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 customer's vehicle with a similar unit. Make sure
the customer has an actual problem. |
| • | Remove the air filter and check for dirt or a restriction. |
| • | Check the transmission shift pattern and the downshift operation.
Refer to Transmission Controls section. |
|
Fuel
System Checks
|
- Check for a restricted fuel filler, contaminated fuel, or improper
fuel pressure. Refer to
Fuel System Diagnosis
.
- Perform the fuel injector balance test. Refer to
Fuel Injector Balance Test
.
|
Exhaust
System Checks
|
- Check the exhaust system for a possible restriction. Refer to
Restricted Exhaust System Check
.
- Inspect the exhaust system for damaged or collapsed pipes. Inspect
the muffler for heat distress or a possible internal failure.
|
Additional
Checks
|
- Check the Control Module ground for being clean, tight and in
their proper location.
- Check the EGR Valve for being open or partially open all the time.
Refer to
Exhaust Gas Recirculation (EGR) System Diagnosis
.
- Check the Torque Converter Clutch (TCC) operation. Refer in
Functional Test
in Automatic
Transmission.
- Check the A/C operation. Refer to
Air Conditioning (A/C) Compressor Control Circuit Diagnosis
.
- Check the generator output voltage. Refer to
Charging System Check
in Engine Electrical.
- Check the Knock Sensor (KS) system.
|
Engine
Mechanical Check
| Check the engine for the proper operation of the following items:
| • | Improper or worn camshaft. |
|
