No. 10 Low Idle/Stalls During Deceleration: Notes

POSSIBLE CAUSES DESCRIPTIONS

10	LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION	Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.
POSSIBLE CAUSE	Poor fuel quality Vacuum leakage Improper operation of electronic throttle control system Air leakage from intake-air system Intake-air system restriction EVAP control system malfunction Improper air/fuel mixture ratio control Erratic signal from CKP sensor Erratic signal from CMP sensor Accelerator position sensor or related circuit malfunction TP sensor or related circuit malfunction MAF sensor or related circuit malfunction Front and/or rear HO2S sensor or related circuit malfunction Brake switch or related circuit malfunction Neutral or clutch switch malfunction or related circuit malfunction Improper A/C magnetic clutch operation Inadequate fuel pressure (high or low pressure side) Suction control valve malfunction (built-in high pressure fuel pump) Relief valve malfunction (built-in delivery pipe) Fuel leakage Fuel line restriction Fuel filter clogging Incorrect fuel injection timing High pressure fuel pump malfunction Fuel injector malfunction Low engine compression Improper valve timing EGR system malfunction Vacuum leakage ECT sensor or related circuit malfunction Fuel pressure sensor or related circuit malfunction Injector driver module or related circuit malfunction 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 injury 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 AFTER REPAIR PROCEDURE ). (See BEFORE REPAIR PROCEDURE ). CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

LOW IDLE/STALLS DURING DECELERATION

DESCRIPTION

Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.

POSSIBLE CAUSE

Poor fuel quality
Vacuum leakage
Improper operation of electronic throttle control system
Air leakage from intake-air system
Intake-air system restriction
EVAP control system malfunction
Improper air/fuel mixture ratio control
Erratic signal from CKP sensor
Erratic signal from CMP sensor
Accelerator position sensor or related circuit malfunction
TP sensor or related circuit malfunction
MAF sensor or related circuit malfunction
Front and/or rear HO2S sensor or related circuit malfunction
Brake switch or related circuit malfunction
Neutral or clutch switch malfunction or related circuit malfunction
Improper A/C magnetic clutch operation
Inadequate fuel pressure (high or low pressure side)
Suction control valve malfunction (built-in high pressure fuel pump)
Relief valve malfunction (built-in delivery pipe)
Fuel leakage
Fuel line restriction
Fuel filter clogging
Incorrect fuel injection timing
High pressure fuel pump malfunction
Fuel injector malfunction
Low engine compression
Improper valve timing
EGR system malfunction
Vacuum leakage
ECT sensor or related circuit malfunction
Fuel pressure sensor or related circuit malfunction
Injector driver module or related circuit malfunction
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 injury 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 AFTER REPAIR PROCEDURE ).
  
  (See BEFORE REPAIR PROCEDURE ).
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.