Section 03
TROUBLESHOOTING
Subsection 01
(TROUBLESHOOTING CHART)
03-01-4
SMR2002-058_03-01A.FM
ENGINE HARD TO START
ENGINE STARTS BUT RUNS ONLY AT IDLE SPEED
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• Defective idle bypass valve
(
4-TEC models
)
• Refer to ENGINE MANAGEMENT
• Wrong TPS zero setting
(
4-TEC models
)
• Refer to ENGINE MANAGEMENT
• Wrong throttle body mechanical ad-
justment of cable
• Refer to ENGINE MANAGEMENT
• Temperature too low for available
battery capacity
• Battery capacity is not sufficient for cold
temperature
• Air lock in fuel rail (
4-TEC models
)
• Refer to ENGINE MANAGEMENT
• Water in intake system (defective
sensor) (
4-TEC models
)
• Check and remove water
• Refer to intake system in ENGINE
MANAGEMENT
• Water in fuel reservoir or
contaminated fuel
• Flush reservoir and refill with fresh gas
• Mechanical engine failure
• Check cylinder compression
• Check for cylinder head leaks
• Check starting system
• Spark plug faulty, fouled or worn out • Check spark plug condition
• Low fuel pressure
• Check fuel pump operation. Refer to
ENGINE MANAGEMENT
• Check fuel pressure regulator. Refer to
ENGINE MANAGEMENT
• Low air pressure (
DI models
)
• Check air/fuel rail. Refer to ENGINE
MANAGEMENT
• Check air compressor system. Refer to
ENGINE MANAGEMENT
• Check RAVE valve for leaks
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
• The system is in limp home mode
• Refer to section ENGINE and check the
fault codes in the EMS ECU
(
4 TEC models
) or MPEM or
(
DI models
)
• Broken or loose throttle cable
• Change/readjust
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Содержание GTX 4-TEC 5573 2002
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