My Odyssey shakes when idling
I replaced the rear and front motor mounts and that helped a lot

But

When it's in gear the vehicle shakes ..sometimes exaggerated sometimes more subtle ,,,,,,,when it's in neutral there isn't much vibration

I am not sure if this is part of the problem but the idle fluctuates too
It gets very slow and then speeds up again

A Mechanic mentioned two things The throttle positioning sensor and the Map sensor

We replaced the rotor and cap and changed the fuel filter