Checks
| Action
|
DEFINITION: The engine delivers less than expected power. There is little or
no increase in speed when partially applying the accelerator pedal.
|
Preliminary Checks
|
| • | Compare the vehicle with a similar unit. Ensure the vehicle has an actual
problem. |
| • | Remove the air filter and check for dirt, or for air ducts being plugged
or restricted. Replace as necessary. |
| • | Inspect for a proper transmission shift pattern and down shift operation. |
| • | Inspect the engine oil level and quality. |
|
Fuel System Checks
|
| • | Check the fuel pressure to the fuel injection pump. The fuel pressure
should stay above 10 PSI through all engine speeds and loads. If the pressure
drops, a restriction exists in the fuel supply lines between the pump and the fuel
tank. |
| • | Inspect the fuel injection pump operation. |
| • | Inspect for restricted or plugged fuel injectors. |
|
Exhaust System Checks
|
| • | Inspect the exhaust system for a possible restriction. Refer to
Restricted Exhaust
in Engine Exhaust. |
| • | Inspect the exhaust system for leaks. |
|
Air Intake System Checks
|
| • | Inspect for an air leak or restriction in the air inlet ducts or the
intake manifold. Refer to
DTC P0234
. |
| • | Inspect for an air leak or restriction in the charged air cooler. |
| • | Inspect for a worn or damaged turbo charger turbine wheel, shaft or compressor
wheel. |
|
Engine Mechanical Check
| Inspect the engine for the following conditions:
| • | Improper or worn camshaft |
|
Additional Checks
|
| • | Inspect the control module grounds for being clean, tight, and in their
proper location. |
| • | Inspect the torque converter clutch (TCC) operation. |
| • | Inspect the generator output voltage. Repair if less than 9 volts or
more than 16 volts. |
|
