Article written by Mark Warren
Published in the February 2010 edition of MOTOR Magazine

A good diagnostician may not know the answers, but he knows what questions to ask to get them. This is the second of a three-part series explaining why you need an exhaust gas analyzer for diagnostics.

an excerpt…

“First, some review and clarifications. The first column (December 2009) can be found at www.motormagazine.com. In that column, we referred to the Brettschneider formula, which calculates Lambda by accounting for all of the fuel and air molecules passed through the engine. You do not need to understand the formula or do the complex calculations; your gas analyzer likely does this for you in real
time. Or, you can record the gases and plug the numbers into an online calculator.”