Checks
| Action
|
DEFINITION: The engine
has a power variation under a steady throttle or cruise. The vehicle feels
as if it speeds up and slows down with no change in the accelerator pedal.
|
Preliminary Checks
|
| • | Be sure the driver understands the torque converter clutch (TCC)
operation. |
| • | Be sure the driver understands the A/C compressor operation. |
| • | Use the scan tool in order to make sure the VSS reading matches
the vehicle speedometer. This excludes vehicles with electronic transmissions
where some variation between VSS and the speedometer is normal. Refer to
DTC P0501 Vehicle Speed Sensor (VSS) Performance
DTC P0501 Diagnostic Aids. |
|
Fuel System Checks
| Check the fuel pressure while the condition exists. Refer
to
Fuel Supply System Check
.
|
Additional Checks
|
| • | Check the control module grounds for being clean, tight, and in
their proper locations. |
| • | Check the generator output voltage. Repair if less than 9 or more
than 16 volts. |
| • | Check the vacuum lines for kinks or leaks. |
| • | Check the TCC operation. |
|
