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: Engine Start Function When Key Battery is Dead
CAUTION When starting the engine by holding the transmitter over the push button start due to a dead key battery or a malfunctioning key, be careful not to allow the following, otherwise the signal from the key will not be received correctly and the engine may not start. Metal parts of ot ...

Mazda 6 Service Manual: Operating the Compact Disc (CD) Player
NOTE If a disc has both music data (CD-DA) and MP3/WMA/AAC files, playback of the two or three file types differs depending on how the disc was recorded. Inserting the CD Insert the CD into the slot, label-side up. The auto-loading mechanism will set the CD and begin play. NOTE There wi ...