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Re: Why would a failed o2 sensor cause no start on 99 Ranger ???
Posted to Technical Discussion Forum on 10/12/2001 1 Reply

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Scott,

During cranking (less than 350-400 rpm), fuel pulsewidth is only a function of engine coolant temp (ECT) with a correction for BARO. The O2 sensors, long term fuel trim, and short term fuel t... Login to read more.

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