Fitted a panel KnN air filter into the 9-3 sports sedan. Initially, no problems were noted and the car ran smoothly and pulls more strongly. However, after a day, the car suddenly started drinking petrol at twice the normal rate. Abt 20litres/100km travelled. Eventually, my full fuel tank went empty within a day.
This is really weird. Could the ECU be sending a signal to increase the fuel needs for the car since the aftermarket air filter allows for more air flow? If it is, how come the ECU cannot adjust accordingly?
Please advise.