I've cleaned the MAF three times in the past 5-6 months, about a month ago last time. Still no improvement. On the VAG you can check if all the sensors are working within parameters right? I guess I won't know exactly whats going on until then. Either way the car has 130k so I'm changing the precat sensors.

 

You can also monitor the MAF sensor as well as the O2 sensors, the O2 sensors are much easier to identify malfunctioning though. What you would want to look for in the MAF is the g/s at idle and WOT.
At idle it shouldn't be any higher than 3.2 g/s, when flooring it you want to look for spiking numbers and fluxuations.

 

Is there a way to measure voltage or resistance on the MAF using a digital multimeter? I did it with the precat sensors but couldn't get a reading with the MAF.

 

Audi doesn't have a test procedure for it in elsa web, i only see tests for measuring voltage to the sensor, ground, and signal, you can't measure resistance of the sensor itself. Or at least i don't have a spec for it.

 

I see. Well thanks for the help. I'll get the car on a VAG and see what happens from there.