Engine Mount Control System Troubleshooting
  1. Disconnect the upper vacuum hose (A) from the engine mount control solenoid valve (B), and connect a vacuum pump/gauge to the hose. Apply about 20 in.Hg of vacuum, and wait 20 seconds.
Does the engine mount hold vacuum?
YES -
Go to Step 17 .
NO -
Either the vacuum hose or the engine mount has a vacuum leak. Repair as needed.■
  1. Release the vacuum, then apply vacuum again.
Is there a noticeable change in idle smoothness with and without vacuum applied?
YES -
Go to Step 18 .
NO -
Replace the front engine mount.■