Start/Long Crank/Erratic Start/Erratic Crank: Notes

POSSIBLE CAUSES DESCRIPTIONS

4	HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK
DESCRIPTION	Starter cranks the engine at normal speed but the engine requires excessive cranking time before starting. Battery is operating normally
POSSIBLE CAUSE	Vacuum leakage Poor fuel quality Starting system malfunction Erratic signal to ignition coils Spark plug malfunction Air leakage from intake-air system Improper air/fuel mixture ratio control Incorrect fuel injection timing Erratic signal from CKP sensor Erratic signal from CMP sensor Front and/rear HO2S sensor or related circuit malfunction ECT sensor or related circuit malfunction MAF sensor or related circuit malfunction Intake-air system restriction Improper operation of electronic throttle control system PCV valve malfunction Inadequate fuel pressure (high or low pressure side) Relief valve malfunction (built-in delivery pipe) Spill valve control solenoid valve malfunction (built-in high pressure fuel pump) Fuel filter clogging Fuel line restriction Fuel leakage Fuel pump (low-side) resister or related circuit malfunction Fuel injector malfunction Fuel pressure sensor malfunction High pressure fuel pump malfunction Exhaust system or three-way catalytic converter restriction EGR valve malfunction Purge solenoid valve malfunction Low engine compression Improper valve timing 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 BEFORE REPAIR PROCEDURE ). (See AFTER 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.

HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK

DESCRIPTION

Starter cranks the engine at normal speed but the engine requires excessive cranking time before starting.
Battery is operating normally

POSSIBLE CAUSE

Vacuum leakage
Poor fuel quality
Starting system malfunction
Erratic signal to ignition coils
Spark plug malfunction
Air leakage from intake-air system
Improper air/fuel mixture ratio control
Incorrect fuel injection timing
Erratic signal from CKP sensor
Erratic signal from CMP sensor
Front and/rear HO2S sensor or related circuit malfunction
ECT sensor or related circuit malfunction
MAF sensor or related circuit malfunction
Intake-air system restriction
Improper operation of electronic throttle control system
PCV valve malfunction
Inadequate fuel pressure (high or low pressure side)
Relief valve malfunction (built-in delivery pipe)
Spill valve control solenoid valve malfunction (built-in high pressure fuel pump)
Fuel filter clogging
Fuel line restriction
Fuel leakage
Fuel pump (low-side) resister or related circuit malfunction
Fuel injector malfunction
Fuel pressure sensor malfunction
High pressure fuel pump malfunction
Exhaust system or three-way catalytic converter restriction
EGR valve malfunction
Purge solenoid valve malfunction
Low engine compression
Improper valve timing
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 BEFORE REPAIR PROCEDURE ).
  
  (See AFTER 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.