To BadZCar: New at this so bear with me. I just replaced my HKS EVC EZ do to a significant boost spike (approx. 3 lbs. @ 20 psi. Had an old HKS EVC 2 which worked great until the stepper motor gave up the ghost. I even sent it (the EVC EZ unit) in to HKS to check it out, they stated it checked out O.K. Haven't had good luck with HKS standing behind product claims. Replaced it with a Greddy Profec B, which most of the TT people in Cal. seem to run. Have you had any problems (ie. boost spike) with your EVC EZ unit? Take care!