The close interrelation between fuel filter, fuel pressure, fuel injector, spark plugs, and oxygen sensor to fuel economy

Apart from the MAP sensor and Intake Air Temperature sensor (IAT) there are fuel filter, fuel pressure, fuel injector, spark plugs, and oxygen sensor which are closely interrelated in the car fuel consumptions. We will discuss in this topic how each components contribute to the bad or good fuel economy of the car. 

1. Fuel filter - Dirty and clogged fuel filter will force the ECU to command more fuel to be injected to balance the Air to Fuel Ratio detected by the oxygen sensor. As a result more fuel is consumed as it pump unnecessary fuel to balance the AFR in the combustions.

2. Fuel pressure - bad fuel pressure regulator also potentially lead to poor fuel economy as it unable to deliver enough fuel into the combustions as detected by the o2 sensor as a result the ECU will command the fuel pump to supply more fuel which leads to poor fuel economy.

3. Fuel Injector - clogged fuel injector prevent adequate fuel into the combustions as detected by the oxygen sensor as a result the ECU will command the fuel pump to supply more fuel which result in bad fuel economy.

4. Spark plugs - worn out spark plugs electrode result in less efficient combustions.

5. Oxygen sensor - Faulty or worn out o2 sensor will deliver false data about the car combustions activity to the ECU for example lean data. As a result the ECU command more fuels through the fuel pumps.