NO.3 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [WL-3]
id0103b5912300
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3
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Hard to start/long crank/erratic start/erratic crank
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DESCRIPTION
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• The starter cranks the engine at normal speed but the engine requires excessive cranking time before starting.
• The battery is in normal condition.
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POSSIBLE CAUSE
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• Poor fuel quality
• Starting system malfunction
• Intake-air system restriction
• Incorrect idle speed
• Engine overheating
• Glow system malfunction
• Fuel filter clogging
• Fuel line restriction
• Fuel leakage
• Exhaust system restriction
• Incorrect fuel injection timing
• Injection pump malfunction
• Injection nozzle malfunction
• Low engine compression
• Injection pump EPROM malfunction
• EGR system malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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• Inspect for the following:
• Are all items normal?
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Yes
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Go to the next step.
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No
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Service if necessary.
Repeat Step 1.
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2
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• Is the engine overheating?
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Yes
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Go to symptom troubleshooting “NO.13 COOLING SYSTEM CONCERNS-OVERHEATING.”
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No
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Go to the next step.
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3
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• Connect the M-MDS to DLC.
• Turn the engine switch to the ON position (Engine off).
• Retrieve any DTCs.
• Is a DTC displayed?
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Yes
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DTC is displayed:
• Go to the appropriate DTC test.
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No
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No DTC is displayed:
• Go to the next step.
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4
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• Does the engine start normally after warm-up?
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Yes
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Inspect the glow plug and the glow plug relay.
Replace any malfunctioning part if necessary.
If the glow system is normal, go to the next step.
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No
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Go to the next step.
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5
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• Is the idle speed correct?
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Yes
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Go to the next step.
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No
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Adjust idle speed.
(See ENGINE TUNE-UP [WL-3])
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6
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• Is there any restriction in the exhaust system?
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Yes
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Repair or replace if necessary.
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No
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Go to the next step.
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7
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• Inspect for fuel leakage from the fuel pipe.
• Is any fuel leakage found on the fuel pipe?
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Yes
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Repair or replace if necessary.
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No
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Go to the next step.
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8
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• Measure engine compression.
• Is compression normal?
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Yes
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Go to Step 10.
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No
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Go to the next step.
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9
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• Inspect timing belt for the following:
• Is the timing belt normal?
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Yes
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Inspect for the following:
• Burnt valve
• Worn piston, piston ring or cylinder
• Damaged cylinder head gasket
• Damaged valve seat
• Worn valve stem or valve guide
Repair or replace if necessary.
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No
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If the timing is incorrect, adjust the timing
If the timing belt is not normal, replace the timing belt.
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10
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• Inspect injection timing.
• Is injection timing normal?
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Yes
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Go to the next step.
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No
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Inspect the TCV.
If the TCV is normal, adjust the injection timing.
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11
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• Remove and inspect the injection nozzle for the following:
• Is the injection nozzle normal?
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Yes
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Inspect the following:
• Starting signal (PCM terminal 1U)
If normal, remove and inspect the injection pump.
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No
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Repair or replace the injection nozzle.
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12
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• Verify the test results. If normal, return to the diagnostic index to service any additional symptoms.
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