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: General procedures
Wheels and Tires Removal/Installation The removal and installation procedures for the wheels and tires are not mentioned in this section. When a wheel is removed, tighten it to 88-118 N·m {9.0-12.0 kgf·m, 65.0-87.0 ft·lbf}. Power Steering Components Removal/Installation If any power steeri ...

Mazda 6 Service Manual: Troubleshooting procedure
Basic flow of troubleshooting DTC troubleshooting flow (on-board diagnostic) Diagnostic trouble codes (DTCs) are important hints for repairing malfunctions that are difficult to simulate. Perform the specific DTC diagnostic inspection to quickly and accurately diagnose the malfunction. The ...