Well it is hard to say what will acually work. However with air coming out the exhaust I would have to assume that either that exhaust valve was open or burned or cracked most common. It could be that there is carbon build up but that would mean that the car is drove only short distances and never really warmed up. I drive my car only a mile or so to work so once a week I get it out on the highway and get it up to highway speed and well warmed up. The only thing that I could recomend to help that you could put straight into the cylinder is seafoam. As far as what I would put in the gas tank and oil would be Z-Max. Let me know what happens.
Tuesday, May 12th, 2009 AT 9:49 AM