[ROVERNET - UK] Fuel Pump woes

[geffandjulie]

No idea what brand, but it looks like the cylindrical one on the web site of 
the previous email.  No I didn't look at the local 2000; my 3500 is idled by 
a fried master cylinder.......
----- Original Message ----- 
From: "Slatskars" <slatskars at comcast.net>
To: <rovernet at lyris.ccdata.com>
Sent: Tuesday, August 02, 2005 11:06 PM
Subject: Re: [ROVERNET - UK] Fuel Pump woes


> Geff,
>
> What brand of pump is it?
>
> Did you check out that 68 2000TC?
>
> Slats
> ----- Original Message ----- 
> From: "geffandjulie" <geffandjulie at comcast.net>
> To: <rovernet at lyris.ccdata.com>; <lacpsyd at earthlink.net>
> Sent: Tuesday, August 02, 2005 10:21 PM
> Subject: Re: [ROVERNET - UK] Fuel Pump woes
>
>
>> US 3500S all have an electric pump mounted alongside the fuel tank, 
>> covered by a foam insulator.  The mechanical pump is not there and is 
>> blanked out by a triangular plate.  The reason is said to be fuel 
>> starvation from boiling in the lines in hot temperatures. The mechanical 
>> pump could not overcome it. The hood louvers were added simultaneously 
>> for the same reason. Racy...but really to keep it turning over in summer.
>> ----- Original Message ----- 
>> From: "S Manwell" <smanwell at sprintmail.com>
>> To: <lacpsyd at earthlink.net>; <rovernet at lyris.ccdata.com>
>> Sent: Tuesday, August 02, 2005 4:14 AM
>> Subject: Re: [ROVERNET - UK] Fuel Pump woes
>>
>>
>>> Lance,
>>>
>>> I'm not too familiar with 3500S specifics, but I think the Federal 3500S 
>>> may have had a US-made Facet electric fuel pump.  I think you might be 
>>> able to get the same pump at a NAPA autoparts store or similar.  Also, I 
>>> wonder if there is any restriction in the straw that the pump is sucking 
>>> from...
>>>
>>> --Steve
>>>
>>> Lance La Certe wrote:
>>>
>>>>Hi Gang,
>>>>
>>>>Need help with fuel pump and discovered some info that may be helpful to
>>>>others on the list.
>>>>
>>>>1) 1970 3500S ----I'm in need of a new fuel pump.  Any suggestions for a
>>>>state-side source (I will be contacting Ruth Burgess in Canada)
>>>>
>>>>2) I need to know if anyone can give me the specs on the OEM fuel
>>>>pump----specifically what are the upper and lower pressure limits (e.g.,
>>>>2.5 psi to 4.5 psi, etc).
>>>>
>>>>3) For several months I have struggled with the car not being able to 
>>>>idle
>>>>once the engine was at normal operating temperatures (especially in the
>>>>summer when it has become especially hot).  After many helpful 
>>>>suggestions
>>>>from the listers (e.g. blow out the return fuel lines; check the
>>>>circulating coolant line which runs directly into the intake manifold;
>>>>check your timing, etc)-----I discovered that when cold and just 
>>>>starting
>>>>that my fuel pump was putting out only about 3 psi-----this was adequate 
>>>>to
>>>>keep things running smoothly, but after several minutes of running, as 
>>>>the
>>>>fuel pump becomes warm it actually becomes less efficient (apparently 
>>>>most
>>>>all fuel pumps operate this way----hence the listed range on the specs). 
>>>>As it turns out, when warm (and this has nothing to do with the engine
>>>>temperature, but the pump temperature), it was only putting out 1 psi. 
>>>>At
>>>>this pressure there is not enough flow into the carb bowls to overcome 
>>>>the
>>>>tendency for the gas to vaporize, especially when the engine is 
>>>>warm/hot. With a properly operating pump which is keeping the pressure 
>>>>up, it should
>>>>overcome the tendency to vaporize and allow the engine to continue to 
>>>>idle.
>>>>
>>>>
>>>>4) My mechanic is suggesting that I find a pump that will put out about 
>>>>7
>>>>psi when cold, so that when it heats up it will still be putting out 
>>>>about
>>>>3 psi to overcome the vaporizing problems.
>>>>
>>>>Any help with this would be appreciated.
>>>>
>>>>Lance La Certe,  Denver, CO
>>>>
>>>>
>>>>Lance La Certe
>>>>lacpsyd at earthlink.net
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>
>>>
>>>
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>>
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>
>
>
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