I have a 335is the car is fbo. The only fueling upgrades it has is a stage 2 lpfp still has the oem hpfp with only 34k miles on it. The car runs great and has no issues under WOT. But when I’m driving around 70-80mph it seems to get this little hiccup mostly when going down hill. The hiccup is almost like the car goes a little more forward then back but I’m not changing the acceleration at all. The only codes I have is 2AAE, 2AAF, 2FCA, 2FDA all shadow codes. Before I buy a new hpfp i was wondering if anyone might think it could be something different.