Help With Passport Needed 97 bad plz help

i have a bad motor shake when idling and when accelerating can anyone give me an idea of a simililar problem and a fix

Priority one = check the motor mounts.
Priority two = check the timing [ belt may need replacing ]
Check for disconnected/broken vacuum lines [causes bad air intake problems]
Check spark plug wires for grounding [shakes from misfiring]
DO a Tune-up = change plugs, check timing

Hopefully it is some thing simple and not emissions control related