| Fuel lines gone soft and spongy... [message #100329] |
Sun, 19 September 2010 14:04  |
Barry Miller
Messages: 1
Registered: February 2004
Location: Muskegon, Michigan
Karma: 0
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Junior Member |
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The ’77 was just days away from being drivable again after many years; then I smelled raw gas. I quickly found a BIG stain on the parking area which led me to soft, spongy, dripping fuel lines between tanks & selector solenoid. Major setback, I’ll bet there’s no way to avoid dropping the tanks. Tell me it isn’t so; working alone, outside on a gravel surface dropping these tanks is almost too much for this geezer to get his head around. The other catch is I just removed the master cylinder and vacuum booster for replacement. No brakes + No fuel = No move to a better (indoor) spot.
Assuming no words of comfort... I’ve been following the discussion on vapor lock and wonder if this might be another symptom of ethanol in the fuel I recently added prior to engine start. Previously, the coach had been sitting in the same spot for years with no leaks.
If the tanks must come down... Is there any consensus on acceptable configurations for the system (elect. Fuel pump(s), filter(s) etc.) when things go back together? I’ve read and re-read the discussion on vapor lock, am lost in it and wonder if there are drawings of possible configurations. I would very much like to keep this as simple and inexpensive as possible consistent with doing it right. Can I also assume that putting the system back together as original is foolish?
Barry Miller
'77 Palm Beach
Muskegon, Michigan
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| Re: [GMCnet] Fuel lines gone soft and spongy... [message #100330 is a reply to message #100329] |
Sun, 19 September 2010 14:21  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I really believe that Emery Stora has the best solution to the fuel line and
vapor lock issues. The stock system was adequate for fuels not blended with
alcohol. In warmer climates it is not effective with todays fuels. The
system needs to be under pressure from the tank to as close to the carb as
is possible, with fuel injection preferable to carbs. Emery is giving a tech
presentation at Du Quoin, and he promised to have data available to those of
us who cannot attend. For what it's worth.
Jim Hupy
Salem, Or
78 Royale 403
On Sun, Sep 19, 2010 at 12:04 PM, Barry Miller <bmmiller@gte.net> wrote:
>
>
> The ’77 was just days away from being drivable again after many
> years; then I smelled raw gas. I quickly found a BIG stain on the parking
> area which led me to soft, spongy, dripping fuel lines between tanks &
> selector solenoid. Major setback, I’ll bet there’s no way to
> avoid dropping the tanks. Tell me it isn’t so; working alone, outside
> on a gravel surface dropping these tanks is almost too much for this geezer
> to get his head around. The other catch is I just removed the master
> cylinder and vacuum booster for replacement. No brakes + No fuel = No move
> to a better (indoor) spot.
> Assuming no words of comfort... I’ve been following the discussion
> on vapor lock and wonder if this might be another symptom of ethanol in the
> fuel I recently added prior to engine start. Previously, the coach had been
> sitting in the same spot for years with no leaks.
> If the tanks must come down... Is there any consensus on acceptable
> configurations for the system (elect. Fuel pump(s), filter(s) etc.) when
> things go back together? I’ve read and re-read the discussion on
> vapor lock, am lost in it and wonder if there are drawings of possible
> configurations. I would very much like to keep this as simple and
> inexpensive as possible consistent with doing it right. Can I also assume
> that putting the system back together as original is foolish?
>
> --
> Barry Miller
> '77 Palm Beach
> Muskegon, Michigan
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Fuel lines gone soft and spongy... [message #100351 is a reply to message #100329] |
Sun, 19 September 2010 16:17 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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-----Original Message-----
From: Barry Miller <bmmiller@gte.net>
To: gmclist@temp.gmcnet.org
Sent: Sun, Sep 19, 2010 2:04 pm
Subject: [GMCnet] Fuel lines gone soft and spongy...
trimmed..
.
I would
very much like to keep this as simple and inexpensive as possible consistent
with doing it right. Can I also assume that putting the system back together as
original is foolish?
--
Barry Miller
'77 Palm Beach
Muskegon, Michigan
_______________________________________________
Barry,
I would not consider putting the fuel tank system back together as original as foolish...
That is what I would do if I needed to drop my tanks in the near future. I would add a fuel filter in-line after the selector valve -- but I would even still keep the carb filter. And I might paint the bottoms of the tanks a lighter color -- silver or white.
If when I used the coach I experienced issues -- such as vapor lock -- then I would make some remedies, first the Jim Bounds method, add a small in-line electric pump powered by/through the tankselector switch.
My expected usage on the GMC may not be the same as yours or others.
Dennis
Dennis Sexton
73 GMC
Germantown, TN
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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