Checks
| Action
|
Definition: The engine
delivers less than the 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. Make sure that the vehicle
has an actual problem. |
| • | Check for dirt, or for air ducts being plugged. Clean and replace
if necessary. |
| • | Inspect the transmission shift pattern and the down shift operation. |
| • | Check the fuel quality. Refer to Fuel Quality Diagnosis
. |
| • | Check the engine oil level and quality. |
|
Fuel System Checks
|
| • | Check the fuel supply to the injection pump and the fuel return
from the injection pump. Refer to Fuel Supply System Check
. |
| • | Check the fuel pump operation. Refer to Fuel Supply System Check
. |
| • | Check for malfunctioning fuel injection nozzles. Refer to Injection Nozzle(s) Diagnosis
. |
|
Exhaust System Checks
|
| • | Check the exhaust system for a possible restriction. Refer to
Restricted Exhaust
in Engine Exhaust. |
| • | Inspect the exhaust system for damaged or collapsed pipes. |
|
Air Intake System Checks
|
| • | Check for an air leakage or a restriction in the air inlet ducts
or the intake manifold. |
| • | Check for a worn or a damaged turbo charger turbine wheel, shaft
or compressor wheel. |
|
Engine Mechanical Check
| Check the engine for the following:
| • | Improper or worn camshaft |
|
Additional Checks
|
| • | Check the control module grounds for being clean, tight, and in
their proper location. Refer to Engine Controls Components
. |
| • | Check the torque Converter Clutch (TCC) operation. |
| • | Check the generator output voltage. Repair if less than 9 or more
than 16 volts. |
|
