Engine Idle Vibration; Engine Stalls, Idles Low or Rough

Engine idle vibration; engine stalls, idles low or rough

Diagnostic Procedure:

1. Worn engine or transmission mounts

2. Low ATF level

3. Engine output low

4. Torque converter clutch piston defective

5. Shift solenoid valve D defective

6. A/T clutch pressure control solenoid valve C defective

7. Lock-up control valve defective

8. Lock-up timing valve defective

Also check for:

- Check engine and transmission mounts.
- Check the ATF level, and check the ATF cooler line for leaks and loose connections. If necessary, clean the ATF cooler lines.
- Check the stall speed. A/T Stall Speed Test
- Check the engine control system.
- Check the line pressure. A/T Pressure Test
- Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Inspect the shift solenoid valve D function with the HDS. A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- Inspect the A/T clutch pressure control solenoid valve C with the HDS. A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- Check for a seized shift solenoid valve, and inspect the O-rings.
- Replace the torque converter.
- Check the lock-up shift valve and the lock-up timing valve in the main valve body for free movement, and check the valve springs for wear and damage.
- Check the lock-up control valve in the regulator valve body for free movement, and check the valve spring for wear and damage.