is the tensioner the problem
what do I do if timing belt is off by one tooth on 1999 Acura CL
maybe it is the tensioner, unless maybe someone installed it off a tooth
Replace the belt and all timing components along with the water pump.
Take it back to the mechanic who replaced the belt, if it was just previously done. Who told you it was off one tooth? If you havent replaced the timing belt recently, you are at the mercy of the mechanic who told you it was off one tooth. Get a second oppionion from other mechanic you know is honest and reputable.
What makes you ask? How do you know it's off A tooth? 2.3--3.0?? CL right?