I just finished puting on 2.8 Pulleyboys, Before I installed The gauge only read a 14.5 @ redline some times and the gauge was always very choopy. After the install The gauge doesn't seem to sweep much at all, Before pully it would hold @ 10.0, now it kind of stalls @ 5.0 but the car pulls hard. Any one having trouble with there stock gauge reading incorrectly.

 

Nope. That sounds strange I am seeing almost 16 with my STG II. Sorry cannot help ya

 

I heard someone with the revitup stage 1 or 2 kit had the same problem. They got a mechanical boost gauge and it worked fine.