Interesting, so for those of us who are running a basic MC2100 with all the CTO and EGR crap gone, how would that work? Tank goes to tank, purge to carb bowl vent, then air cleaner to one of the little nipples on the back of the air cleaner?
Probably not
If I was running a non-stock carb, I would still make use of the stock charcoal canister system
The TBI system is a bit different then a carb, since the TBI does not have a fuel bowl to vent back. Also, I believe that there is a vacuum sensitive valve inside this TBI charcoal canister, as well as inside the stock AMC canister, so that if the purge source is too much, it will open and pull in more outside air. Without some type of valve, the TBI purge source "could/maybe" cause too much vacuum/pressure in the system
When these systems were designed, they used components that were engineered to work together. I would be hesitant to start mixing and matching components between two different fuel delivery systems
This early model TBI charcoal system is simple:
1) Vent line from tank
2) Purge line directly to the base of the TBI
This particular TBI charcoal canister system is "basic". Once the throttle opens, it starts to purge the system. There is no electronic solenoid to delay the purge, and no thermal vacuum switched purge delay, either. Later TBI systems use an electronic solenoid, that the computer talks to, to initiate the vapor purge, once the engine is warmed up and the vehicle is at cruising speed.
On the stock Jeep carb charcoal canister, a bit more involved, but not too crazy:
1. Purge signal (ported vacuum) (from CTO switch, only allows vapor purging off idle/warmed up)
2. Purge line (manifold vacuum) (line that feeds trapped vapors into the engine to be burned)
3. Vent line from fuel tank
4. Vent line from carburetor bowl
If I was running a carb set up, I would make use of the stock style set up.
I did two quick tests on my charcoal system last night:
1) Disconnected the tank vent line from the canister, hooked up my little hand held vacuum pump, and applied some vacuum. The vacuum did not hold, the air would flow right through, so my tank vent line should be clear of obstructions. After disconnecting the hand vacuum pump, I could smell gas, so the tank is venting through the vent line
2) Temporarily installed a vacuum/boost gauge to the TBI purge source. At idle, no vacuum. Once off idle, and accelerating, the vacuum would increase up to approximately 20in, at around 4000RPM. So, the purge line works, and applies more vacuum as RPM increases.
I should be able to report back in the next few weeks if the charcoal system is functioning correctly, but I believe it should be. The Jeep does not stink like raw fuel like it did before I hooked up the canister, so that is one huge step forward