What are the symptoms of 1. TSI piston failure?
Common symptoms are a rough idle, engine misfire fault codes and lack of power when accelerating. A compression check usually shows one- or two-cylinder compressions to be very low. It is only by disassembly of the engine that you find pistons have cracked or broken around a ring land. Performing a compression test helps in identifying the damaged engine’s piston rings. While the high compression levels indicate the presence of damaged valve seals, low compression levels indicate worn piston rings.