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Help with brakes
Posted 11 March 2004 - 10:37 AM
Here is the deal. The car stops, but I can, with not much force, push the peddle down to the floor. Even when i pump the peddle I can still push it all the way down. The amount of force is just with the toes of my foot.
I am now pointing my finger at the power assist diaphram.
Anyone else run across this problem?
Posted 11 March 2004 - 12:28 PM
Question: How much pressure are you getting when you are bleeding the brakes? Does it go all the way to the floor then too?
My guess is the master cylinder. (yes, I know you said it is new!!) Without any fluid leaks in the system, you have to consider the pressure getting to the calipers, and that would be the MC.
good luck, John
Posted 11 March 2004 - 12:33 PM
passenger rear, driver rear, passenger front, driver front.
typically you always want to start with the one farthest away and work closer. if not gravity bleed. if that doesnt work, there is an open in the system.
Posted 11 March 2004 - 01:29 PM
Yes, the thought of the new MC being bad is in my mind also. I have had bad MCs that leaked back on my Ford. Nothing like this. Usually I can pump the pedal hold it and feel it go down. This one you can pump it and just push it right down without much effort at all. It was the same way with the old MC.
To give you and idea of the amount of pressure it takes to push the pedal down. It takes the same amount of force as when I bleed them. It is like there is a bleeder open.
When I bleed the brakes the pedal does go all the way to the floor. There is pressure.
The only different method I have not tried when bleeding is to turn the car upside down.
Yes, I also bench bleed the MC.
Thanks for the repies
Posted 11 March 2004 - 01:34 PM
Posted 11 March 2004 - 01:36 PM
If it drops, you have a leak. By this time, it will be obvious, like a big puddle on the floor. Rusted out brake line, or bad hose? Have you checked those yet?
If it doesn't have a leak, then it might be a really poorly rebuilt MC, like they forgot the seals!
However,you said it did this before the new MC, so I think a leaky line is more likely.
Posted 11 March 2004 - 01:40 PM
Nice thought on the rubber hoses. I will check that next.
Posted 11 March 2004 - 08:22 PM
Hope that helps.
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