| Ever loose your gas cap? [message #207222] |
Thu, 09 May 2013 08:07  |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
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I noticed in Ken Henderson's blog that he had left his gas cap at a gas station. After nearly doing the same thing on our first trip. I put a strong magnet on the gas door. It's steel so the magnet sticks. Now I just place the gas cap on the magnet while refueling. It won't fall off and The door won't close until it's replaced.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
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| Re: [GMCnet] Ever loose your gas cap? [message #207312 is a reply to message #207308] |
Fri, 10 May 2013 09:30  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Went and looked at my gas cap. It does not have a identification number on it. I bought the one that I have because it has a turned up handle on it, making it much easier to remove and replace. I also attached a magnet assembly from an old hard drive.
I stick the gas cap to the gas cap door while filling the tanks. I had left a gas cap somewhere on our trips.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Ever loose your gas cap? [message #207319 is a reply to message #207305] |
Fri, 10 May 2013 10:08 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Matt,
When you remove the gas cap and there is a burst of pressure there is something wrong with the vapor valve, canister, and / or
lines?
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Matt Colie
Terry,
It is supposed to be non-vented.
If you want to remove the vapor valve and canisters, then you need to find a vented cap.
Matt
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Ever loose your gas cap? [message #207343 is a reply to message #207319] |
Fri, 10 May 2013 18:04 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Robert Mueller wrote on Fri, 10 May 2013 11:08 |
Matt,
When you remove the gas cap and there is a burst of pressure there is something wrong with the vapor valve, canister, and / or
lines?
Regards,
Rob M.
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Rob,
As I understand the operation of the system, there should be little or no pressure in the tanks at any time.
Problem: Little pressure is often listed as 3~6" of water column. In the volume and pressure compliance of the coach fuel tanks, this could be appear to be a large volume. It still should never blow out wet fuel.
If it seems more than that, my guess would be that either the vapor separator is jammed (unlikely but possible), vapor vent lines have become plugged up or carbon canisters are plugged as a result of too much fuel going to them.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] Ever loose your gas cap? [message #207355 is a reply to message #207343] |
Fri, 10 May 2013 20:20 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Matt,
Thanks!
I forgot that a large flow volume would make it seem like A LOT of pressure when it wasn't.
I think you have answered why I get the POOF when I take the fuel cap off. I have filled the carbon canister with fuel on a number
of occasions since I've had Double Trouble.
New question do they ever dry out?
Regards,
Rob M.
-----Original Message-----
From: Matt Colie
Rob,
As I understand the operation of the system, there should be little or no pressure in the tanks at any time.
Problem: Little pressure is often listed as 3~6" of water column. In the volume and pressure compliance of the coach fuel tanks,
this could be appear to be a large volume. It still should never blow out wet fuel.
If it seems more than that, my guess would be that either the vapor separator is jammed (unlikely but possible), vapor vent lines
have become plugged up or carbon canisters are plugged as a result of too much fuel going to them.
Matt
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Ever loose your gas cap? [message #207357 is a reply to message #207355] |
Fri, 10 May 2013 21:27 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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The carbon cannister by design dries out with the air flow over it and evaporation. The carbon absorbs the excess fuel and the system then captures the fumes and pulls them into the engine to be burned.
Some owners of older vehicles disassemble the carbon cannister and replace the carbon with the carbon from the local pet store -- fish tank supplies -- they want to maintain the integrity of the operatiing system and the original cannister for car shows.
Dennis
| Robert Mueller wrote on Fri, 10 May 2013 20:20 |
Matt,
Thanks!
I forgot that a large flow volume would make it seem like A LOT of pressure when it wasn't.
I think you have answered why I get the POOF when I take the fuel cap off. I have filled the carbon canister with fuel on a number
of occasions since I've had Double Trouble.
New question do they ever dry out?
Regards,
Rob M.
-----Original Message-----
From: Matt Colie
Rob,
As I understand the operation of the system, there should be little or no pressure in the tanks at any time.
Problem: Little pressure is often listed as 3~6" of water column. In the volume and pressure compliance of the coach fuel tanks,
this could be appear to be a large volume. It still should never blow out wet fuel.
If it seems more than that, my guess would be that either the vapor separator is jammed (unlikely but possible), vapor vent lines
have become plugged up or carbon canisters are plugged as a result of too much fuel going to them.
Matt
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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