timing belt change on 1999 Mercury Mystique

How do u time the crankshaft timing with the camshaft timing when changing the timing belt?I think mine is off because my engine idles rough.Want to change the belt but not sure how.Thanks

Asked by for the 1999 Mercury Mystique
1 answer
This is a complex job that would be too difficult to explain online. Engine rough running is typically not caused by a defective timing belt. Do you have a check engine light? Have you pulled the diagnostic codes? Steps to try first.