Tag Archives: M54

M54 detonation and rough idle caused by cheap eBay MAF sensor

The eBay sensor has a resistor and diode in place of the glass PCB found in the OEM part. Causes rough idle (stalled a few times) and loud pinging. My guess is it overestimates airflow, causing the ECU to inject more fuel than necessary. The old sensor reads 0 all the time, which means the […]