Originally Posted by
AwAfrican
20psi is a high for that tune, which would explain the overboost code. Re check all your hoses, hose clamps, also check connections on your boost controller both electrical and hoses, maf plugged in tight? What about bpv hoses and seal? You can also reflash the map and see if that helps...Make sure you drive for about 50km before you even go WOT.
On a side note go throw that Cobb ots map in the trash, if you want a decent ots map pay justin @ freektune 75usd for one of his and you'll notice the driveability improvement instantly.