Pontiac Repair: wierd smell, pontiac sunfire gt, chevron techron

Question
hey, ive got a 2000 pontiac sunfire GT with a 2.4L twim cam, everytime i start the car i get a strong order out of the tail pipes and sometimes smoke, it looks like black smoke, ive change the plugs, air filter and fuel filter. if u have any idea what it could be could u let me know

thanks chris  

Answer
Hi chris:

well it can be a few things. if it's black smoke it's a over fueling issue like injectors that are leaking into the engine when the car is off. That would be my first guess. try a GOOD injector cleaner called Chevron techron and see if that help out. If it's a white smoke and it has a sweet smell it's a coolnat leak into the engine most likley caused by a leaking head gasket. hope that helps you out :)