CELICA GT (2000)
Cleaning the Mass Air flow Sensor / MAF sensor
The Mass Air flow Sensor is situated after the air filer, before the air hose and measures the air flow into the engine.
From this measurement the ECU can calculate the correct amount of fuel to deliver. Over time small particles of debris build up
on the side of the sensor facing the incoming air. This debris can effect the sensor accuracy, thus causing the fuel air mix to be
incorrect. The photos below show my Celica's sensor before and after cleaning. It is probable the last time that sensor saw the light of day, prior to cleaning, was 9 years ago in Japan!
The MAF sensor is both delicate and expensive $130 - $200+ new! DO NOT TOUCH IT with anything!.
To clean it I used a can of MAF sensor cleaner, this:
Below is the MAF sensor in situ
Below is the dirty side of MAF sensor prior to cleaning
Below is the same side of the MAF sensor after cleaning
Below is another view of the cleaned sensor
Below are the test procedures for the MAF copied from the service manual. I have not tried these!
Disclaimer:
This page is ONLY to show what I did to my Celica!
I take NO responsibility for anything arising from information given here nor do I guarantee its correctness!