The air/fuel ratio on a Toyota 22RE engine is controlled by the oxygen sensor. The oxygen sensor measures the amount of oxygen in the exhaust gas and sends a signal to the engine computer, which then adjusts the amount of fuel injected into the engine.
If the air/fuel ratio is too rich (too much fuel), the engine will run rough, stall, and get poor gas mileage. If the air/fuel ratio is too lean (too little fuel), the engine will run hot, ping, and could damage the engine.
The ideal air/fuel ratio for a Toyota 22RE engine is 14.7:1. This means that for every 14.7 parts of air, there is 1 part of fuel.
To adjust the air/fuel ratio on your Toyota 22RE engine, you will need the following tools:
* Oxygen sensor socket
* Wrench
* Screwdriver
* Multimeter
Instructions
1. Locate the oxygen sensor on your engine. It is usually located on the exhaust manifold.
2. Disconnect the electrical connector from the oxygen sensor.
3. Use the oxygen sensor socket to loosen and remove the oxygen sensor from the exhaust manifold.
4. Inspect the oxygen sensor. The tip of the sensor should be clean and free of debris.
5. If the oxygen sensor is dirty, clean it with a solvent and a brush.
6. Reinstall the oxygen sensor in the exhaust manifold.
7. Tighten the oxygen sensor with the wrench.
8. Reconnect the electrical connector to the oxygen sensor.
9. Start your engine and let it run for a few minutes.
10. Use the multimeter to measure the voltage at the oxygen sensor. The voltage should be between 0.1 and 0.9 volts.
11. If the voltage is not between 0.1 and 0.9 volts, adjust the air/fuel mixture screw. The screw is located on the side of the throttle body.
12. Turn the screw clockwise to lean the air/fuel mixture or counterclockwise to richen the air/fuel mixture.
13. Continue to adjust the screw until the voltage at the oxygen sensor is between 0.1 and 0.9 volts.
14. Once the air/fuel ratio is correct, turn off the engine.
Your air/fuel ratio is now adjusted.
