The charcoal canister may be saturated. You can buy replacement charcoal inserts. I think that would be smart. Leave the canister, crapcan all the rest. A properly working canister system can actually improve mileage.
What about the air pump? It's the size of a small alternator and the motor must turn it. But I just bought a 'new' reman' one. :banghead: Pretty easy to delete?