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Rb20Det Very Strange Misfiring


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A million reasons. Fuel pump going soft. Stange fault with fuel pressure reg. Sudden change in the goodness of an oil control ring (oil into cylinder = less octane rating = knock). Maybe the knock sensor just crapped itself, and up until now it's been running on the knock maps in the ECU. Crapped out sensor means it can't hear knock and it's now running on the main maps and pinging away.

Keep going, there are a bunch more reasons.

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