Can someone tell me where the charcoal canister is located on a 3rd gen? Anyone know how difficult it is to replace?

 

its behind your rear axle right in the middle under your spare. remove your spare and its easy to access....shouldnt be that hard to replace...BUT...those canisters are bloody expensive (try to find used one)!!!

-B

 

Not sure about the later models, but the one in my '85 is easily cleaned. I just followed the steps listed in the Factory Service Manual. Seems to be the original cannister and is still working fine.

 

Hello, Dianna ... I'll second "4Crawler's" suggestion on this as it is pretty easy to do & if you managed to get those rear shocks off (did you???), you can definitely handle this tiny bit of maintenance up keep.
That is , unless it's a sealed unit, I'm not sure.

 

I am pretty sure they are sealed on a 3rd gen.
No way to service, just replace.

 

Anyone know how to clean the charcoal canister on 2nd gens?

 

I just tried to pass that bit of info on, but got bumped off of the forum.
I'll try again tomorrow.

 

What is a carcoal canister for/do? WHat are signs one is bad?

 

Cannister is sealed and filled with charcoal. Part of the fuel tank evaporative emissions control system. Fill gas tank w/ cold gas from underground tank, park truck in the hot sun, gas in tank expands and forces fumes out. Cannister is in the tank vent, charcoal absorbs the fumes. Then later when the engine is running, vacuum is pulled on the cannister to suck the fumes out into the intake, where they are burned.

To clean, pull cannister out, plug the Purge port and blow ~40 psi compressed air into the tank port, dust and dirt should flow out the vent port on the bottom.

 

I was reading in other old posts on this that is can become saturated with fuel if you overfill. But if there is air moving through it when the truck is running, won't it dry out?

How can you tell if one is "bad" or needs to be cleaned? Sould it part of a PM routine?
To be honest, I learned my truck has a new part today

 

Factory Service Manual will have the full test/clean instructions. On my '85, it says blow low pressure air into the tank port, make sure it flows out the purge and vent ports. Then blow into the purge port and no air should come out the other ports. Suppose you would see liquid come out if it was saturated. Cleaning might help.

 

thats why they tell you to not to top off the tank...

i have a truck with a 22r... where is my charcoal cannister.... and 40 psi, can i push more through it?

 

Don't pump my gas in NJ. It's full serve. I will make sure to tell the guys not to do it anymore.

 

If it is like my 22re, it is right below the wiper motor. I think my 22r was in the same place but I'm not sure. It looks like a giant fuel filter.

 

I'm pretty sure on the 2nd gen, it's on the engine fire wall. I reversed the gas line once and fuel ran out when it got hot. down on the passenger side frame.

 

Should be under the wiper motor on the 22Rs as well. I cleaned mine by turning down the regulator on my air compressor. Too much pressure and you might blow the filter out of the thing and then the charcoal would come out I would imagine.

 

Are there any symptoms of a dirty or clogged canister? I've never clean one and haven't heard of one being done.....until now.

 

Check out my post over on the "Maintenance & Repair" board & let me know what ya think.