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Re: Lean code caused by exhaust valve being held open
Posted to Technical Theory Forum on 5/19/2004 3 Replies

I think you need to rethink some of that.

The O2 input is very powerful in regard to fuel trims. I think the fact that it an ignition misfire allows the HC's to cease the catalyst that happens in the O2 and causes it not to drive the fuel trims up.

With th... Login to read more.

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