Kuga fluctuating cylinder pressure

Fluctuating cylinder pressures are a serious issue. If the pressure isn't consistent across all cylinders, it suggests an imbalance that could stem from several things. Have you noticed any engine knocking or unusual noises? It's crucial to rule out mechanical damage. A compression test across all cylinders would provide valuable data. Also, investigate the health of your turbocharger; a malfunctioning turbo could contribute to pressure inconsistencies.

Thanks for the detailed response! No obvious knocking, but I'll definitely get a compression test done. Regarding the turbocharger, is there a straightforward way to check its functionality without specialized equipment?

While a full diagnostic requires specialized tools, there are a few visual checks you can perform. Inspect the turbocharger's intake and outlet hoses for any signs of oil buildup, indicating potential seal failure. Also, examine the impeller (the spinning part inside the turbo) for any damage or excessive play. However, if you suspect a serious turbo issue, it's best to consult a professional; consequential damage to the engine, like the head gasket or piston rings, can be expensive.

Thanks a lot for the detailed help! It turned out the cylinder pressure fluctuation was a consequential error resulting from a broken wire in the engine control unit. The mechanic repaired the wire, and the problem was solved without further costs. The car runs like new again!