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Re: Very ' rich ' off idle in closed loop- fine in open
Posted to Technical Theory Forum on 5/8/2012 5 Replies

Would the poor-performing engine generate a weak vacuum/elevated MAP-voltage perceived as "LOAD" by the PCM...compensated for by enrichment of the base inj-pw...then, in response to the HO2S-input, generate a negative-trim value? Login to read more.

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