nissan 200sx loses power when hot
 

Hi , first posting on here so be gentle!
I have a 1992 200sx auto that has developed a problem. runs ok when cold but when it reaches temperature it loses all power making it go at only about 10mph and eventually stopping altogether. Plugs appear to be saying its running too rich so it could be "choking " itself to death. I have done some fault finding and have discovered a faulty coil on cylinder 2 which I am about to replace. It couldn't just be this could it?