BotieRacing954

need some help. I just got a 88 rx7 SE all stock .Well this is the problum it starts up fine. But once it starts it sounds like its runing on one rotor but its runing super ruff and it smokes a little .But once you drive it for like 15 min it clears right up and runs great. I need some advice what do you guys think? And I know I need a Rebuild It has 215,000 miles lol. on it but dont have the money to do all that right now .Just trying to fix it so I can drive it for a Little while longer so I can get some money up. thanks for the help everyone I need it... Tony