There is a logical explanation. Steven, when you were here, we ran them and it was working then, so you should have some SOTP comparison. You have probably just gotten used to the power plus some heat soak issues and think it is not running like it used to. This happen to me and caused me to install a pulley and redo my intake configuration. Just change out your pump and it will be piece of mind. then work on getting yourself a CAI of some sort. Good Luck