My car shakes at a red light only when it's in drive.
It drives fine I just changed spark plugs it just had
an oil change. Air filter looks fine ,I've replaced
starter altinator so I'm not sure why it's shaking
if all was done well..then look for a vacuum leak next..
If was not shaking before installing plugs may want to remove plugs again and check for prong to spark plug may have gotten bent or picked up some dirt between electrode and prong. Also make sure plug wires are fully seated in to make contact with plug.
Could have a vacuum leak or you may have bad motor mounts
Chances are likely bad motor mount or mounts. If one is bad and not replaced soon it will cause other to fail shortly after.
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