How Dirty Mass Air Flow Sensor Affect Your Nissan Patrol ZD30 Turbo Performance

Air Flow Sensor also known as the MAF sensor. The Mass Air Flow (MAF) sensor is becoming contaminated with oil in the inlet tract due to the process of the crankcase ventilation system. By venting the crankcase into the inlet manifold (where the gases go through the engine and are brunt) there was always the possibility that oil fumes from those crankcase gases could contaminate the MAF sensor.

If that happened, the MAF sensor (which is responsible for telling the on-board computer how much air is going into the engine so the ECU can tailor the fuel supply to the injectors to match) could send an erroneous signal to the computer with an incorrect fuel-air mixture as a result. this could increase the combustion chamber temperatures beyond the safe zone. And there goes another piston.
How to avoild tihs happneng?

These Sensors can become contaminated with oil fumes in the intake system, it is important to clean them with Sensor Cleaner. We recommend changing them every 60,000km or 2 years.