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Re: 2008 Subaru Imprezza WRX failed TSI
Posted to Emissions Forum on 3/14/2014

Shannon,

Good -Stuff...it appears that the PCM is commanding the rich AF-mixture/seeing it/and doesn't see a problem with it???

Perhaps there is an issue with the PCM, especially with positive-trims....it doesn't recognize that the engine is over-fueled..... Login to read more.