Good morning. I know that this topic has been addressed here many times and I have read everything about it, but all the tips I found did not help with it. Situation: 2 weeks ago I was running on the highway and then pluupp was the power and I only came to 80 kmh or accelerated on it at snail speed. Procedure: I saw some solutions on the Internet and carried them out: -turbochargers completely changed with tube. -Zündkerzen changed (were slightly black) -low pressure ventilation valve changed -cylinder compression tested (all ok.) What else can it be, I didn’t notice any change to the advantage. Smart had made a error reading at the beginning, and that was it.. Turbo —> Errors —-> No pressure? Vll the mixing housing ??? Thank you already….. Smart fot two BJ ́99 ATM with 35 TKM 54 hp.