Vibrations and clunking noise are both signs of bad motor mounts. If the clunking is getting worse than mounts should be changed to avoid any serious damaged to major engine components.
yes
Ignition switch
a weak battery will not cause an engine vibration.
Check the 1989 Honda Accords timing. If the engine has jumped time then the engine will buck and sputter.
No, the only issue probably is feeling more vibration from the engine inside the car.
There are numerous vacuum hoses at various locations on the engine and under the dash.
The 2012 Honda Accord has an inline 4 engine.
The 2004 Honda Accord has an inline 4 engine.
The 2007 Honda Accord has an inline 4 engine.
The 2003 Honda Accord has an inline 4 engine.
The 2005 Honda Accord has an inline 4 engine.
The 2006 Honda Accord has an inline 4 engine.