MODEL: Honda Brio 2012
TRANSMISSION: 5 Speed Manual
ENGINE: L12 I-VTEC Petrol
MAJOR SERVICE
1. New Spark Plugs
The center electrode was completely gone. It's hard to find Honda parts in my city, but I was able to find the exact model (NGK BKR6E-11) at a nearby parts shop. I used a measuring tool that I bought on Amazon to check the gap between the wires again. It was exactly 1.1 mm.
2. Coolant Flush
The coolant needed to be changed, and the radiator was extremely dusty. I started with a coolant flush, using Liquid Moly radiator cleanser and distilled water. The water came out clean on the second cycle.
Then I removed the radiator (removing coolant lines was a challenge) and coolant reservoir tank and thoroughly cleaned them. Always take caution when working with radiators because the fins are very flimsy and can easily bend, reducing the radiator's effectiveness.
Finally, after reassembling everything, I poured in the new coolant and started the car until all of the air had been gone. When the air is removed, continue to pour more coolant.
3. Throttle Body Cleaning
I was experiencing minute RPM fluctuation and the throttle body had never been properly serviced previously. So I decided to remove the throttle body and clean it properly myself.
To remove the throttle body, I first had to remove the intake assembly. Also, always disconnect the battery's negative terminal before tampering with anything electrical in the automobile. For cleaning, I used 3M throttle body cleaner, which worked well. (While cleaning, wear safety glasses and gloves because the cleaner included extremely harsh chemicals, and the location should be well-ventilated).
Reassembled everything and rechecked all hoses and connectors using the images I took immediately before removing anything. The OBD scanner is required to reconfigure the ECU's idle RPM settings. However, there are ways to have the car relearn the idle RPM on its own. In Brio, simply turn off all electrical devices, then turn the key to 2, wait a minute, and start the car. Leave it for 10 minutes, and you're done.
4. Mass Air Flow Sensor And Intake Manifold Sensor
If the car's mass airflow sensor is clogged with dust particles, it will give incorrect data to the ECU, resulting in low mileage and power. The MAF sensor is located directly in the intake assembly of the vehicle. While cleaning this sensor, I also cleaned the intake manifold sensor.
The MAF sensor has highly fragile components, so remove it gently and clean it with only MAF sensor cleaner. This cleanser leaves no residue and is designed to avoid damaging any delicate components. I used Liqui Moly's Luftmassen-sensorreiniger.
5. Alternator Belt And Pulley
The belt was very dry and already served more than 70k kilometres, got it changes with pulley from Honda workshop.