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: Fuel-Filler Lid and Cap
WARNING When removing the fuel-filler cap, loosen the cap slightly and wait for any hissing to stop, then remove it: Fuel spray is dangerous. Fuel can burn skin and eyes and cause illness if ingested. Fuel spray is released when there is pressure in the fuel tank and the fuel-filler cap is re ...

Mazda 6 Service Manual: Front crossmember removal/installation
1. Remove the under cover. 2. Remove the splash shield. 3. Remove the front auto leveling sensor. (See FRONT AUTO LEVELING SENSOR REMOVAL/INSTALLATION.) 4. Remove the transverse member. (See TRANSVERSE MEMBER REMOVAL/INSTALLATION.) 5. Remove the steering gear and linkage, and pipe assembly i ...