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    Featured in PTEN: Pinpoint emissions failure

    Feb. 18, 2014
    In diagnosing a 1994 Toyota 4Runner, one must perform a test to allow easy answers to direct the diagnostic path.

    To diagnose a 1994 Toyota 4Runner that failed a state emissions test for high N0x, a technician must follow the same testing logic of later OBD II vehicles and must verify converter operating and everything.else, according to an article in the February Professional Tool & Equipment News. Read how to proceed..

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