The A8 Engine Performance test prep study program from AVI will give you the knowledge and confidence you need to ace the ASE. Read the comprehensive book, get tips on taking the test, take the practice test and watch over 6 hours of video training presented by ASE Master Technician and instructor Dave Hobbs.

What is all this talk about clean diesel? Is it the fuel? Is it the engine technology? Is it the aftertreatment technology? Is it the push for cleaner emissions? Yes, it's all of the above. Clean diesel is a collaborative effort set forth by the EPA, carried out by OEMs, state and local governments, environmental and community organizations and the Federal government.

In this tech tip, instructor Bill Fulton gives you a quick modern day tech tip that you don't see on their scan tool. It's called Lambda. This is what we call the corrected air-fuel ratio. He discusses Lambda, how it differs from manufacturer to manufacture, and what numbers to look for.

In this tip clip, Bill Fulton discusses the theory and evolution of power-balance testing. Providing insight, techniques, and how it all applies to modern cars, Bill shows you how to better pinpoint fuel balance problems.

Do you understand how to properly service TPMS? Do you know the differences between direct and indirect systems? Take our quick quiz and see how up-to-date you are on TPMS technology.

Today's modern vehicles contain over $8,000 worth of electronic controls replacing the much easier to understand and diagnose mechanical controls of yesterday. Take our quick quiz to test your understanding of voltage drops in today's electrical circuits and get an edge on the next tech!