since I bought my 2007 335i it has always shown around 40 psi on the jb4 gauges. the car runs ok in spite of that. well I just did the stage two pump upgrade and it is still showing the same thing.the car still seams to run fine with no codes but this just dosent seem right. I tried adding a little e85 last night with a back end flash and it wants to miss under boost. never had this problem with 93 so im wondering if the low pressure is playing
a factor.