Inspection/Test
| Action
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DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.
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Preliminary
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• | Verify that the driver is using the correct starting procedure as described in the owners manual. |
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Sensor/System
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• | Verify that the engine coolant temperature (ECT) sensor is not shifted in value. Refer to
Temperature Versus Resistance
for resistance specifications. |
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Fuel System
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• | Verify there is adequate fuel. |
• | A faulty in-tank sender check valve allows the fuel in the lines to drain back to the tank after the engine stops. Refer to
Fuel System Diagnosis
. |
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Ignition System
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• | Remove the spark plugs and inspect for the following conditions: |
• | Determine the cause of the conditions before replacing the spark plugs. |
• | Inspect for loose ignition coil grounds. |
• | Inspect the ignition coils for cracks or carbon tracking. |
• | Soak the secondary ignition with water may help locate an intermittent problem. Ignition voltage will arc to ground when a secondary component is faulty. |
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Engine Mechanical
| Inspect for the following conditions:
• | Broken or worn valve springs |
• | Combustion chambers for excessive carbon buildup--Clean the chambers using top engine cleaner. Follow the instructions on the can. |
• | Incorrect or damaged basic engine parts--Inspect the following components: |
Inspect for excessive crankshaft endplay that will cause the crankshaft position (CKP) sensor reluctor wheel to move out of alignment with the CKP sensor. Refer to
Crankshaft and Bearing Cleaning and Inspection
in Engine Mechanical. This could result in any of the following conditions:
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Additional
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• | Inspect the air intake ducts for being collapsed, damaged, loose, improperly installed, or leaking, especially between the mass air flow (MAF) sensor and the throttle body. |
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