i changed the metering head on my s2 but i wasnt able to start car due to having an ice install yesterday i went to start up and wouldnt fire found out thrs no positive feed to the 2 plugs coming off the metering head theese go stright to ecu so whats up with it iv also had the hand brake welded iv herd folk say that welding makes ecu play up but battrie was off plz help