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
|
| • | Refer to Important 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 filter, contaminated fuel, or improper
fuel pressure. Refer to Fuel System Pressure Test
. |
| • | Perform the fuel injector balance test. Refer to Fuel Injector Balance Test
. |
|
Ignition
System Checks
|
| • | Check for the proper ignition output voltage with the spark tester J 26792
or the equivalent. |
| • | Check the Knock Sensor (KS) system. Refer to Knock Sensor (KS) System Diagnosis (Overview)
. |
|
Exhaust
System Checks
|
| • | Check the exhaust system for a possible restriction. Refer to
Engine Exhaust. |
| • | 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 grounds for being clean, tight, and in
their proper location. |
| • | Check the EGR Valve for being open or partially open all the time.
Refer to EGR System Diagnosis (Overview)
. |
| • | Check the Torque Converter Clutch (TCC) operation. Refer to the
Automatic Transmission. |
| • | Check the A/C operation. Refer to A/C Compressor Clutch Control Diagnosis
. |
| • | Check the generator output voltage. |
|
Engine Mechanical
Check
| Check the engine
for the proper operation of the following items:
| • | Improper or worn camshaft. |
|
