Hi all I just completed a swap of a 1999 vortec5.7 with distributor and a tuned port system with sequential fuel injection it runs great and no codes. I went to connect an electronic speedo to pin#50 and I get instant reading of 160mph and a voltage reading on the speed out just when I turn on the ignition I have done a pinout on every pin and I cant figure out what is causing a voltage reading on pin 50 with no speed the voltage is not battery voltage it is around 10 volts HELP thanks Le Johnson