when I press the brakes really hard I stop but can't get them to lock up. I am ok in traffic but somehow I dont think this is normal. I do get stopping power but do I have air in the lines or what the brake fluid is up to full.
this is covered a lot...try doing a search on it...usually if the car stops but the breaks dont lock up, it can be a number of things...a bad break booster will occur if you can press the pedal to the floor before it even starts to do anything..very spongy feeling...did you try unhooking the vaccum line that goes to it to see what happenes?
1. When parked and idling, if you push on the brakes the engine idle will change. I believe the idle drops. My booster seems to be bad at the moment and that's what happens.
2. When applying the brakes, the brake pedal feels very stiff and hardly moves.
3. When applying the brakes you'll probably hear a hissing sound.
4. Start the car while holding down the brake pedal. What happens? Does it feel different? If so, it may not be the brake booster.
If your booster seems to have failed check for leaking hoses and check the check valve. It's practically on the firewall where the two rubber hoses connect. At least, that's how it is on my car - a 75 280 with bad booster (and visiting relatives so I don't have the luxury of fixing it).
I had my booster die on my last thursday and it was fkin scarey. Someone in a 4x4 cut me off. I put my foot on the brake (it went to the floor) and the car didnt want to stop (slightly slowed down). Had to yank the hand brake and throw it back into 1st.