Ok, I was going to point out the vnt system, simply because I've noticed when you have underboost issues on these engines, whether it's due to the turbo being too big, faulty vnt, or the rod just not well adjust. It's much more noticeable on lower gears.
I have a hybrid turbo, with a bit of underboost and it's more noticeable on lower gears. Probably ECU doesn't have time to adjust the vnt since lower gears are more quick completing the rpm range.
I have a hybrid turbo, with a bit of underboost and it's more noticeable on lower gears. Probably ECU doesn't have time to adjust the vnt since lower gears are more quick completing the rpm range.