Section 03
TROUBLESHOOTING
Subsection 01
(TROUBLESHOOTING CHART)
03-01-6
SMR2002-058_03-01A.FM
ENGINE MISFIRES, RUNS IRREGULARLY (cont’d)
ENGINE CONTINUALLY BACKFIRES
ENGINE DETONATION OR PINGING
Start but run poorlys
• Check spark plug condition, check
fault codes in the EMS ECU or MPEM
memory, check fuel pressure, check
RAVE valves operation
• Check, refer to section ENGINE
MANAGEMENT. If some work has
been performed on the unit, make sure
injector wire connectors were not
mixed. Refer to the wiring diagram for
wire colors and positions
Also fuel injection
misinjecting
• Bent or missing tooth on encoder
wheel
• Injector wiring reversed
• Damaged fuel injector
• Check, refer to ENGINE
MANAGEMENT under component
inspection and adjustment
• Check with wiring diagram
• Check, refer to ENGINE MANAGEMENT
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Weak spark
• Fouled, defective spark plugs
• Clean/replace
Spark plugs
• Ignition coil leads or wiring reversed
• Check with wiring diagram
Ignition timing/TDC setting
• Incorrect setting (
DI models
)
• Check/reset, refer to section
ELECTRICAL SYSTEM
• Defective encoder wheel
• Check, refer to section ENGINE
MANAGEMENT
Engine
• Intake or exhaust valve(s) leak
(
4-TEC models
)
• Pressure check engine, refer to section
ENGINE
OTHER OBSERVATION
POSSIBLE CAUSE
REMEDY
Ignition
• Timing too far advanced
• Check/reset
• Spark plug heat range too high
• Check/change to correct range
Engine/exhaust high
temperature
• Engine overheats and exhaust over-
heats
• Check, see engine overheats
• Fuel octane too low of poor quality
• KS disconnected or faulty
• Bad KS connection
• Bad Kostal connection (on engine)
• Use good quality fuel
• Check, refer to ENGINE MANAGEMENT
• Check, refer to ENGINE MANAGEMENT
• Check, refer to ENGINE MANAGEMENT
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Содержание GTX 4-TEC 5573 2002
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