Mazda 6 Service Manual: No.12 lack/loss of power-acceleration/cruise

No.11 engine stalls/quits, engine runs rough, misses, buck/jerk, hesitation/stumble, surges

No.13 knocking/pinging-acceleration/cruise

Other materials:

Mazda 6 Service Manual: Dsc hu/cm inspection
1. Remove the battery and battery bracket. 2. Disconnect the DSC HU/CM connector. 3. Connect the SST (49 G066 004) to the DSC HU/CM connector and harness side connector. 4. Inspect voltage referring the table below. Terminal Voltage Table (reference value) (Ignition switch is at ON, and conne ...

Mazda 6 Service Manual: Nonreturn valve inspection
1. Remove the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.) 2. Siphon the fuel from the fuel tank. Note Nonreturn valve is integrated in the fuel tank. The nonreturn valve is normally closed by the spring force. 3. Verify that the nonreturn valve is closed. If the nonretu ...