Is it really necessary? Can it be easily removed and has anyone here done it? Tips? Pics?
Any good reason to keep my charcoal canister?
- Thread starter jjbodean1970
- Start date
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Best to keep it. Unless you provide for some other way to occassionally release vapor pressure from the system you can end up with other problems.
60wag
SILVER Star
It keeps your Cruiser from smelling like it has a gas leak and it reduces smog without drawing any power off the engine.
I drove my 92 fj80 for a year with mine bypassed, forget why I did it but whatever reason it was it didn't effect anything, didnt smell either. But if its not toast I say to keep it......its not hurting anything
Where in the truck is this located and what does it look like? Not sure that I'd have it anymore after the conversion to a SBC...
JJ; See my thread in the 40 section about a strong gas leak. My canister was removed by the PO. I'm not sure if that's the reason, but I've been having a gas leak and strong odor in my truck. I'd leave it if it's not causing any problem.
treerootCO
Where are my keys?!
perfect example why to keep it.....
My '78 never had one and my truck wouldn't run in the heat. Turned out the tank didn't have a vent. I traced the hose that used to go to the charcoal canister and it had a bolt stuck in the end of the hose. I unplugged it and went on my way. Just by venting that hose again I was able to fix the problem.
I felt good about fixing one of my many problems so I went to the gas station, filled up, and went for a drive. Everything was fine until the tank got hot. Turned out, the hose was lower than the tank and started siphoning fuel out. I didn't realize what was happening until I had dumped a full tank of fuel out the bottom of the truck. I still don't know what kept the fuel from igniting that day. That could have been ugly.
My '78 never had one and my truck wouldn't run in the heat. Turned out the tank didn't have a vent. I traced the hose that used to go to the charcoal canister and it had a bolt stuck in the end of the hose. I unplugged it and went on my way. Just by venting that hose again I was able to fix the problem.
I felt good about fixing one of my many problems so I went to the gas station, filled up, and went for a drive. Everything was fine until the tank got hot. Turned out, the hose was lower than the tank and started siphoning fuel out. I didn't realize what was happening until I had dumped a full tank of fuel out the bottom of the truck. I still don't know what kept the fuel from igniting that day. That could have been ugly.
Just some info:
One option for removing the charcoal canister, should you decide to do so, is to install a vented gas cap. I've seen this several times on other vehicles (supra turbos namely) from which the canister was removed. This will provide the ventilation you need and at a point high-enough in the system to prevent the aforementioned siphon-effect.
I'm not sure about extreme lateral lean-angles though . . . I suppose if you tipped the rig far enough to the side of the filler-opening, you might dribble a little? Not sure on this point, as I've never tried it.
The only reason most folks remove the charcoal canister is:
1. the canister is faulty somehow and they don't feel like replacing them, or
2. they need/want to clear-up some space under the hood (to install some other neato item (like maybe a catch-can to eliminate PCV) or just to clean-up the clutter).
The purpose of the charcoal canister is to reduce evaporative emissions (escaping fuel vapor), just in case anyone cares. They do not affect the exhaust emissions in any way.
Regards,
Mica
One option for removing the charcoal canister, should you decide to do so, is to install a vented gas cap. I've seen this several times on other vehicles (supra turbos namely) from which the canister was removed. This will provide the ventilation you need and at a point high-enough in the system to prevent the aforementioned siphon-effect.
I'm not sure about extreme lateral lean-angles though . . . I suppose if you tipped the rig far enough to the side of the filler-opening, you might dribble a little? Not sure on this point, as I've never tried it.
The only reason most folks remove the charcoal canister is:
1. the canister is faulty somehow and they don't feel like replacing them, or
2. they need/want to clear-up some space under the hood (to install some other neato item (like maybe a catch-can to eliminate PCV) or just to clean-up the clutter).
The purpose of the charcoal canister is to reduce evaporative emissions (escaping fuel vapor), just in case anyone cares. They do not affect the exhaust emissions in any way.
Regards,
Mica
PabloCruise
SILVER Star
It allows your tank to vent in a safe way. Safe in that your tank can expand when warm fuel returns to it, safe in that you do not suck fumes into the cabin, safe in that you do not vent fumes to the atmosphere.
It costs NO horsepower.
Depending on where you live, you may fail emissions w/out it.
Why do you want to remove it?
It costs NO horsepower.
Depending on where you live, you may fail emissions w/out it.
Why do you want to remove it?
re: charcoal canister
This is a bit off-topic but is puzzling me: Other posts suggest that it's
common and normal for the gasoline tank to have positive pressure.
You can hear/smell see this when you open the gas cap to refuel and
fumes/air rush out. But it also sounds like the charcoal canister and
associated tubing are there to vent excess pressure. So how does this
work? Does the pressure vent only when it gets to a certain level?
And how do I know if my charcoal canister system is working?
This is a bit off-topic but is puzzling me: Other posts suggest that it's
common and normal for the gasoline tank to have positive pressure.
You can hear/smell see this when you open the gas cap to refuel and
fumes/air rush out. But it also sounds like the charcoal canister and
associated tubing are there to vent excess pressure. So how does this
work? Does the pressure vent only when it gets to a certain level?
And how do I know if my charcoal canister system is working?
60wag
SILVER Star
There are some spring loaded check valves in the charcol can. It takes at least a couple psi to open the check valve. So, yes it vents when it gets to a certain level. There is a test for the can in the Toyota service manual - I don't rember the details, but basically you pressure test it to confirm operation of the check valves.
