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Re: Running lean cold intermittently?
Posted to Emissions Forum on 9/15/2018 1 Reply

As is the tendency of lean conditions...if it improves greatly at 2500-3k rpm from what it was at idle, typically you check for vacuum (external OR internal) leaks as your 1st go, followed by MAF efficiency perhaps as a 2nd. If its identically bad at both spee... Login to read more.

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