OOPS!!
Brakes
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Junior User
Joined: Mar 2003
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Brakes
I just replaced the front calipers, master cylinder and bled the entire brake system on my '93 F250 4x4: The pedal is not and firm when the engine is not running, but when running will slowly go to the floor with firm pressure . What gives, this all started when I had the calipers replaced two weeks ago, so I installed a new master cylinder and no change occurred. I'm puzzled!
New User
Joined: Oct 2003
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Mine has done that since day one.
I am assuming it has something to do with the power assist (if that's what it's called), which does not work without the engine running.
Same conditions on other vehicles, so I assume it is normal.
Mike
I am assuming it has something to do with the power assist (if that's what it's called), which does not work without the engine running.
Same conditions on other vehicles, so I assume it is normal.
Mike
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Junior User
Joined: Mar 2003
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Hmm. I didn't notice it before this, but from what do know it isn't it isn't normal. No other Ford truck in our fleet is doing this, so I've checked vaccum and bled the entire system. It's still present in this one truck.
Post Fiend
Joined: Jun 2002
Posts: 13,873
Likes: 3
From: Atlanta GA
First thing is to make sure rear drums are properly adjusted whenever you have a weak brake in a Ford. Then, you said you bleed the whole system.
Did you bleed the rear ABS valve?
Did you bench bleed the mstr cyl?
Did you bleed the rear ABS valve?
Did you bench bleed the mstr cyl?
Senior User
Joined: Aug 2003
Posts: 207
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From: Chicagoland
Hey, I have a quick question about brakes. I just replaced the stock front rotors on my car with EBC slotted and dimpled rotors. I replaced the pads at the same time, per instruction manual. now the rotors make a ticking sound as I'm driving down the road. It sounds like a secada bug ( I have no idea how to spell it). the brake pedal feels fine, no softness, no fade. Any ideas?
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Posting Guru
Joined: Dec 2002
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From: peoria, az
silvapain.... I think you have a rock in your tire or wheel.
walnut.... Did you replace the copper washers when you did the calipers?
walnut.... Did you replace the copper washers when you did the calipers?
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Mountain Pass
Joined: Dec 2001
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From: Kernersville, NC
I just found tonight that after bleeding the right rear brake for the THIRD time that apparently it has a nasty habit of holding onto some air. I must have bled a quart through that one line alone. Truck would hardly stop, pedal to the floor and after I bled that it locks up the rear wheels halfway through the pedal travel (well, ABS kicks in).
It would be rare that the MC would fail just after replacing the calipers, so I'd look closely at the parts of the system you worked on first, namely the calipers and bleeding. First of all, check closely for leaks. If the pedal won't hold then there is either an external leak or the new MC is bypassing. I just put my old one back on to find it was in fact fine after thinking it was the cuplrit of a soft pedal.
Bryan
It would be rare that the MC would fail just after replacing the calipers, so I'd look closely at the parts of the system you worked on first, namely the calipers and bleeding. First of all, check closely for leaks. If the pedal won't hold then there is either an external leak or the new MC is bypassing. I just put my old one back on to find it was in fact fine after thinking it was the cuplrit of a soft pedal.
Bryan
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