Charcoal Canister Off-Now What

Oh Yeah...anybody know where I can get a new filter and/or canister iff I need one...Local Jeep dealer says part is discontinued!

The filter is called an emissions or evaporative system filter and costs a couple bucks at most auto stores.

The reason the PCV might be off is because it has a blown purge valve on top. If so when you T it to the PCV line the idle might go nuts. If the idle stays stable, no problems.

There used to be a solenoid thing on the PCV line behind the carb that also went to the canister. Maybe it is just disconnected because the solenoid failed. They are garbage anyway and should be replaced with a T.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Jack-Jack wrote:

It does have that valve on top with the spring underneath it which I disassembeld and cleaned etc..So I'll try to reconnect the PCV with T & see what happens as for the cannister itself is there any maintenance for it?

That cannister was the death of an engine for me, so replace it ASAP. Basically, after replacing the plastic valve cover with a new plastic one, it sealed up things -too- well. The cannister was plugged, so the full force of the vacuum was trying to collapse the valve cover. At some point during a long road trip, it sucked one of those little rubber grommets that support the valve cover down into the engine and blocked an oil drain holes.

It was never the same after that.

Where can get a new one, Jeep says they are discontinued?????????

As I recall the charcoal canisters starting back in the 70's had a filter, of sorts, on the bottom that was replaceable. I don't recall ever buying one but vaguely recall cleaning the existing filter.

From what I recall the canisters were only considered 'ruined" if the filter material was allowed to become saturated.

The charcoal was, if memory serves, 'activated' in part by 1500 degree steam so boiling would not be an viable option.

I have heard several times over the years of people needing to replace a missing charcoal filter and having no luck at dealership parts departments. I would try at your local salvage yard and if they haven't one (which would not surprise me) they can get you one from another yard. Most 'good' salvage yards are on a parts locator network.

You may have to pay shipping from a yard not located in the snowbelt where lots of 20 year old vehicles are still on the road.

Ok then I have been working on this all night.

I have 4 outlets on the canister...tank, carb float, PCV & dist vac.

The PCV was not hooked up and another post covered it.

Where does the dist vac go? Mine is running into the bottom of the carb on the valve cover side. Is that correct, I don't see how it could be.

I have an 86 CJ7 w/258 & Weber.

Thanks so much!

Is yours dead? Does the idle go nuts when you plug in the PCV line and leave the distributor vacuum off?

They 'are' available aftermarket. I do not remember where, but it has been posted here before.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Jack-Jack wrote:

The 'ported' vacuum on the stock BBD carb is on the valve cover side about half way up. This is for the distributor advance (with no computer) and the charcoal canister and the EGR.

'Usually' the line comes out of the ported nipple, then has a T fitting. One way on the T goes to the distributor, the other way goes to the CTO valve and from there to another T fitting. From this one line goes to the canister, the other to the air filter's switch for the EGR valve and from there to the EGR.

Here is a good site on the vacuum lines and other junk:

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

Jack-Jack wrote: