Ford Focus Forum, Ford Focus ST Forum - View Single Post - Blown engine at 35000 miles
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Old 05-25-2013, 08:52 PM   #14
StingRay
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How do you guys know the engine is running lean? When I had my SE I'd monitor the factory Wideband and during a WOT pull AFRs would be around 12.5:1, right where they're supposed to be on a DI engine.
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