Surges/Chuggles

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

- Refer to Important Preliminary Checks. Testing and Inspection
- 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 to make sure the reading of Vehicle Speed Sensor (VSS) matches vehicle speedometer. This excludes vehicles with electronic transmissions where some variation between VSS and the speedometer is normal. Refer to DTC P0501. P0501

FUEL SYSTEM CHECKS
Check the fuel pressure while condition exists. Refer to Fuel Systems.

ADDITIONAL CHECKS

- Check the control module grounds for being clean, tight, and in their proper locations.
- Check generator output voltage. Repair if less than 9 or more than 16 volts.
- Check vacuum lines for kinks or leaks.
- Check TCC operation.