Well I have a question for the brake guys here, the other day I was normally driving along, I come up to a stop and all of a sudden no brake pedal! It goes completely to the floor, and does "try" to stop but takes awhile. when the vehicle is off it wont pump right, It feels like it is full of air. I have checked and found no leaks anywhere, my brake res is still full of fluid but no pedal? Any help would be greatly appreciated.

thanks,
Jon

 

Try bleeding the brakes, if that doesn't help might be the master cylinder is bad

 

That sounds EXACTLY like what happened to me last night. Slamed on the brakes, loud popping noise, and loss of pressure in the brake pedal with lack of stopping power. If I find my resolution before you I will be sure to post it for you.

 

^ please do, I did hear a loud pop when my brakes went aswell.

 

It happened that same thing to me 3 months ago. It was the vaccum booster. A way to confirm it, is that if you step on the gas pedal from idle, the engine might stall.

 

not the vacum booster, mine has been replaced and my vehicle doesn't try or act like it wants to stall.

 

I found my leak, but don't have the time to fix it today.

There are 5 brake lines on my truck near the master cylinder. 2 run into the Power Brake Booster? and use some sort of flexible hose on them. One of those hoses broke. I suggest you watch the hoses around your master cylinder, and with a buddy have him step on the brake and look for leaks.