Just finished putting on a new timing belt, tensioner, pulley & water pump (Rockauto Gates #TCKWP295D). Its an 06 SXT with 102k on it... no mechanical issues, this was just PM. Took a little longer than some of you have stated but I've got other irons in the fire to deal with also. So, I started it up today and there was a slight tapping noise coming from the pass. side cylinder bank. After if warmed up and the idle settled a bit, the engine has a slight shake to it now also, and the throttle seems slow to respond if i just rev it some (no driving yet)... had NONE of these issues before. CEL came on after it warmed up, but I shut it of and started it again and it went away...for now. I'm thinking I may be a tooth off on the passenger side sprocket because when I put the new hardware on, it was off by about a 1/2 tooth (counter clockwise from the timing mark), but the drivers side and crank were DEAD ON their marks . My question is... I know that if I take it all apart and jump it forward, its going to be a 1/2 tooth ahead of the mark (I know because I already dealt with it when I was putting the new belt on. I figured I had a 50/50 chance of making the right guess...) So, which is better?... to be a 1/2 tooth ahead, or a 1/2 tooth behind? Will it damage anything if I were to let it run or drive it for a while? Any other opinions? Thanks for the help guys...