Thank you for your valuable information. I have Toyota Corolla II. But unfortunately each and every time I put my car into smoke test, it fails. The results show the fuel consumption is very bad and exhaust air contains more CO and CO2. I had enough of this. Each and every time I caught by police for speeding, they will trace my smoke records also. Can you imaging how many times I have payed tickets due to this. I might get a separate credit card or bank account to
pay alabama traffic ticket and get some sleep. So desperate.