DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately stalls.

Was the Powertrain On-Board Diagnostic (OBD) System Check performed?

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Go to Step 2

Go to the Powertrain On Board Diagnostic (OBD) System Check

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

Was a bulletin found that addresses the symptom?

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Go to Step 20

Go to Step 3

Was visual/physical check performed?

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Go to Step 4

Go to Visual/Physical Checks

With the engine completely cool, compare Engine Coolant Temperature to Intake Air Temperature.

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

± 3°C(± 5°F)

Go to Step 8

Go to Step 5

1. Using a Scan Tool, display engine coolant temperature and note value.
2. Check the resistance of engine coolant temperature sensor using a J 39200 Digital Multimeter. Refer to the Temperature vs Resistance in for resistance specifications.

Is resistance value near the resistance for the temperature noted?

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Go to Step 7

Go to Step 6

Replace the ECT sensor. Go to Engine Coolant Temperature Sensor Replacement .

Is action complete?

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Go to Step 20

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Locate and repair high resistance or poor connection in the ECT signal circuit or the ECT sensor ground. Refer to Wiring Repair in Electrical Diagnosis.

Is action complete?

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Go to Step 20

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1. Check for faulty, plugged, or incorrectly installed PCV valve. Refer to Positive Crankcase Ventilation Valve .
2. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 9

1. Check for water or alcohol contaminated fuel. Go to Alcohol/Contaminants-in-Fuel Testing Procedure .
2. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 10

1. Check the fuel pressure. Refer to Fuel System Pressure Test .
2. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 11

1. Visually/Physically inspect secondary ignition wires. Refer to Ignition System to check for the following conditions:

•	Check all ignition wire resistances; should be less than the specified value.

•	Ignition wires for cross firing.

•	Ignition wires arcing to ground.

•	Ignition wires for improper routing.

Important:: Spraying the secondary ignition wires with a light mist of water may help locate an intermittent problem Ignition components will arc to ground when a secondary component is faulty.

2. If a problem is found, repair as necessary.

Was a problem found?

30000 ohms(30K ohms)

Go to Step 20

Go to Step 12

1. Check for proper ignition coil output voltage with a J 26792 spark tester:

-	Clip the spark tester to engine ground.

-	Connect one end of a spark plug wire to the spark tester; connect the other end of the spark plug wire to the coil being tested.

-	Connect one end of another spark plug wire to the other coil tower; connect the other end of the spark plug wire to ground.

-	Crank the engine while observing the spark tester; a crisp blue spark should be observed.

-	Repeat the above steps for each coil.

1. If adequate spark is not present at all coils, replace affected coil(s) as necessary. Go to Ignition Control Module Replacement .

Was a problem found?

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Go to Step 20

Go to Step 13

1. Remove spark plugs and check for wet plugs, cracks, wear, improper gap, burned electrodes, or heavy deposits. Refer to Ignition System.

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 found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 14

1. Check for loose ignition control module ground. Refer to Ground Distribution in Electrical Diagnosis.
2. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 15

1. Remove ignition coils and check the ignition coils for cracks or carbon tracking.
2. If a problem is found, replace affected coil(s) as necessary. Go to Ignition Control Module Replacement .

Was a problem found?

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Go to Step 20

Go to Step 16

1. Check ignition coil secondary resistance.
2. Replace any coil(s) which are not within the specified values. Go to Ignition Control Module Replacement .

Was a problem found?

5000 8000 ohms (5K 8K ohms)

Go to Step 20

Go to Step 17

1. Check IAC operation. Go to Idle Air Control (IAC) System Check .
2. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Go to Step 18

1. Check for the following engine mechanical problems:

•	Low compression. Refer to Engine Compression Test.

•	Worn or incorrect camshaft. Refer to Valve Train Diagnosis.

1. If a problem is found, repair as necessary. Refer to 3800 Engine On-Vehicle Service.

Was a problem found?

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Go to Step 20

Go to Step 19

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

•	Visual/physical inspection. Go to Visual/Physical Checks .

•	Scan tool data. Go to Engine Scan Tool Data List .

•	Freeze Frame data/Failure Records data.

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

1. If a problem is found, repair as necessary.

Was a problem found?

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Go to Step 20

Review technical bulletins

Operate the vehicle to duplicate conditions present when the original symptom was noted.

Is the symptom still present?

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Go to Step 3

System OK