return line to gas tank

[Dave Balfour]

ya it may heat the fuel i wont argue that but i mentioned that it was
to cool and lubricate the pump. dave
-----Original Message-----
From: mrvette <>
To: diy_efi at efi332.eng.ohio-state.edu <>
Date: Monday, October 19, 1998 5:36 PM
Subject: Re: return line to gas tank


>Nah, I can attest with my'72 vette that the reutren line on a full
tank of gas
>tends to heat up the gas, and expand the tank, forcing a leak
conditon....when
>the tank is somewhat enptied,  the fumes disappear....
>believe me I have monitored this condition VERY carefully over the 3
years this
>mod with DPFI has been in effect, and tried all sorts of
thigs....it's not
>really a leak, just escaping fumes...a real pain in the ass....you
know the cold
>gas goes through the warming of the FI rails on the engine, and goes
back heated
>to the tank,  gradually it all heats up, and forces gasses to
escape,,.....the
>old type of evap canister, allthough operationg correctly is not up
to the job,
>hence the late model FI cars have a bunch of capillary tubes in the
system...
>a real weird piece of engineering, of which I have no knowledge....
>anyone out there who knows of these things....?
>
>GENE
>
>Dave Balfour wrote:
>>
>> I was under the impression that the return line is there to insure
>> that.there is movement of fuel to help lubricate and cool the
in_tank
>> pump. dave balfour
>> -----Original Message-----
>> From: mrvette <mrvette at bellsouth.net>
>> To: diy_efi at efi332.eng.ohio-state.edu
>> <diy_efi at efi332.eng.ohio-state.edu>
>> Date: Monday, October 19, 1998 3:47 PM