#2008 Audi S5 4.2 (186,000 km) that I hope you can help with.

2 messages · Page 1 of 1 (latest)

vast light
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About 1-2 days after washing the engine, I started experiencing misfires in cylinder 2, but only under load, specifically when hitting around 3500+ RPM with about 20-30% throttle. The car runs smoothly without misfires when driven gently without pushing it.

Here’s what I’ve done so far:

Replaced all spark plugs and coils
Changed the injector in cylinder 2
Performed an oil service and installed a new battery
Replaced the engine mount on the driver's side
Conducted a compression test which showed good results
Despite these changes, the misfire in cylinder 2 persists. I even tried relocating the plugs and coils, but the problem remains. Any insights or advice you could offer would be greatly appreciated!

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2008 Audi S5 4.2 (186,000 km) that I hope you can help with.