Yup, thanks. I've been having problems with the cannister being clogged, I'm too lazy to get it fixed...Originally posted by ToyTech:
<STRONG>The bottom hose is just a vent, it does not connect to anything.
Check all of the related vacuum plumbing, vacuum valves, fuel lines, and fuel filler cap. Sometimes bad cap will not allow the pressure in the tank to equalize, and this can saturate the canister. If the canister gets too soaked with raw fuel, it may need to be replaced in order to pass a smog check.
I'm glad you can contribute your Scout/Sammy expertise in this forum, fawker! <IMG SRC="smilies/thefinger.gif" border="0">Originally posted by fatkid:
<STRONG>I haven't had that problem since I switch to Matchlight. That stuff starts every time. <IMG SRC="smilies/smokin.gif" border="0"></STRONG>
Exactly my problem. I run between 2000 feet and 7200 feet regularly, between the pressure change and the uphill load, I can smell gas, open the cap and vent the tank, and get dripping from the cannister. Once, I opened the cap some, and gas GUSHED out (like, under pressure!!!).Originally posted by Colorunner:
<STRONG>I may have a problem with my charcoal canister as well.
I will also have problems when I take my truck up in altitude say 3000 feet or more within an hour time frame. My gas tank will build up a lot of vapor pressure and I can start to smell gas as I'm driving and I have to stop and take off the gas cap to vent the fumes which will then vent for way longer than normal.</STRONG>
Originally posted by Rynomite:
[QB]Do you notice this with a full tank only? Mine only did this with a mostly full tank.
Of the times I've noticed the major pressure buildup, yes, the tank has been relatively full. Say for example, I pack up the truck for a camping/wheeling trip. Fuel up on the way outta denver (5280ft.), then drive say 1 hour up lefthand canyon to about 8000ft. and it starts to smell of gas while driving. If the tank's 17 gal or so, by the time i've hit 8500 i'd be down to around 12-13 gal so there should be enough air space to handle this pressure.
However, I'll hear the "air leak" around the canister even with an almost empty tank after it's been run.
Question is WHY does it build up the pressure in the first place as opposed to recovering it thru the system? (Not relative to simple change in altitude and how that affects pressure) Does a clogged/never replaced canister cause this alone or should we be looking someplace else?
No worry about the gas tank lines, it's never been replaced since it rolled off the line.
OK, I'm no expert, but this thing really doesn't do a lot for you. The only reason I can think that a canister would make you run rough is if it is full of gas and flooding the engine through the vac lines. Disconnect the can and try to dump it out. If you get gas, that would indicate that your drain is clogged. Other than that it can't affect the way you run.Originally posted by Colorunner:
Question is WHY does it build up the pressure in the first place as opposed to recovering it thru the system? (Not relative to simple change in altitude and how that affects pressure) Does a clogged/never replaced canister cause this alone or should we be looking someplace else? [/QB]
I've seen one made out of a coffee can and plain activated charcoal. I don't know how you could tell if it worked. It's for enviro purposes only.Originally posted by Colorunner:
<STRONG>What has everyone who's replaced theirs used?
Is there a way to open the canister and replace the charcoal with standard activated charcoal like found in water filters and environmental filters? Has anyone done something of this sort?
Now that's not a bad idea here if it works. Thanks. Might have to go home and fire up the compressor and try this. Let's see, free air and 15 min of work vs. $216 at the dealer. Hmmmm..... Any one got other suggestions on cleaning/replacing this thing?Originally posted by '89ToyMan Dan:
<STRONG>One thing I checked on the canister on my truck was if the check valves in the canister were sticking. According to the manual I've got if you blow compressed air into the canister through the line comming from the fuel tank air should come out the purge port and the vent port. It says that you can clean the canister by blowing compressed air into the tank port while plugging the purge port with your finger. For some reason it says not to use more than 43 psi. ??? Those check valves might be sticking. It didn't take me more than 15 minutes from unbolting it to sticking the thing back on. Good luck</STRONG>