I have a 2003 honda civic ex with about 150K on it. I recently replaced the head gasket, of course messing with the fire wall and all the hoses, brake booster/brake lines that sort of thing so maybe that is what is causing the issue. As the title says when I press on the brakes they go all the way to floor and the car slows very gradually, pressing it all the way down hardly seems to make much of an affect on the car. Not entirely sure what is causing this issue. I keep reading that it could be one of three things, the master-cylinder is broken, break-booster is bad, or there is a leak somewhere in the vacuum tubes. There is no leak on the floor of the car, area nearing the master-cylinder. When I check the brake fluid, it is not topped off. But as far as I know brake fluid doesn't just go as a result of general wear and tear, right? It goes for specific reasons such as a leak somewhere.
Also, I have not replaced the brakes ever on this car and I know the driver side is basically completely gone. However the passenger is still good. Could having the driver side rotor/pads be worn down cause this problem? What would cause the brake fluid to be missing?
And since this the right brake light has stayed on. The same one that would come on if I pulled the emergency brake. It's weird because a week ago the brakes seemed fine, not great but nothing like having to pressed the pedal all the way to the floor to get a response. It just all the sudden happened one day.
Also, don't worry I am not driving this car. It's something I am wanting to fix up, and fix right.