High emissions are one of the top reasons that a car fails the state inspection. If your vehicle doesn’t pass the test, then your vehicle might be producing too much pollution, burning the fuel more than normal, or the emission control system isn’t working properly. These issues are the signs of wear inside the engine, or there is a problem with the fuel delivery and ignition. This is... https://carengineguru.com/a-list-of-factors-causing-high-emission-problems/