You are correct that 30ma is an acceptable sleeping mode drain, but 340ma clearly puts you up in the parasitic drain category.
I don't think which fuse you pull is the key, I think just the act of pulling any fuse sends a signal to whatever is causing the drain. A change in current may wake up the sleep mode.
I'd want to first try pulling a fuse and seeing what the current measures after you let the car go to sleep. You might have to do this with many fuses until you discover which one was different than the rest.
How and where are you measuring the current drain?
Last edited by GoForthFast; 01-28-2013 at 11:40 PM.