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Mass air meter - Wikipedia, the free encyclopedia (723 words) |
 | The MAF meter is placed between the air filter (which must be of the paper type to avoid any fluids reaching the wire) and throttle body on most vehicles so it can measure the air flowing into the engine. |
| MAF meters supply the ECU with a voltage from 0 to 5 volts that represents a measured airflow through the meter. |
| The output of the MAF transfer function is used to calculate two very important components of internal combustion engines: the air-fuel ratio (AFR) and the degrees of spark advance. |
| Understanding the MAF (1768 words) |
| The MAF transfer function not only tells the computer how much air is coming into the motor, but the function is used to calculate load using other inputs which profiles spark and fuel. |
| This is why when a MAF transfer function, the data stored in the computer about the sensor, is derived for one vehicle it may not be identical to the transfer function for a similar vehicle with the same exact sensor. |
| To modify the MAF sensor is in all practicality a bad move without telling the computer that the flow has increased via the transfer function table. |
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