I fitted my c20let into my astra sport was running ok..
Started over fueling and running very rough checked for air leaks, plugs new dizzy cap rotor arm etc... was all ok
Still was running badly and started to cut out, so connected a multi meter to the signal wire on lambda sensor (2months old) when the car was cutting out the meter was showing 0.10 volts, meaning lean running. This would happen every 500 meters or so.
i unpluged the Lambda sensor to get me home, car ran fine...but with engine light on.
Now the weird part is with the Lambda unpluged, i tested the signal wire which goes to the ecu and with the ignition on is showing 5volts!!