ok let me put it this way my RX300 will cranks but won't start battery and spark plugs are new, engine is cranking but want start at all, looks like it want start only on 3 cylinders becouse one side of the engine is warm and the other side of the manifold is cold. When I connect to OBD2 it will not connect, my scaner works with other lexus fine it connects with no problems. the car is geting a spark and has strong fuel presure. and yes the ecu see's the master key. any help would be great. :(