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It sounds to me as if you have some clogging issues.

If you have an Ultrasonic Cleaner, you can put the section/nib/feed in the UC for a few minutes and see what comes out.

Another approach would be to mix a household (non-sudsing) ammonia/water solution - roughly 10% Ammonia,90% Water - and fill the pen, let it set for a few hours and then see what flushes out. This will need to be repeated if you find much ink in the pen. Be sure, of course, to flush well with clear water.

You can also do the Ammonia/water flush through the section alone.

I'm making the assumption you know the basics of breaking down the 2000. While you have the section off, it doesn't hurt to lubricate the piston with a tiny bit of pure silicon grease.

If it is an air leak issue, you should lubricate the barrel/section threads with a bit of silicon grease to see if that helps.  I believe some 2000's have an "o"ring in the barrel/section interface - it never hurts to lubricate the "o"ring - again, with pure silicon grease.

-- Edited by Kelly G at 10:11, 2008-06-05

Tom,

I highly recommend Lamy's service through Filofax. I had a 2000 with a bad piston and they serviced it for the $7.50 no questions asked. The barrel was replaced along with a new feed. I bought the pen on Ebay and had no box or papers but that wasn't a problem.

Their service was good and fast.

kg