Mazda 6 Service Manual: No.6 cranks normally but will not start

No.5 engine stalls-after start/at idle

No.7 slow return to idle

Other materials:

Mazda 6 Service Manual: Valve clearance inspection
1. Disconnect the negative battery cable. 2. Remove the tire (RH). 3. Remove the splash shield (RH). 4. Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION.) 5. Remove the high-tension lead. 6. Remove the oil control valve (OCV) connector. 7. Remove the ventilation hose. 8. Remove th ...

Mazda 6 Service Manual: Heater core inspection
1. Remove the A/C unit. (See A/C UNIT REMOVAL/INSTALLATION.) 2. Remove the heater core from the A/C unit. 3. Inspect for cracks, damage, and coolant leakage. If any problems are found, replace the heater core. 4. Inspect for bent fins. If any are bent, use a flathead screwdriver to stra ...