Turbo Problems: Symptoms, Causes and What to Check First When a turbo engine starts smoking, whistling or losing power, the turbo usually gets blamed first. Often it isn't the cause. A large share of turbos replaced as "failed" either had nothing wrong with... boost leaks compressor surge shaft play turbo diagnosis turbo problems turbochargers 23 Jul 2026 Turbocharger Maintenance and Troubleshooting