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: Driving Tips
WARNING Do not let the vehicle move in a direction opposite to the direction selected by the selector lever: Do not let the vehicle move backward with the selector lever in a forward position, or do not let the vehicle move forward with the selector lever in the reverse position. Otherwise, t ...

Mazda 6 Service Manual: Thermostat
THERMOSTAT REMOVAL/INSTALLATION 1. Remove the plug hole plate. 2. Disconnect the negative battery cable. 3. Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS.) 4. Remove the drive belt. (See DRIVE BELT REPLACEMENT.) 5. Remove the washer tank. 6. Remove the P/S oil pump. Note ...