I have a turbocharged D16 engine and I am having a bit of trouble with it. I have a mixture sensor on it and it is showing an excessivly lean mixture as soon as I start boosting and it dosnt go away until I let my car cool down. Also my radiator tube from the engine to the radiator is blown up like a ballon and I believe this may have something to do with it. When I drained my radiator and refilled it with new fluid the my engine was runinning well and with a good mixture for about fifteen minutes then it went back to the same excessivly lean problem. Can anyone help me or does anyone got suggestions?