I believe I have a bad fuel injector but not sure. I have been running motorcraft platinum plugs and have been having some problems with it wanting to crank and what not. There is a hint of gas smell coming from the oil so I called a buddy he said take the platinum plugs out and put the reg ones back in. As I was changing plugs I noticed that one of the plugs looked kinda bad and the ceramic piece was cracked and broke in half. I replaced all the plugs and it's still acting up like it was before. Could the injector be bad or is there another problem? Also I'm leaking radiator fluid somewhere and not sure. I have no sign of fluid on ground and sometimes I have white smoke coming from tail pipe. Any thought?