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International Automotive Technicians Network
Re: Pre-OBD-II GM Torque Converter Lockup Diag
Posted to Technical Discussion Forum on 10/24/2007

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YES.

Try scoping or graphing the 02 sensor voltage (no scan tool). If it is smooth when the problem occurs, then it is not missing. If it has lots of hash, only when the problem occurs, then it is ... Login to read more.