sorry for all the bad luck with the car. integras are very reliable cars generally but like mrfatbboty said, thats 11 years for it to be treated poorly. about the water getting into the trunk, i have also heard about the rubber/plastic tail-light gasket/seals being worn. i think someone on this forum sells custom gaskets for the taillights. about the cat converter, thats just bad luck i guess. usually, the distributor would have to be replaced, if the cap and rotor haven't been replaced, or the cam seal next to the distributor has been leaking oil. about it running on 3 cylinders, sounds like an internal problem i wouldnt know anything about. the good thing is there are many spare integra blocks and longblocks for sale on forums like these for a good deal, so hopefully you can look for a deal. or you can rebuild it with aftermarket internals. sorry, i havent been too much help, i hope someone knows about the major internal problem and has a good solution for it