i would flush the inside of the cooler with water(block one end and fill it up then shake it)... 2 or 3 times
then rince with some fuel or metho...
outside use some mag cleaner should come up nice.
yeh take the CAS off.... but remember to check the timing when you put it back together...
The black plastic bit that the CAS wires go through just clips off by pulling it up...
you could just get a but of stainless pipe and roll the ends... if you can't roll them weld a bead on the end and grind it down so you can fit the hose over...
your AAC valve could be stuck open... never herd of it doing this but it would be possible for the solinoide to be stuck up...
The aac valve lets air in your plenum bypassing your throttle body to maintain a good idle...
Search AAC valve cleaning...
Item: Apexi AVCR
Age: 2 Years, Hasn't been used for 1 year
Condition: Good
Price: 400 ono
To Fit: (What car) Any turbo car
Location: Gladstone Qld
Contact: PM
Comments: Going to get a Haltech with boost controller