I have noticed periodic engine shake/vibration with my 2001 Odyssey (143k) and I would like to ask for a help. I can only feel the vibration when gear is set at neutral or park position after engine is warmed up. I don't feel at start up. Don't feel if gear is engaged in D or R. I am the original owner and didn't notice this issue until recently.
When it happens, engine shakes at every 1 second. I can see engine vibrate under the hood. I don't see RPM surging. I told it to my dealer and they also felt the vibration. But they said computer controls engine and they can't even adjust idle speed.
Because of prior severe vibration problem (which was fixed with rear motor mount replacement), I developed a habit to put parking brake and then shift to neutral whenever I stop at signal. Like I mentioned, I could keep gear at D position and keep my foot on brake pedal. But my feet started bothering recently, so I want to keep the foot off brake pedal during stop.
Here is a list of problem/maintenance record that may or may not link to the issue.
105k Replaced front & side motor mount, timing belt & water pump
125k Replaced transmission
136k Fixed misfire by replacing #4 ignition coil (I had to drive ~3 miles with 5 cylinders...)
141k Replaced rear motor mount. This fixed severe vibration problem.
143k Replaced front & rear struts/shocks
2 transmission mounts were not replaced yet. According to dealer, those mounts are tougher than other 3 motor mounts and don't think as the cause of the problem.
I wonder if anyone has suggestion...