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Re: Charcoal Canister Issue
[Re: 426Wish]
#2362803
08/31/17 12:25 PM
08/31/17 12:25 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Yep, had it happen on my 72 Swinger years ago due to failure.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Charcoal Canister Issue
[Re: 426Wish]
#2362819
08/31/17 01:00 PM
08/31/17 01:00 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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No, it didn't destroy my engine, the stiff is fairly fine and easily crushed.
Whatever membrane/filter that lets the fuel vapors thru and kept the charcoal in place had failed and allowed the granules of charcoal to be sucked into the carb.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Charcoal Canister Issue
[Re: burdar]
#2362820
08/31/17 01:01 PM
08/31/17 01:01 PM
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Joined: Nov 2003
Posts: 10,228 Colleyville
3hundred
I Live Here
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I Live Here
Joined: Nov 2003
Posts: 10,228
Colleyville
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I would think that wouldn't let the charcoal be sucked up into the engine but maybe not? I've seen them fail, charcoal "pellets" wind up in the float bowl, they're just the right size to block the main jets in a Holley. "Southern" solution, install a cheap fuel filter screen in the line to the carb. Robert
'68 Fury Convertible '69 300 Convertible '15 Durango 5.7 Hemi '16 300 S Hemi
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Re: Charcoal Canister Issue
[Re: 426Wish]
#2362853
08/31/17 02:08 PM
08/31/17 02:08 PM
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Joined: Feb 2010
Posts: 1,645 Phila. Pa.
Mattax
top fuel
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top fuel
Joined: Feb 2010
Posts: 1,645
Phila. Pa.
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Pretty much as been described, the big issue is when the foam filter at the top starts to decay. Depending on how the system is set up, something else may be failing that encourages the charcoal to migrate to the carb bowl, or I suppose the fuel tank. One of those is the breakdown of the charcoal into fine dust. Another can be the valve seal in the carb vent line to the charcoal cannister. That's going to vary depending on the setup. But anytime the bowl's pressure is a little less than the pressure in the charcoal cannister, stuffs going to migrate toward the bowl. I ended up rebuilding both the canister and the solenoid operated valve on my waggy. Where's this dirt coming from? and my Vapor Canister Rebuild How-to in the IFSJA archives may give you a sense of what may be involved for yours.
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Re: Charcoal Canister Issue
[Re: 426Wish]
#2363092
08/31/17 10:26 PM
08/31/17 10:26 PM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Thanks guys! What would happen if I kept the canister and emptied all of the charcoal? The system should still work the same. Correct? No as the charcoal catches and stores the gas fumes in the charcoal. Most back in the 70's that used carbs had a type of purge valve on top of them that normally have a manifold vacum line to the valve on top that was normally closed. Then it had another line that was ported vacum and did not get vacum until you stepped on the throttle so far and then the ported vacum would open the valve on top the canister and the manifold vacum would then purge the fumes out of the charcoal canister and burn them in the eng. Most usually have a filter on the bottom because the air has to flow through them so the manifold vacum can suck(purge) the gas fumes out of it into the eng. If you took the charcoal out it would just let the gas fumes go right out of the canister into the air like any of the older cars with no evap system. Most muscle cars of the 60's did not have any evap system and just vented the gas fumes on hot days to outside air. Newer fuel injected cars us solenoids controlled by PCM's to opperate and purge the canisters. You dont want it to purge at idle as then it would be to rich at times when at idle. So they purge when stepping on the gas driving down the road so you dont notice it while driving. Ron
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