Lean Is Mean

by | Jan 2010 | Import Service, Toyota | 4 comments

by Kerry Jonsson
There are hundreds of diagnostic trouble codes (DTCs) that an engine management system can use to alert the technician as to where it has found trouble. All too often, we give credit to the OBD II system for being able to pinpoint th...

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4 Comments

  1. abujin

    Good basic training. Would like to have known more about where he obtained readings for” known good in our locale”

  2. mastertechmag

    Thanks for your inquiry abujin. Per Kerry, our contributing editor:
    “I arrived at these numbers looking at new MAF’s that I tested after I installed it and I also tested good units that kept the fuel trim number very close to 0%. I hope that answers the question. “

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