odb code 455 - Large Leak in Evap system

[tstaples]

my 99 XJ is throwing this code.
I've read online about Leak Detection Pumps going bad, and Vapor Canistors going bad, etc.... etc..

anyone ever throw this code and find out what it was other than a bad gas cap? I replaced the gas cap and that wasn't it.

just wanted some ideas.... i'm going to start by checking gas lines... though, i dont know how i would check for pressure leaks in them..

[chrometj]

smoke test it, if you know someone with a smoke machine

threw the code after the gas cap? after reset?

[tstaples]

i reset the code yesterday and have driven probably 100+ miles so far without it throwing the code again.... so we'll see

[tstaples]

damn.. code came back.. .crap
maybe my dad's bee smoker would work?