[DML] Re: Louder Fuel Pump Buzzing after Replacing Fuel Hoses at the Fuel Pump -- Sound Deadening Help

["Mike Bosworth" <mike.bosworth@xxxxxxxxxxxxxx>]

Hi

Where my lines touched the back of the access panel there was a 
definate noise transfer... i simply stuck some 'sticky backed' foam 
insulation tape onto the fuel lines at that point to stop this... 10 
min job in all ... no noise now :)

Regards

Mike
#2001
Yorkshire, UK

--- In dmcnews@xxxxxxxxxxxxxxx, Wayne Wagner <dmc-2447@xxxx> wrote:
> Hello Group!
> 
> I just replaced my fuel hoses at the pump this past Monday with the 
> orange hoses with the teflon liner. 
> 
> Overall, I'm happy with the teflon hose product, except... after 
> finishing the job, I noticed that my buzzy fuel pump was sounding 
like a 
> giant mosquito when the sound of the engine is not covering it up.  
It 
> was buzzy before, but now it is definately louder... on the verge 
of 
> being annoying.  Given that the difficulty in bending the hoses 
made 
> things tight in the space, the hoses are definately touching the 
access 
> panel and maybe the bulkhead in that space.  So, I think the buzzy 
sound 
> from the pump is getting transfered more efficiently to the 
bulkhead via 
> the stiffer hoses. 
> 
> I think a little sound dampening is in order (padding the areas of 
the 
> access panels/bulkhead that the new hoses are touching).  Anybody 
have 
> experience in dampening/isolating fuel pump noise?  What's the 
opionion 
> on urethane foam?  I think I can harvest appropriate chunks of it 
from 
> test equipment packaging.  Or is this material too dense and will 
not 
> dampen much sound?  Any other dampening options?
> 
> On the upside, I feel that I am getting improvement in acceleration 
> performance since the fuel hose job.  Before, I used to get some 
degree 
> of power hesitation under heavy accelleration.  Since my type of 
daily 
> driving didn't require me to drive like a maniac, I've learned to 
work 
> around that.  I cannot fully explaine the improvements just yet.  
For 
> now I am speculating that there was partial blockage in the old 
hoses, 
> or some other narrowing of the hose cross section... I haven't 
autopsied 
> the hoses yet to see, but  I know that one of the return line 
fittings 
> had gunk in it like cholesterol buildup in an artery.  All fittings 
are 
> now new except for the supply side.
> 
> Regards,
> Wayne / VIN#2447
> www.AA9DY.com








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