Recently, I installed a mechanical boost gauge in my car. On stock tune, I’m currently seeing spike of 15-16 psi and holding a solid 12-13. This is obviously an issue as I shouldn’t be seeing much more than 10, if at all past 10 for a stock tune.
So far, I’ve checked for boost leaks, swapped the n75 twice, checked all lines feeding to that, as well as checked the diverter valve to be thorough.
Could this be a waste gate issue? Sticking? Improperly adjusted? Broken?