Hi HondaGirl,
The marks on the timing belt tends to wear off over period of time and the normal way of checking if it requires replacement is to visually inspect the belt condition. If it looks shiny, cracked and old, time for replacement.
The pulley timing marks tends to get dirty so a toothbrush with some soapy water would be able to get them clean and easy to see.
Not going over 40 should not be anything to do with the timing belt unless it has skipped a tooth.
I would suggest checking the spark plugs and wires, fuel filter.
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Thursday, November 13th, 2008 AT 12:06 PM