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
|
| • | Make sure 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° greater 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 Supply System Check
. |
| • | Check for air in the fuel system. Refer to Fuel Supply System Check
. |
| • | Check the fuel return from the injection pump. Refer to Fuel Return System Diagnosis
. |
| • | Check the engine shut-off solenoid operation. |
| • | Check the fuel injection nozzles. Refer to Injection Nozzle(s) Diagnosis
. |
| • | Check the fuel tank cap vent. |
| • | Check for an internal injection pump problem. Refer to Fuel Supply System Check
. |
|
Electrical System Checks
|
| • | Check the glow plug operation. Refer to Glow Plug System Check
. |
| • | 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:
| • | Broken or weak valve springs |
|
Additional Checks
|
| • | Check for a no crank signal. |
| • | Check the Service Bulletins for control module software updates. |
|
