Does this car have a timing belt instead of timing chain? Since you are slowly approaching 100,000 miles I should tell you a general rule of thumb with auto technicans is to replace the timing belt at 100,000 miles even if it still looks good because after 100,000 miles its a ticking time bomb.

And considering how more and more engines are becoming interferance engines a broken timing belt could result in serious engine damage if you continue to try and start the car. Its just alot safer to replace the belt at 100,000 miles before it breaks than risking it breaking and possibly totaling your engine out.