Engine Idle Vibration; Engine Stalls, Idles Low or Rough

Engine idle vibration; engine stalls, idles low or rough

Diagnostic Procedure:

1. Low ATF level

2. Worm engine or transmission mounts

3. Shift solenoid valve E defective

4. Drive plate defective or transmission misassembled

5. Engine output low

6. Torque converter clutch piston defective

7. ATF pump worn or binding

8. Lock-up shift valve defective

Also check for:

- Check the ATF level, and check the ATF cooler lines for leakage and loose connections. If necessary, clean the ATF cooler lines.
- Check engine and transmission mounts.
- Improper alignment of ATF pump and torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Inspect the ATF strainer for clogging with particles of steel or aluminum. If the ATF strainer is clogged, replace it, and clean the torque converter, cooler, and lines.
- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Check for a misinstalled/damaged drive plate.
- Check that the idle rpm in gear is the specified idle speed Testing and Inspection.
- Replace the torque converter.
- Check the lock-up shift valve in the regulator valve body for free movement, and check the lock-up shift valve spring for wear and damage.