Nick, As you know, I sent my AquaTunePlus back to you to be checked out. After some discussions with you, I decided to upgrade to the ’06 AquaTunePlus for my ’04 Hyundai Sonata that has the 2.4L engine. Boy, this new unit is a great success. My car runs better than ever and is even more stable than with the old unit! The one word I would use to describe the new unit is WOW! Remember, before AquaTune, I was jumping between 21 to 22 mpg in town. Now, wow, I’m at 29.9 mpg. I’m doing my best to let everyone know that this system is the absolute best. Eventually these people will overcome their skepticism just as I did. Your friend in Pennsylvania, R. W.