Thank you for the advice. The problem seemed to be a leak at the main canister fuel filter gasket (never would have guessed, since I replaced that filter months ago). The car runs fine now and has normal power. I ran it up some hills and got some of the carbon out...no smoking at idle now.

I'm still not satisfied everything is fixed with the fuel system. It seems to take longer to start than it should, and I still smell fuel when the car is sitting and appear to have a leak, somewhere...but can't find anything.

I hate to think of taking the tank out to clean it...cleaning the oil bath air filter out was bad enough!

Are there any particular products that are good at cleaning the fuel system? I've been using Hi-Test (Lubro-Moly) in the tank but nothing else. Also haven't done a diesel purge yet but maybe that'd be a good idea?

Thanks,
AC