Engine Cranks But Does Not Run. Chevrolet Corvette 2003

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 Corvette 🢒 Engine 🢒 Engine Controls - 5.7L 🢒 Engine Cranks But Does Not Run

Description

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:

•	The battery is completely charged. Refer to Battery Inspection/Test in Engine Electrical.

•	The engine cranking speed is acceptable. Refer to Engine Cranks Slowly in Engine Electrical.

•	There is adequate fuel in the fuel tank.

Step

Action

Values

Yes

Schematic Reference: Engine Controls Schematics

Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Diagnostic System Check - Engine Controls

Turn ON the ignition, with the engine OFF.
Observe the DTC information with a scan tool.

Does the scan tool display DTC P0230, DTC P0335, DTC P0336, DTC P0601, DTC P0602, DTC P0604, DTC P0606, DTC DTC P1626, DTC 1631, or DTC 1683?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 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

Turn ON the ignition, with the engine OFF.
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

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

Turn OFF the ignition.
Disconnect a spark plug wire.
Install J 26792 Spark Tester.
Attempt to start the engine.

Does the spark tester spark?

Go to Step 7

Go to Electronic Ignition (EI) System Diagnosis

Turn OFF the ignition.
Install a fuel pressure gauge. Refer to Fuel Pressure Gage Installation and Removal .

Important: You may need to command the fuel pump ON a few times in order to obtain the highest possible fuel pressure.

Turn ON the ignition, with the engine OFF.
Command the fuel pump ON with a scan tool.
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

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.

•	The engine coolant temperature (ECT) sensor is NOT close to the actual engine temperature. Refer to DTC P0125 .

•	Compare the MAP parameter to another vehicle. The parameters should be close in value. Refer to DTC P0103 .

Did you complete the action?

Go to Step 9

Go to Hard Start

With a scan tool, clear the DTCs.
Attempt to start the engine.

Does the engine start and continue to operate?

Go to Step 10

Go to Step 2

Idle the engine.
Allow the engine to reach operating temperature.
With a scan tool, observe the DTC information.

Are any DTCs displayed?

Go to Diagnostic Trouble Code (DTC) List

System OK