Definition: The engine cranks OK, but the engine will not start for a long time. The engine will eventually run, or may start, but then the engine immediately dies.

Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?

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Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

1. Perform a bulletin search.
2. If a bulletin that addresses the symptom is present, correct the condition as instructed in the bulletin.

Was a bulletin found that addresses the symptom?

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Go to Step 19

Go to Step 3

Check to see if the driver is using the correct starting procedure as described in the owner's manual. Educate the driver of the correct starting procedure.

Does the driver know the correct starting procedure?

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Go to Step 4

Go to Step 19

Perform the careful visual/physical checks as described at the start of Symptoms section.

Is the action complete?

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Go to Step 5

Go to Important Preliminary Checks

1. Check the Engine Coolant Temperature (ECT) sensor for being shifted in value.
2. With the engine completely cool, compare the engine coolant temperature to the intake air temperature.

Are the ECT and IAT within the specified value of each other?

± 3°C (± 5°F)

Go to Step 9

Go to Step 6

1. Using a Scan Tool, display the engine coolant temperature and record the value.
2. Check the resistance of the engine coolant temperature sensor. Refer to DTC P0118 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage for Diagnostic Support for the resistance specifications in the Temperature vs. Resistance Table.

Is the resistance value near the resistance for the temperature indicated?

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Go to Step 8

Go to Step 7

Replace the ECT sensor.

Is the action complete?

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Go to Step 19

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Locate and repair the high resistance or poor connection in the ECT signal circuit or the ECT sensor ground.

Is the action complete?

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Go to Step 19

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1. Check for a proper operation of the MAP sensor.
2. Repair the MAP sensor if necessary. Refer to Manifold Absolute Pressure Sensor Output Diagnosis .

Was a repair necessary?

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Go to Step 19

Go to Step 10

1. Check for a proper operation of the TP sensor.
2. Repair the TP sensor as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 11

1. Check for water or alcohol contaminated fuel using J  39383-A.
2. If a problem is present, repair the problem as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 12

1. Perform the procedure in Fuel System Diagnosis .
2. If a problem is present, repair the problem as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 13

1. Check for proper ignition voltage output with spark plug jumper wires J 36012 and spark tester J 26792.
2. If a problem is present, repair the problem as necessary.

Was a problem found?

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Go to Step 19

Go to Step 14

Notice: If spark plugs are gas or oil fouled, determime the cause of the fouling before replacing the spark plugs in order to avoid damage to the new spark plugs.

1. Remove the spark plugs. Check for the following conditions:

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Wet plugs

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Cracks

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Wear

•	Improper gap

•	Burned electrodes

•	Heavy deposits

2. If a problem is present, repair the problem as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 15

1. Check for a loose ignition control module ground.
2. If a problem is present, repair the problem as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 16

1. Check the IAC operation. Perform the procedure in DTC P0506 Idle Speed Low diagnostic table.
2. If a problem is present, repair the problem as necessary.

Was a repair necessary?

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Go to Step 19

Go to Step 17

Check for the following Engine Mechanical problems:

Was a problem present?

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Go to Step 19

Go to Step 18

1. Review all of the diagnostic procedures within this table.
2. If all of the procedures have been completed and no malfunctions are present, review/inspect the following items:

•	Visual/physical inspection

•	The scan tool data

•	All of the electrical connections within a suspected circuit and/or system.

3. If a problem is present, repair the problem as necessary.

Is the action complete?

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Go to Step 19

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Operate the vehicle within the conditions under which the original symptom was noted.

Does the system now operate properly?

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System OK

Go to Step 2