My mother's Santa Fe is 20,000 miles past due for a tune up. With my dad in the hospital she forgot about it and now it started running rough. A Hyundai dealership is wanting $574 for just spark plugs and wires and $891 for a total tune up. They are also saying that it needs a new timing belt which costs $659. So a full tune up plus the belt will be $1659 after tax. With all the medical bills and everything she is afraid to spend that much on it right now. I am considering paying to have it done myself but (being the cheap bastard that I am) am wondering if I could do the tune up myself. I know I can't do the timing belt myself though. Thoughts?