Chip Box Why does my car smokes excessively? 19 November 201524 September 2020 by ChipPower Excessive smoking is probably caused by too low level of air in the air-fuel mixture. Check if the filter in your car is clear enough to pass a sufficient amount of air. Additionally, reduce the power of the chip. What does the ‘check engine’ means and how to cancel it? Why does my car went into limp mode?