GM Service Manual Online
For 1990-2009 cars only

Checks

Action

DEFINITION: The engine cranks OK, but does not start for a long time. The engine does eventually run, or may start but immediately dies.

Preliminary Checks

    • Refer to Symptoms - Engine Controls .
    • Make sure that the driver is using the correct starting procedure.

Sensor Checks

Check the engine coolant temperature (ECT) sensor. Use the scan tool in order to compare the engine coolant temperature with the ambient air temperature on a cold engine. If the coolant temperature reading is more than 5° more or less than the ambient air temperature on a cold engine, check for a high resistance in the coolant sensor circuit or the sensor itself.

Fuel System Checks

    • Check the supply to the injection pump. Refer to Fuel System Diagnosis .
    • Check for air in the fuel system. Refer to Fuel System Diagnosis .
    • Check the fuel return from the injection pump. Refer to Fuel System Diagnosis .
    • Check the engine shut-off solenoid operation. Refer to DTC P0215 .
    • Check the fuel injection nozzles. Refer to Fuel Injection Nozzle Diagnosis .
    • Check the fuel tank cap vent.
    • Check for an internal injection pump problem. Refer to Fuel System Diagnosis .

Electrical System Checks

    • Check the glow plug operation. Refer to Glow Plug System Diagnosis .
    • Check for a slow cranking speed.

Air Intake System Checks

    • Check the air cleaner and the air intake ducts for a restriction.
    • Check for a restriction in the turbo charger inlet duct.
    • Check for a restriction in the intake manifold.

Exhaust System Check

Check the exhaust system for a possible restriction. Refer to Restricted Exhaust in Engine Exhaust.

Engine Mechanical Checks

Check the engine for the following conditions:

    • Improper valve timing
    • Low compression
    • Bent pushrods
    • Worn rocker arms
    • Broken or weak valve springs
    • Worn camshaft lobes

Additional Checks

    • Check for a no crank signal. Refer to DTC P0335 .
    • Check the Service Bulletins for control module software updates.