Plugs are due at 60k. Could be the wires as mentioned by another poster,
or a host of other reasons. Due to your description (running
heavy/rough), about the only thing I'm certain of is that there's been
some change in how your engine runs-- I have little idea what that may be.
Also, if you need to ask how to change the spark plugs in this engine, I
must question whether you should be doing this job without someone with
experience present guiding you. My suspicion is that you've done very
little auto repair, and in that case, it's good to have some sort of
mentor to get you started. Stripping the threads in your engine is
neither an easy nor inexpensive problem to repair.
That said, you can access the plugs through four holes in the top of the
valve cover. They unscrew from the cylinder head.
Message posted using http://www.talkaboutautos.com/group/alt.autos.hyundai /
More information at http://www.talkaboutautos.com/faq.html