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Engine Cranks but Does Not Run: Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. 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 to not start. The diagnostic table directs the service technician to the appropriate system diagnosis. The diagnostic table assumes the following conditions are met:

Engine Cranks but Does Not Run

Step Action Values Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Powertrain Control Module (PCM) Connector End Views  or  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check-Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls
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 P0101, P0108, P0230, P0335, P0336, P0601, P0602, P0604, P0606, P0641, P1626, or P1631?		 - Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3 Does the scan tool display any body control module (BCM) or vehicle theft deterrent (VTD) DTCs? - Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent Go to Step 4 
4
  1. Turn ON the ignition, with the engine OFF.
  2. Probe both sides of the fuses located in the underhood electrical center listed below using a test lamp connected to ground.
    • INJR 1
    • INJR 2
Does the test lamp illuminate on at least one side of each fuse?		 - Go to Step 5  Go to Ignition 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. Disconnect a spark plug wire.
  3. Install J 26792  Spark Tester.
  4. Attempt to start the engine.
Does the spark tester spark?		 - Go to Step 7  Go to Electronic Ignition (EI) System Diagnosis 
7
  1. Turn OFF the ignition.
  2. Install a fuel pressure gauge. Refer to Fuel Pressure Gage Installation and Removal .
    3. IMPORTANT: You may need to command the fuel pump ON a few times in order to obtain the highest possible fuel pressure.
  3. Turn ON the ignition, with the engine OFF.
  4. Command the fuel pump ON with a scan tool.
  5. Observe the fuel pressure while the fuel pump is operating.
Is the fuel pressure within the specified range?		 379-427 kPa
(55-62 psi)		 Go to Step 8  Go to Fuel System Diagnosis 
8 Inspect for the following conditions:
  • Collapsed air intake duct
  • Restricted air filter element-Refer to Air Cleaner Assembly Replacement .
  • Spark plugs for being fouled-Refer to Spark Plug Inspection . If the spark plugs are fouled, determine what caused the condition.
  • Engine mechanical condition, for example, broken timing chain, low compression-Refer to Engine Compression Test in Engine Mechanical.
  • Restricted exhaust system-Refer to Restricted Exhaust in Engine Exhaust
  • An engine coolant temperature (ECT) sensor that has shifted in value-Refer to Temperature vs Resistance .
  • Compare the MAP parameter to another vehicle. The parameters should be close in value. Refer to DTC P0106 .

Did you complete the action?		 - Go to Step 9  Go to Hard Start 
9
  1. With a scan tool, clear the DTCs.
  2. Attempt to start the engine.
Does the engine start and continue to operate?		 - Go to Step 10  Go to Step 2 
10
  1. Idle the engine.
  2. Allow the engine to reach operating temperature.
  3. Observe the DTC information with a scan tool.
Are any DTCs displayed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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