Motor Benzina 1.8 T la Audi TT Mk1 (8N) - diverse probleme si rezolvari

Nu reusesc sa-i dau de cap si e frustrant.

Imi da eroarea:
17544/P1136/004406 - Fuel Trim: Bank 1 (Add): System too Lean

Am verificat tot ce scire mai jos:

Check Mass Air Flow (MAF) Sensor
Check Fuel Pressure Regulator
Check Fuel Pump
Check Intake/Exhaust System for Leaks
Check Secondary Air Injection for Leaks
Check Vacuum Lines for Leaks

Am schimbat furtunele vietii care erau plesnite, am pus coliere noi pt turbo.
Am imprumutat piese de la preteni (MAF)
Schimbat...

Motor Benzina 1.8 T la Audi TT Mk1 (8N) - diverse probleme si rezolvari