How to Check the Stoichiometric Balance on a Wideband Meter How to Check the Stoichiometric Balance on a Wideband Meter

What You'll Need
Wideband meter
Oxygen sensor

The wideband meter is a measuring device also known as the air fuel ratio meter. These devices have a number of different benefits, the most obvious being benefits to the environment, and to fuel efficiency. Knowing the correct amount of oxygen being pumped into the car can certainly help you to get the most from your engine. However, in order to make the correct adjustments to the car, you will first need to know that the balance and maintenance of the wideband meter is correct. In order to do this, you should check that the stoichiometric balance is at the right level before you proceed. 

Step 1 - Locate the Wideband Meter

You will need to locate the wideband meter on your car. Most of these types of air fuel ratio devices are stand alone, which means that they are located in the car by themselves, and do not need any additional assistance from other parts of the car, although some may be found mounted in special housing near the side of the car. Most wideband meters have a number of LED lights, usually 10 or more. Once you have found this on your car, you can then proceed to the other parts of this guide.

Step 2 - Locate the Right Balance

Open up your car manual, and find the section which should let you know what the ideal stoichometric ratio is for your car. You may not be able to find the correct type of ratio for the car in your manual, in which case you might want to check online. Most cars are able to manage a stoichometric ratio of around 14.7 to 1, which will allow the catalytic converter to take in enough efficiency. You should use this balance as your guide when you check the balance for your system. This ratio is usually confirmed by the sensor on the equipment.

Step 3 - Locate the Sensor

Using your screwdriver, remove the oxygen sensor from the wideband meter, and check it for signs of damage. If you can find nothing which indicates that the sensor is damaged, then you should be able to replace it into the wideband meter, and use this as the basis of your ratio details. Examine the sensor, and see what ratio it reads when you have been running the car for a few minutes. Give the car enough time to warm up reasonably, as this will be necessary before you can consider the results to be accurate.

Step 4 - Use Another Sensor

If you don't want to remove the oxygen sensor from your meter, then you can purchase another, and use this to calculate the amount of oxygen versus fuel which is entering your car. Using these 2 amounts, you can then work out if you meat the ratio requirements noted above. If your car is not taking in enough fuel, then you should consider reducing the amount of oxygen which the wideband meter introduces into the engine.


Got a New Project You're Proud of?

Post it on Your Projects!