Mazda CX-9 Grand Touring 2009 Manual page 1343

POSSIBLE
CAUSE
DIAGNOSTIC PROCEDURE
NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK,
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Restriction in exhaust system
Intermittent open or short circuit in fuel body pump circuit
Inadequate fuel pressure
Fuel pump mechanical malfunction
Check valve (two-way) malfunction integrated with fuel tank
Fuel leakage from fuel injector
Fuel injector clogging
Fuel line restriction or clogging
Pressure regulator malfunction (built-in fuel pump unit)
Erratic signal form APP sensor
Erratic signal form TP sensor
Intermittent open or short circuit of MAF sensor, TP sensor, APP sensor and
VSS
ATX malfunction
Loose attaching bolts or worn engine mounts
WARNING:
The following troubleshooting flow chart contains the fuel system diagnosis
and repair procedures. Read the following warnings before servicing the fuel
system:
Fuel vapor is hazardous. It can easily ignite, causing serious injury and
damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and cause
serious injuries or death and damage. Fuel can also irritate skin and
eyes. To prevent this, always complete "BEFORE SERVICE
PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this
manual.
(See BEFORE SERVICE PRECAUTION [MZI-3.7] .)
(See AFTER SERVICE PRECAUTION [MZI-3.7] .)
CAUTION:
Disconnecting/connecting quick release connector without cleaning it
may cause damage to fuel pipe and quick release connector. Always
clean quick release connector joint area before
disconnecting/connecting, and make sure that it is free of foreign
material.