ty, i've looked over the vehicle and was told it doesnt need an air sensor but the guy who sold me it said it did. the airflow ratio gauge works but the boost guage doesn't...so its probably a wiring issue? the lcd screen says gogreddy, might be a GReddy PRofec e-01 Multi Display Boost Controller? thats where it says the engine is 1800cc yet the valve cover says 2.0L. im wondering if this car came with a star stage 2 turbo kit....ive seen a simliar gs with just about all the same parts and it had that kit installed.