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Re: Failed emissions

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Larhal

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Re: Failed emissions – 17-01-2025,08:05 AM

Originally Posted by Crasher

The crankcase check valve in the breather system fails but this causes a poor idle so I would suspect a small PCV air leak

Thank You Crasher,

This is where I was going as I smell a little burning smell in the exhaust, I will revert once I change it.

2002 A4 B6 1.8T Saloon. Stage 1 tune, BSR exhaust, B7 320MM Brakes Brembo Disks and pads, SS brake hoses, Valeo SMF HD clutch.

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Thread: Failed emissions

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