hi !
i got a problem with fuel mileage on a 99.5 a4 1.8,no code,my maf is between 3 and 4 g/s on idling but seems to fluctuate a lot on the road(no symptom),.fuel trim are ok short term and long term (around 0)but can't get 100% of engine load stuck at 75% max,no mods on the car.it could be the maf but not sure if somebody knows please help.thanks!