Connect with us

Features

Modern Fuel Control Diagnostics: Sorting Through the Datastream

When confronted with a fuel control problem, contributing writer Gary Goms normally uses 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. He says some aftermarket scan tools may display AFR sensor data in a confusing way, so he helps techs sort out this datastream maze.

Advertisement

Air-Fuel-Ratio-Datastream-3When confronted with a fuel control problem on a modern vehicle, contributing writer Gary Goms normally uses 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.

Advertisement
Click Here to Read More
Advertisement

“If you’re like me, you’ll occasionally access the air/fuel ratio (AFR) sensor serial datastream to determine if the ­sensors are functioning as ­intended,” Goms says. “But, modern aftermarket scan tools often ­display AFR sensor data in a conventional 0 to 1.0-volt format, lambda, equivalency ratio, AFR voltage, and even milliamperes, all of which can be confusing, even for ­veteran diagnostic ­technicians.”

In the field, the lack of familiarity with a particular datastream can also lead to some serious ­diagnostic errors. Goms starts off by sorting out this datastream maze by looking at the basics of zirconium dioxide and AFR oxygen sensors.

Go to http://www.import-car.com/fuel-control-diagnostics-datastream/ for the complete article.

Advertisement
Click to comment

POPULAR POSTS

Equipment

New Americana Limited-Edition ArcticPRO Machine Helps Operation Support Our Troops

Features

Are You Regularly Maintaining Your Equipment?

Features

The Ins And Outs Of Sanders

Products

New SOLAR 12V Digital Battery and Electrical System Tester

Connect