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Engine Cranks but Does Not Run: Description

WARNING: This page is about a different car, the 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that causes an engine not to start. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis.

The Engine Cranks but Does Not Run diagnostic table assumes the following:

Engine Cranks but Does Not Run

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to DIAGNOSTIC SYSTEM CHECK - VEHICLE
2
  1. Turn ON the ignition, with the engine OFF.
  2. Observe the DTC Information with a scan tool.
Does the scan tool display DTCs P0017, P0201, P0202, P0203, P0204, P0335, P0336, P0601, P0602, P0603, P0604, P0606, P0607, P0641, P0651, P1621, P1630, P1631, P1680, P1681, or P2610?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 3 
3 Does the scan tool display any body control module (BCM) vehicle theft deterrent (VTD) DTCs? - Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 4 
4
  1. Turn ON the ignition, with the engine OFF.
  2. Probe both sides of the engine control module (ECM)/ engine coolant temperature (ETC) fuse with a test lamp connected to a good ground.
Does the test lamp illuminate on at least one side of the fuse?		 - Go to Step 5  Go to Powertrain Relay Diagnosis 
5 Command the fuel pump ON with a scan tool.
Does the fuel pump operate?		 - Go to Step 6  Go to Fuel Pump Electrical Circuit Diagnosis 
6
  1. Turn OFF the ignition.
  2. Remove the ignition coil housing.
    3. IMPORTANT: Not grounding the ignition coil housing, may cause erratic spark.
  3. Install a jumper wire from the ignition control module to a good ground.
  4. Install the J 36012-A  Ignition System Diagnostic Harness.
  5. Install a J 26792  Spark Tester on #1 spark plug jumper wire.
  6. Ground #4 (companion to #1) spark plug jumper wire.
  7. Crank the engine with the remaining spark plug jumper wires connected.
  8. Repeat the above steps by installing the spark tester on #4 and grounding #1. Do the same for #2 and #3 spark plugs. Ensure that the companion wire is grounded.
Does the spark tester spark on all cylinders?		 - Go to Step 7  Go to Electronic Ignition (EI) System Diagnosis 
7
  1. Turn OFF the ignition.
  2. Disconnect an injector connector.
  3. Install the J 34730-405  Injector Test Lamp to the injector connector.
  4. Attempt to start the engine.
Does the test lamp blink while the engine is cranking?		 - Go to Step 8  Go to Fuel Injector Circuit Diagnosis 
8
  1. Turn OFF the ignition.
  2. Install a fuel pressure gage. Refer to Fuel Pressure Gage Installation and Removal .
  3. Turn ON the ignition, with the engine OFF.
  4. Command the fuel pump ON with a scan tool.
Is the fuel pressure within the specified range while the fuel pump is operating?		 345-414 kPa (50-60 psi) Go to Step 9  Go to Fuel System Diagnosis 
9 Inspect for the following conditions:
Did you complete the action?		 - Go to Step 10  -
10
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Attempt to start the engine.
Does the engine start then continue to run?		 - Go to Step 11  Go to Step 2 
11
  1. Allow the engine to reach operating temperature.
  2. Observe the DTC information with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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