Article written by Mark Warren
Published in the August 2001 edition of MOTOR Magazine

Scanners, scopes and graphing meters are invaluable, but sometimes it takes the readings from a good ol’ 4- or 5-gas analyzer to get you to the promised land!

an excerpt…

“Conducting training classes around the country, I’m constantly surprised by the number of shops that don’t own a 4- or 5-gas analyzer. These shops wouldn’t be caught dead without a scan tool, an ignition scope, a CD based information system, etc. But a modern exhaust sniffer? Forget it! That’s a shame, because these guys don’t know what they’re missing out on.”