Mazda 6 Service Manual: No.7 slow return to idle

No.6 cranks normally but will not start

No.8 engine runs rough/rolling idle

Other materials:

Mazda 6 Service Manual: Idle air control (iac) valve inspection
Note Perform the following inspection only when directed. Operation Test Carry out the Idle Air Control Inspection. (See Idle Air Control System Inspection.) If not as specified, perform the further inspection for the IAC valve. Resistance Inspection 1. Disconnect the negative batt ...

Mazda 6 Service Manual: Fuel line pressure inspection
Warning Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death. Fuel can also irritate skin and eyes. To prevent this, always complete the BEFORE REPAIR PROCEDURE. (See BEFORE REPAIR PROCEDURE.) Caution Disconnecting/connecting the quick r ...