Definition: The engine continues to run after key is turned OFF, but runs very rough. If the engine runs smooth, check the ignition switch and the adjustment.

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 you find a bulletin that addresses the symptom, correct the condition as instructed in the bulletin.

Did you find a bulletin that addresses the symptom?

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Go to Step 6

Go to Step 3

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

Did you perform a visual/physical check?

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Go to Step 4

Go to Important Preliminary Checks

1. Check for any leaking fuel injectors. Refer to 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 6

Go to Step 5

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

•	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 6

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

Does the system now operate properly?

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System OK

Go to Step 2