250,000 km Stutters when over half throttle, turbo gauge goes into red. been like that for over 2 years been driving it like that just under the point. Cars had regular maintenance, no big repairs in its life. Yesterday check engine light came on, car was running but at full throttle it would climb in speed slowly even at higher rpm. Pulled over and shut it off for 15 mins, same problem but today bo check engine light and it’s driving like normal with stutter past 50% throttle. Before I buy a code reader wondering if any of you could give me an ideas, I am mechanically challenge forgive me if it seems simple.
It’s acceptable under certain conditions for the turbo gauge to go into the red, but surely not as a continuous situation.
Best case scenario: there’s a dry rotten hose at the turbocharger or intercooler. OK case scenario: the bypass valve is shot. Worst case scenario: the turbo was killed by running it in overboost for two years.