u/Besiiiiii_

I have a Ford Focus 3 with 1.6 TDCi (115 hp), idon’t have any acceleration issues; the engine is still smooth. The car can reach 200 km/h even after 220,000 km.

The problem I’m experiencing is that sometimes the idle rises to 900 rpm instead of 780–800, even when the engine is warm. I’m not sure if I’m on the right track, but I’d like to test the MAF sensor.

Does anyone know how to test a Mass Air Flow sensor on a 1.6 TDCi engine? I tried unplugging the cable while the car was idling, but nothing happened.