Hi,I am only boosting 12psi insted of 15-18.Was fluctuating at 11/12 then hitting 15 with original diverter valve, so fitted n710. throttle response is now better, but I am only hitting 12 psi and no more.It will hit this level when floored in any gear, and just sit there, and it just doesent feel that quick ! Got a cheap vag com lead which showed 2 codes 16500 which was down to the faulty thermostat that I mentioned in a previous post, and 18010 which logs as "power supply terminal 30 voltage too low p1602", which I have know idea what that means.Anyway cleared the codes and went for a drive for 20 mins then re checked for the codes, which had not returned. Any ideas on the relativley low boost. I only have the shareware vagcom and am new to that so not quite sure what values/blocks to log and look for faults in. All input gratefully accepted.