I know what has to be done to fix this problem, BUT I have no idea which coil it is that needs replacing. I have had conflicting input from friends and co-workers on this matter and am hoping someone knows the answer for sure. Thanks for you time and advice.

 

Well cyl. #4 is the very back cyl. on the passenger side, and coincedentally the hardest to get to. If you haven't changed the plugs recently it wouldn't hurt to put one in that cyl. Hope this helps.

 

Thanks for the advice! New plugs and it was still running rough so I put a new coil in on passenger side rear and she's chirping second gear again.