So, the rebuilt 2.8 is now in the car. All is hooked up. It runs, at about 3000 rpm. I have checked for vaccume leaks, grounds, sensors, switches. When I placed this into service, I replaced all intake gaskets and orings. Used my throttle body as I knew it to be good. I am running 7730 ecm with a knock sensor. I have driven the car about 70 miles and gas milage is about 10 miles per gallon.