Hi, when I press on my brake pedal, I hear a hissing noise, like air escaping, then the pedal is really hard to press. If I keep pressing for a few seconds, it goes down a little and the car stops. But something is not right. I have not seemed to lose any fluid. Does anyone have an idea? I was thinking either a brake power booster, or a vacuum leak. Any thoughs? Does anyone know how to check the vacuum pressure? Thanks

hey.. i need some help.... - Recently my car started pumping out a lot of smoke. - I also failed emissions testing for extremely high NOx and high CO and HC readings. - I can't tell if it is blue or white smoke coming out of the exhaust. It doesnt look like there is any oil in my coolant, so i dont think it is the head gasket. - There is also water dripping from the edge of my muffler and out the end of my tailpipe. [B]Does anyone know what could cause high emissions and a lot of smoke from the exhaust?[/B] I know it might be the piston rings, but could there be something else? Thanks! Chris