[Trak Ratt]

It's part of the gas evaporation system and is located in the right rear fender well just above the thermostat. Part number 993-201-221-01 (Illustration 201-20 in the PET). Hose coming in from the evaporation canister in the front left fender well (above the window washer reservoir) and one going out to the back of the intake. I pretty sure all cars have used something like this since ~1968.

I removed mine for better access to the wheel well for power washing. Once out, I shook it some and it sounded like it was full of course sand. My concern is that a few years ago a dorki had one fail and his motor sucked enough grit into his engine to require a full rebuild.

So my question is should it sound like it’s full of sand or should it be more like the inside of a cat?

If the latter I may have just dodged a big bullet..

[Jazzbass]

Mine sounded like sand when I pulled it out. At least, that's the sound I remember when it hit the bottom of the garbage can. Make sure you plug up the vacuum ports on the back of the intake manifold once the canister is out of the circuit.

[HoodPin]

IIRC, the canister contains graphite/charcoal pellets, so should sound gritty. The Dorki's failure was due to the internal screen having rusted away, and the engine inhaled the pellets, rather than just cleaned fumes.

Not sure if the 911 functions the same as the 944. But in the 944, the canister was in the same circuit as the vent from the fuel tank. And in the 944, the EFI would send overflow fuel from the fuel rail back to the fuel tank. If that vent circuit was capped/clogged, the fuel tank would develop excessive pressure from the returning fuel, and can cause other problems, including gas fumes into wrong places.

[Dr K]

I plugged my line to the carbon canister (and the vacuum line on the engine), and allow a vent from the overflow tank in the left front fender. I ran the car for a year with that tank line plugged, too, but decided I wanted to avoid the pressure build-up. Prior to plugging that line, I had fuel more than just dripping out of the line after I had disconnected the overflow system so needed to do something to prevent it from just dripping on my wheel.

I believe the current solution (carbon canister removed, vacuum line on engine plugged, line from front of car plugged, and overflow running into tank with vent on top (tank never gets significant amt. of fuel in it) is safe.

[Jose]

Originally Posted by Jazzbass

Mine sounded like sand when I pulled it out. At least, that's the sound I remember when it hit the bottom of the garbage can. Make sure you plug up the vacuum ports on the back of the intake manifold once the canister is out of the circuit.

X2.

It's a race car, ditch the emissions crap.