DEFINITION: The engine cranks OK, but does not start for a long time. The engine eventually runs or may start, but then immediately stalls.

Did you perform the 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 17

Go to Step 3

Did you perform a visual and physical check?

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Go to Step 4

Go to Symptoms .

Check the engine coolant temperature (ECT) sensor for being shifted in the value. With the engine completely cool, compare the engine coolant temperature to the intake air temperature (IAT).

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

+/-3°C (+/-5°F)

Go to Step 8

Go to Step 5

1. Display the engine coolant temperature on a scan tool.
2. Check the resistance of the engine coolant temperature sensor.
3. Refer to Temperature Versus Resistance - Engine Coolant Temperature Sensor for the resistance specifications.

Does the resistance correspond with the temperature?

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Go to Step 7

Go to Step 6

Replace the ECT sensor.

Did you complete the repair?

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Go to Step 17

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

Did you complete the repair?

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Go to Step 17

1. Check for a damaged, plugged, or incorrectly installed crankcase ventilation valve.
2. Check the following sensors for correct operation:

•	The heated oxygen sensor (HO2S)

•	The mass air flow (MAF) sensor

•	The throttle position (TP) sensor

•	The accelerator pedal position (APP) sensor

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

Was a problem found?

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Go to Step 17

Go to Step 9

Check for water or alcohol contaminated fuel. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .

Was a problem found?

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Go to Step 17

Go to Step 10

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

Was a problem found?

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Go to Step 17

Go to Step 11

1. Use the following procedure in order to check for the correct ignition coil output voltage:

1.1.	Clip the J 26792 spark tester to engine ground.

1.2.	Remove the coil pack from bank 1.

1.3.	Use the scan tool to enable the coil while observing the J 26792 spark tester. A crisp blue spark should be observed.

1.4.	Repeat the above steps for the bank 2 coil pack.

2. If an adequate spark is not present at all of the coils, repair as necessary.

Was a problem found?

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Go to Step 17

Go to Step 12

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

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Wet plugs

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Cracks

•	Excessive wear

•	Improper gap

•	Burned electrodes

•	Carbon tracking on the insulator

•	Heavy deposits. Refer to Ignition System Check .

Notice: Determine the cause of the oil or gas fouled spark plugs in order to avoid damage to the new spark plugs.

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

Was a problem found?

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Go to Step 17

Go to Step 13

1. Check the primary connections at the ignition coil assembly. Refer to Wiring Repairs or to Connector Repairs in Wiring Systems.
2. If a problem is present, repair the problem as necessary.

Was a problem found?

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Go to Step 17

Go to Step 14

1. Check the ignition coils for any cracks or carbon tracking.
2. If a problem is present, replace the ignition coil assembly.

Was a problem found?

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Go to Step 17

Go to Step 15

1. Check for the following engine mechanical concerns:

•	Sticking valves

•	A hydraulic valve lifter problem

•	Leaking cylinder head gaskets

•	A worn camshaft

•	An incorrect cam timing

•	A damaged timing belt

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

Was a problem found?

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Go to Step 17

Go to Step 16

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

•	Perform a visual/physical inspection.

•	Review the scan tool data

•	Review the Freeze Frame data

•	Inspect all of the electrical connections within a suspected circuit or system. Refer to Wiring Repairs in Wiring Systems.

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

Was a problem found?

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Go to Step 17

Go to Step 3

Operate the vehicle under the same conditions,as closely as possible, as when the original symptom occurred.

Is the original symptom still present?

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Go to Step 3

Go to Step 18

Are other driveability symptoms present?

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Go to Symptoms

System OK