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The BMW Range
3 Series
E46
O2 Sensor Control Range Block ??
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<blockquote data-quote="aidilj" data-source="post: 562199" data-attributes="member: 20536"><p>I would usually have pulsating RPM when the car is started when the engine is warm, this happen not only in idle but also when the car is moving. But after a while (I think after the DME decided that the O2 is gone) the RPM would be steady again.</p><p></p><p>Starting from cold is okay, because the DME knows the heater would take time to heat the sensor up. Without the O2 sensor, the car would operate in open loop mode making it less efficient in figuring out the ideal air-fuel mixture.</p><p></p><p>Yours could be unrelated, but this is the symptom of a dying O2 sensor. Follow bro b33mer recommendation.</p></blockquote><p></p>
[QUOTE="aidilj, post: 562199, member: 20536"] I would usually have pulsating RPM when the car is started when the engine is warm, this happen not only in idle but also when the car is moving. But after a while (I think after the DME decided that the O2 is gone) the RPM would be steady again. Starting from cold is okay, because the DME knows the heater would take time to heat the sensor up. Without the O2 sensor, the car would operate in open loop mode making it less efficient in figuring out the ideal air-fuel mixture. Yours could be unrelated, but this is the symptom of a dying O2 sensor. Follow bro b33mer recommendation. [/QUOTE]
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O2 Sensor Control Range Block ??
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