fuel tank so it should have naturally had net positive suction head even with a low fuel level (with dip tube). I went from a 3/8 to 1/2 inch suction hose and a larger diameter filter to act as a reservoir. That with a higher micron filter to increase suction flow and the fuel pump you cannot hear anymore at all. The pump is mounted with a rubber clamp to the frame before and after the suction setup improvement btw. hope this helps troubleshoot the noise out a bit

Posted via Mobile Device

Thanks a lot for the insight. I will take a look at line sizing and my filter.

zammer · 06-13-2022, 04:47 PM

You are welcome let us know how it comes out, good luck

zammer · 06-05-2023, 05:55 PM

Hey Munter77 how did you make out with your fuel pump issue?
Hopefully it was resolved, if so what did you find?

06-11-2022, 08:36 PM	#1
munter77 Registered User Join Date: May 2022 Location: Andover, MN Posts: 15	Noisy fuel pump Any advice on an easy way to reduce the noise of an external fuel pump? Not thinking I should insulate it or it will get too hot.

06-11-2022, 11:42 PM	#2
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,976	Re: Noisy fuel pump Rubber isolators can help reduce the noise quite a bit. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson

06-12-2022, 08:47 AM	#3
hemi43 Registered User Join Date: Mar 2015 Location: Ontario Canada Posts: 1,526	Re: Noisy fuel pump Put it in the tank.

06-13-2022, 04:08 PM	#4
zammer Addicted user Join Date: Sep 2009 Location: Edmonton, Alberta Posts: 370	Re: Noisy fuel pump One reason your pump may be noisier then needed/designed is the suction fuel line may be too small and/or if your filter is too restrictive so it is cavitating. I had this issue with my self learning EFI fuel pump provided setup with the kit with an external fuel pump and it was mounted on the lowest point of my 2wd blazer frame which was level with the bottom of my fuel tank so it should have naturally had net positive suction head even with a low fuel level (with dip tube). I went from a 3/8 to 1/2 inch suction hose and a larger diameter filter to act as a reservoir. That with a higher micron filter to increase suction flow and the fuel pump you cannot hear anymore at all. The pump is mounted with a rubber clamp to the frame before and after the suction setup improvement btw. hope this helps troubleshoot the noise out a bit __________________ 1972 2wd Blazer - 95% completed 2015 Silverado 1500 4wd -z 2008 AERO 9-7X (TBSS cousin) LS2 1970 Jimmy 4wd - future project

06-13-2022, 04:47 PM	#6
zammer Addicted user Join Date: Sep 2009 Location: Edmonton, Alberta Posts: 370	Re: Noisy fuel pump You are welcome let us know how it comes out, good luck __________________ 1972 2wd Blazer - 95% completed 2015 Silverado 1500 4wd -z 2008 AERO 9-7X (TBSS cousin) LS2 1970 Jimmy 4wd - future project

06-05-2023, 05:55 PM	#7
zammer Addicted user Join Date: Sep 2009 Location: Edmonton, Alberta Posts: 370	Re: Noisy fuel pump Hey Munter77 how did you make out with your fuel pump issue? Hopefully it was resolved, if so what did you find? __________________ 1972 2wd Blazer - 95% completed 2015 Silverado 1500 4wd -z 2008 AERO 9-7X (TBSS cousin) LS2 1970 Jimmy 4wd - future project



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