Engine Cranks But Does Not Run. Chevrolet S10 Pickup

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2003 🢒 S10 Pickup - 2WD 🢒 Engine 🢒 Engine Controls - 2.2L (LN2) 🢒 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 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:

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

•	The engine cranking RPM is determined to be acceptable when compared to a known good vehicle. Refer to Engine Cranks Slowly in Engine Electrical.

•	There is adequate fuel in the fuel tank.

Diagnostic Aids

Test and/or inspect for the following conditions:

•	Proper idle air control (IAC) operation--Refer to Idle Air Control (IAC) System Diagnosis .

•	Intermittent conditions--Refer to Intermittent Conditions .

Test Description

The number below refers to the step number on the diagnostic table.

While cranking the engine, the crankshaft position (CKP) sensor active counter should increment to 255, and roll over to 0.

Step

Action

Values

Yes

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 DTCs P0336, P0601, P0602, P1621, P1626, P1631, or P1632?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 3

Does the scan tool display any vehicle theft deterrent (VTD) DTCs?

Go to Diagnostic System Check - Theft Deterrent in Theft Deterrent

Go to Step 4

Attempt to start the engine.
Observe the CKP active counter while the engine is cranking with a scan tool.

Does the CKP active counter increment while cranking the engine?

Go to Step 5

Go to Electronic Ignition (EI) System Diagnosis

Command the fuel pump ON with a scan tool.

Does the fuel pump turn ON?

Go to Step 6

Go to Fuel Pump Electrical Circuit Diagnosis

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

Is spark present?

Go to Step 7

Go to Electronic Ignition (EI) System Diagnosis

Turn OFF the ignition.
Disconnect an injector connector.
Install the J 34730-405 Injector Test Lamp to the injector connector.
Attempt to start the engine.

Does the test lamp flash while the engine is cranking?

Go to Step 8

Go to Fuel Injector Circuit Diagnosis

Turn OFF the ignition.
Install the fuel pressure gage. Refer to Fuel Pressure Gage Installation and Removal .
Turn ON the ignition, with the engine OFF.
Command the fuel pump ON with a scan tool.

Is the fuel pressure within the specified range while the fuel pump is operating?

248-325 kPa

(41-47 psi)

Go to Step 9

Go to Fuel System Diagnosis

Inspect for the following conditions:

•	A collapsed air intake duct

•	Restricted air filter element--Refer to Air Cleaner Element Replacement .

•	Spark plugs that are fouled--Refer to Spark Plug Inspection . If the spark plugs are fouled, determine what caused the condition before replacing the spark plugs.

•	Restricted exhaust system--Refer to Symptoms - Engine Exhaust in Engine Exhaust.

•	The engine coolant temperature (ECT) sensor is NOT close to the actual engine temperature. Refer to DTC P0117 or to DTC P0118 .

•	Engine mechanical conditions, e.g. worn timing chain and gears, low compression, etc.--Refer to Symptoms - Engine Mechanical and Engine Compression Test in Engine Mechanical.

•	Compare the manifold absolute pressure (MAP)/ throttle position (TP) parameters to another vehicle. The parameters should be close in value. Refer to DTC P0105 .

Did you find and correct the condition?

Go to Step 10

Go to Diagnostic Aids

With a scan tool, clear any DTCs that are set.
Attempt to start the engine.

Does the engine start and continue to operate?

Go to Step 11

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