| [GMCnet] Show stopping issue/problem with gasoline fumes [message #125195] |
Mon, 09 May 2011 11:09  |
fbhtxak
Messages: 191
Registered: April 2006
Karma: 0
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Senior Member |
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Emery, Ken,
In my case, the source of the fuel smell is the carburetor
fuel bowl. The smell comes from the cold air feed. Covering
it greatly reduces the problem but is a hassle to
cover/uncover it as it is in a pressurized area (at road
speed) behind the air spoiler.
Until the fuel in the bowl completely vaporizes, the odor
persists. It is especially objectionable when I park the
GMCMh in the garage when the engine is at operating
temperature. The motorhome garage is part of the garage
attached to my home. Unless I vent the garage [with a large
(36") ceiling-mounted vacuum fan], the smell will even
infiltrate the home.
This "smell" issue has only increased as the volatility of
the fuel increases. A local restorer of carbureted collector
vehicles says this is a major complaint of owners of those
vehicles. They often argue that their late model vehicles
don't "stink" (but fail to acknowledge that those vehicles
are either direct or multi-port fuel injected [both
pressurized/sealed]).
Fred Hudspeth
Fred Hudspeth
'78 Royale - Tyler, TX
'82 Airstream Excella 28' Motorhome - Cooper Landing, Alaska
Message: 6
Date: Mon, 09 May 2011 02:43:06 -0600
From: Emery Stora <emerystora@mac.com>
Subject: Re: [GMCnet] Show stopping issue/problem with
gasoline fumes
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Message-ID: <CBDFEC51-3E74-4A02-B708-E304180E0229@mac.com>
Content-Type: text/plain; CHARSET=US-ASCII; format=flowed;
delsp=yes
Also, the seal around the fill spout might be leaking. If
so, when you
fill some gasoline can leak down into the inner wall to the
left of
the driver's seat and when it evaporates it can fill the
cockpit with
fumes.
Emery Stora
On May 8, 2011, at 10:20 PM, Mike Miller <m000035@gmail.com>
wrote:
>
>
> Ken Burton wrote on Sun, 08 May 2011 21:07
>> I'm wondering if you are smelling the gas boiling out of
the carb.
>> This is common on a GMC if you do not have exhaust
crossover in the
>> intake blocked. It does not take much gasoline to
really smell up
>> the place.
>
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| Re: [GMCnet] Show stopping issue/problem with gasoline fumes [message #125202 is a reply to message #125195] |
Mon, 09 May 2011 12:05  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Senior Member |
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| fbhtxak wrote on Mon, 09 May 2011 09:09 |
Emery, Ken,
Until the fuel in the bowl completely vaporizes, the odor
persists. It is especially objectionable when I park the
GMCMh in the garage when the engine is at operating
temperature. The motorhome garage is part of the garage
attached to my home. Unless I vent the garage [with a large
(36") ceiling-mounted vacuum fan], the smell will even
infiltrate the home.
Fred Hudspeth
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Fred,
It sounds like you are not in the mood for fuel injection, so I was wondering if you might switch to an electric fuel pump with no mechanical. The idea here, is that you would turn off the pump and let the coach "run out of gas". The bowl would be mostly empty. Probably a silly idea, but I shut off magneto tractors this way. Less chance of gas evaporating and leaving crud behind.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: [GMCnet] Show stopping issue/problem with gasoline fumes [message #125211 is a reply to message #125195] |
Mon, 09 May 2011 13:36 |
Craig Lechowicz
Messages: 541
Registered: October 2006
Location: Waterford, MI
Karma: 0
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Senior Member |
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George,
That sounds like a shockingly good and simple solution. I've been thinking about electric fuel pumps anyway. Maybe a double throw switch with center off, prime one way, and run, (through oil pressure sender . . .), the other.
Thanks,
Craig Lechowicz
'77 Kingsley, Waterford, MI
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