I have a 99 Mazda B-4000 4x4 (identical to Ford Ranger XLT).  I took it in to
the dealer for an oil change and immediately when I started the truck it was
shaking while idling.  I notified the mechanic and he came out and checked to
make sure oil was filled etc.. but all I know is that is was fine before and
now it shakes.  What could have happened?  Once I begin moving everything is
normal, but it still shakes only when I am stopped and it is idling.  It is a
manual transmission and it doesn't seem to shake from low idle speed since
when I push the gas in neutral it still shakes.  This is baffling to me, does
anyone have any ideas?
Regards,
Matt