Checks
| Action
|
Definition: White, black, gray or blue smoke under load, idle or start
up hot or cold.
|
Preliminary Check
|
| • | Make sure the vehicle has an actual problem. |
|
Fuel System Checks
|
|
Sensor Check
|
| • | Check the Engine Coolant Temperature (ECT) sensor by using 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. |
|
Air Intake System Check
|
| • | Check the air cleaner and the air intake ducts for a restriction. |
| • | Check for a restriction in the intake manifold. |
|
Engine Mechanical Check
|
| • | Check for incorrect basic engine parts such as the cam, the heads,
the pistons, etc. |
| • | Check for any excessive oil entering the combustion chamber. |
|
Glow Plug
System Check
| Check glow
plug system for proper operation. Refer to Glow Plug System Check.
|
Checks
| Action
|
Definition: White, black, gray or blue smoke under load, idle or start
up hot or cold.
|
Preliminary Check
|
| • | Make sure the vehicle has an actual problem. |
|
Fuel System Checks
|
|
Sensor Check
|
| • | Check the Engine Coolant Temperature (ECT) sensor by using 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. |
|
Air Intake System Check
|
| • | Check the air cleaner and the air intake ducts for a restriction. |
| • | Check for a restriction in the intake manifold. |
|
Engine Mechanical Check
|
| • | Check for incorrect basic engine parts such as the cam, the heads,
the pistons, etc. |
| • | Check for any excessive oil entering the combustion chamber. |
|
