You could have leak/ If the smoke out of the exhaust is oil smelling and black it is an internal oil. If it is white and has a sweet smell it is more than likely anti-freeze.
So, there is another seal that can leak into the cylinders and that is the valve seal. Either way it explains the symptoms and the misfire.
Pull a plug and see if it is black and sooty. A good running cylinder will have a tan-brown color.
Monday, August 29th, 2011 AT 10:29 PM