Sudden loss of gas mileage?

[OrangeCrush]

When I installed the supercharger, I installed a bigger throttle body. In order to use the bigger throttle body, I installed a little box that basically allows the throttle blade to open 100% instead of only 80%.

The box is a sealed unit about 1.5" x 1.5".... it's not very big but it is sealed.

The day I left to drive my H2 to FL and had the tranny fiasco, I must have accidently pulled one of the wires from this box out of the harness it was attached to.

After some checking, I figured it out, soldered the wire in and everything was fine.

My problem now is I can't get over 8 mpg driving the truck as much like an old lady would. If I drive the truck normally, it's nothing to only get 5.6-6.0 mpg.

I don't know what may have changed and if this box could go bad but there ain't no way my H2 is only getting 8 mpg driving like an old lady.

With this little box and throttle body installed, I could get 12mpg if I drove like an old lady and average 9 with my heavy foot.

Any suggestions?

Mark