Section 03 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
ENGINE HARD TO START
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Defective idle bypass valve
(
4-TEC models
)
Refer to ENGINE MANAGEMENT
Wrong TPS zero setting (
fuel injection
models
)
Refer to ENGINE MANAGEMENT
Throttle cable adjustment
(
fuel injection models
)
Refer to ENGINE MANAGEMENT
Temperature too low for available
battery capacity
Battery capacity is not sufficient for cold
temperature
Air lock in fuel rail
(
RFI and 4-TEC models
)
Refer to ENGINE MANAGEMENT
Water in intake system (defective MAP
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
Check cylinder compression
Check for cylinder head leaks
Mechanical engine failure
Check starting system
Spark plug faulty, fouled or worn out Check spark plug condition
Check fuel pump operation. Refer to
ENGINE MANAGEMENT
Low fuel pressure
(
fuel injection models
)
Check fuel pressure regulator. Refer to
ENGINE MANAGEMENT
Check air/fuel rail. Refer to ENGINE
MANAGEMENT
Check air compressor system. Refer to
ENGINE MANAGEMENT
Low air pressure (
DI models
)
Check RAVE valve for leaks
ENGINE STARTS BUT RUNS ONLY AT IDLE SPEED
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
The system is in limp home mode
(
fuel injection models
)
Refer to ENGINE MANAGEMENT and
check the fault codes
Broken or loose throttle cable
Change/readjust
52 smr2004-Complete Line Up