[dcb]

Ok, well see if you can get it to stop on 12 volts with the ignition on by rolling the car back and forth by foot a little, then test it at every point on down the line till you dont see any voltage. I.e. test where the vss wire goes into your board, test one side of the vss 100k resistor, test the other side of the vss resistor, then test pin 14 (analog 0). analog 0 shouldn't be more than 5 ish, if it is less and b10 is at 12 then it is a wiring/build oops of some sort.