Check the vacuum line to the BOV, and the recirculation line from the BOV to the intake for leaks, kinks, or obstructions. A new 1g BOV can be had for under $100 from Slowboy Racing, but check everything out first.http://members.shaw.ca/dsm.1000q/Engineprimer/2G/-Thats a very good tool...

Find some Lucas Oil transmission fluid additive. It supposedly helps slipping and other things. Put it in with your fluid change.

Just look at all the wiring in question for shorts or bad connections.

Its the outer seal that sits against the window, that's whats letting water into the door.

You're going to have to list all of your mods in your profile in order for anyone to help.

Do a search. A boost controller is basically useless unless you have the supporting mods.

Doesn't the car need a CAS to run right? Maybe you jumped timing a bit.

Try tightening the clamp. If it doesn't help, it looks like you're going to have to take the turbo out and check it.

That's what its for.

It sounds like an oil line if its coming from in between the compressor and exhaust housings. Make sure they're both tight. Did you use new crush washers for the banjos when you you re-installed it? They can not be used twice. Also, did you put a new gasket on the return line?

It wouldn't run without a maf.

If it changes with the RPM's, it's not the center diff or rear. They change with speed. It might be lifter tick or valve tap. Kinda wierd that it would come from the rear of the car though.

Yes, get it as clean as possible.

That will REALLY help. I've done it before, and it makes a world of difference.