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Re: O2 sensors what realy makes them switch rich to lean???
Posted to Technical Theory Forum on 1/4/2001 15 Replies

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Robert, the PCM is constantly changing the pulse width even at idle, although it is only a few milliseconds. The short term fuel strategy of the PCM constantly is driving the system "rich and lean" to... Login to read more.

15 Replies Received (View Replies)