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Discussion Starter #1
I replaced my EVAP charcoal canister yesterday, along with the purge control valve/solenoid and purge flow sensor (and all the short rubber hoses that connected them and the nylon lines) and I'm wondering if it's missing something. In the photo below, taken & posted in another thread by Aaron K, in the middle big hole on top of the charcoal canister, it looks like there is something there:

<a href="http://picasaweb.google.com/lh/photo/z1c89mQyaK0GegK0le53ww?authkey=Gv1sRgCNf5sf24j7r4qQE&feat=embedwebsite"><img src="http://lh4.ggpht.com/_o33-awNdKZ0/SohcG_bs20I/AAAAAAAAALI/NgRlknkBHTE/s800/Evap_2.jpg" /></a>

The center big hole on the charcoal canister I removed from my 1997 Thunderbird 4.6 liter V-8 had nothing in that center hole. It only had the small-diameter nylon line with the rubber elbow plugged into the small nipple on top of the canister and the purge control valve/solenoid was plugged into the outer big hole; the center big hole had nothing in it and was completely open.

Am I missing some kind of plug or breather cap that should go in that middle big hole? If so, where can I obtain one? Ford dealer? Junkyard?

Thanks,

Dennis
 

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It should have a cap on it, I am guessing it could fill up with water and dirt without it.
 

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there is the small tube on the left coming from the gas tank, the mushroom shaped vent hole that allows air to be sucked in(there is a check valve inside) and the "output" on the right side that connects to the solenoid/sensor/manifold.

it's a small black tube connected to it, but due to optical illusions it appears as if the small black tube coming from the solenoid is connected to something else.

the one in the middle is just a vent, and should be covered as it shows in the photo. it's just a mushroom cap to keep water out I think
 

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Discussion Starter #5
there is the small tube on the left coming from the gas tank, the mushroom shaped vent hole that allows air to be sucked in(there is a check valve inside) and the "output" on the right side that connects to the solenoid/sensor/manifold.

it's a small black tube connected to it, but due to optical illusions it appears as if the small black tube coming from the solenoid is connected to something else.

the one in the middle is just a vent, and should be covered as it shows in the photo. it's just a mushroom cap to keep water out I think
Yeah, I had mine apart yesterday so I know about both the lines that should be connected to it; it's just that mine seems to be missing that "mushroom" cap on the center large opening.

Does anyone know where I can obtain one of those caps? Can you get one from the dealer or do I have to go to a junkyard?

The funny thing is that, until yesterday, my car never had an inner-fender liner on the passenger-side where that EVAP canister is located! I got a new one from Rock Auto a couple of weeks ago, but didn't put it on until yesterday when I changed the EVAP canister, purge valve and flow sensor. I have no idea what happened to the original liner; there wasn't any liner in that fender since I bought the car in April! Who knows how much crap got into that canister without an inner-fender liner to protect it - especially with that "mushroom" cap missing!

Dennis
 

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can you see right into the hole?? as I mentioned there should be a check valve in there.

where is your old canister? can you not pull the cap off of that one?

it's possible the design was changed at some point.
 

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Discussion Starter #7
can you see right into the hole?? as I mentioned there should be a check valve in there.

where is your old canister? can you not pull the cap off of that one?

it's possible the design was changed at some point.
My old canister appeared to be identical in every way to the new one - if you looked down into the center hole, you could see something white inside that appears to be like fibers or a sponge. I think its the charcoal impregnated element; there doesn't appear to be any kind of plug, valve or cap on that hole. The old one was exactly the same way - no plug, valve or cap on the center hole.

Dennis
 

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Discussion Starter #9
O.K., I just got off the phone with a local Ford dealer and I was told that there is NOT supposed to be anything in the center large hole on top of the charcoal canister. Ford eliminated the breather cap as a mid-year production change (not sure exactly when that change took place; if it was in 1996 or 1997).

Dennis
 

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O.K., I just got off the phone with a local Ford dealer and I was told that there is NOT supposed to be anything in the center large hole on top of the charcoal canister. Ford eliminated the breather cap as a mid-year production change (not sure exactly when that change took place; if it was in 1996 or 1997).

Dennis
Now the questions is "should" there be a cap there? Or did Ford just get cheap and leave it off.

I don't see how having the canister completely open will do much for keeping gas fumes out of the atmosphere (which is the whole reason for the canister in the first place).

I don't know.... :confused:
 
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