No. 11 Engine Stalls/Quits, Engine Runs Rough, Misses, Buck/Jerk, Hesitation/Stumble, Surges: Notes

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION & POSSIBLE CAUSE

11	Engine stalls/quits - acceleration/cruise Engine runs rough - acceleration/cruise Misses - acceleration/cruise Buck/jerk - acceleration/cruise/deceleration Hesitation/stumble - acceleration Surges - acceleration/cruise
DESCRIPTION	Engine stops unexpectedly at beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising. Engine speed fluctuates during acceleration or cruising. Engine misses during acceleration or cruising. Vehicle bucks/jerks during acceleration, cruising or deceleration. Momentary pause at beginning of acceleration or during acceleration Momentary minor irregularity in engine output
POSSIBLE CAUSE	A/C system improper operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Main relay intermittent malfunction Throttle body malfunction Engine overheating Spark plug malfunction Improper air/fuel mixture control operation Erratic signal to ignition coil Air cleaner restriction PCV valve malfunction Improper valve timing due to jumping out of timing belt Restriction in exhaust system Intermittent open or short in fuel pump circuit Inadequate fuel pressure Fuel line and/or fuel filter restriction or clogging Pressure regulator malfunction APP sensor misadjustment TP sensor misadjustment Fuel pump mechanical malfunction Fuel leakage from fuel injector Fuel injector clogging Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See BEFORE REPAIR PROCEDURE .) (See AFTER REPAIR PROCEDURE .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly 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.

Engine stalls/quits - acceleration/cruise
Engine runs rough - acceleration/cruise
Misses - acceleration/cruise
Buck/jerk - acceleration/cruise/deceleration
Hesitation/stumble - acceleration
Surges - acceleration/cruise

DESCRIPTION

Engine stops unexpectedly at beginning of acceleration or during acceleration.
Engine stops unexpectedly while cruising.
Engine speed fluctuates during acceleration or cruising.
Engine misses during acceleration or cruising.
Vehicle bucks/jerks during acceleration, cruising or deceleration.
Momentary pause at beginning of acceleration or during acceleration
Momentary minor irregularity in engine output

POSSIBLE CAUSE

A/C system improper operation
Erratic signal or no signal from CMP sensor
Air leakage from intake-air system parts
Purge solenoid valve malfunction
Improper operation of electronic throttle control system
EGR valve malfunction
Erratic signal from CKP sensor
Low engine compression
Vacuum leakage
Poor fuel quality
Main relay intermittent malfunction
Throttle body malfunction
Engine overheating
Spark plug malfunction
Improper air/fuel mixture control operation
Erratic signal to ignition coil
Air cleaner restriction
PCV valve malfunction
Improper valve timing due to jumping out of timing belt
Restriction in exhaust system
Intermittent open or short in fuel pump circuit
Inadequate fuel pressure
Fuel line and/or fuel filter restriction or clogging
Pressure regulator malfunction
APP sensor misadjustment
TP sensor misadjustment
Fuel pump mechanical malfunction
Fuel leakage from fuel injector
Fuel injector clogging
Intermittent open or short of MAF sensor, APP sensor, TP sensor and VSS
ATX malfunction (ATX)
Clutch slippage (MTX)

WARNING:

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
  (See BEFORE REPAIR PROCEDURE .)
  
  (See AFTER REPAIR PROCEDURE .)

CAUTION:

Disconnecting/connecting quick release connector without cleaning it may possibly 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.