hi basically i bought a series 2 and it was missing the ecu and few little bits. got an ecu but it runs really rich and hardly starts, when it does start it chucks out loads of black smoke and can smell the petrol. Is there any way i can adjust the fuel? have tried adjusting metering unit but no good. When i disconnect the petrol pump it runs lovely for those couple of seconds so its gotta be the fueling. anyone help?