Air/fuel ratio (AFR) sensors have become commonplace in today’s automobiles, taking over where traditional O2 sensors have left off.
In this video, Andrew Markel explores the difference between the two types of oxygen sensors and how the ECM sees the amount of oxygen left over after the combustion cycle. He also explains how new technology allows modern engines to see more of the fuel trim of the engine.
With lean-burn operating strategies being built into many of today’s gasoline direct-injection and gasoline compression ignition engines, it’s important to build a foundational knowledge of how fuel trims work in the real world.
Adapted from Gary Gom’s article in ImportCar. When confronted with a fuel control problem on a modern vehicle, I’ll normally use short- and long-term fuel trims to determine if the problem is caused by one of many failures, such as a vacuum leak or a leaking fuel pressure regulator. If you’re like me, you’ll […]
Once considered leading-edge technology, today’s oxygen sensor has become a commonplace service item on modern vehicles.
The kicker with trying to diagnose whether an air filter is affecting performance is to see if the long-term or short-term fuel trims have changed.
For political and economic reasons, the use of ethanol gasoline in the U.S. has always been controversial.
Take a look at the fuel injection system and driveability issues on Hyundai’s line of vehicles.