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Re: pre cat HC, how much is too much
Posted to Emissions Forum on 7/7/2002

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Did well at 2500 with 3PPM HC and .02 CO. Failed idle with 131 PPM HC and .11% CO. Pre cat HC at idle is about 350 to 400 PPM and CO is about 6% or so. Off idle HC drops below 100 and CO also drops so... Login to read more.