04 expedition break problems
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04 expedition break problems
I just did a brake job all the way around on my wife's uncles 04 expedition and have run into a snag 
. After I did everything and test drove it down the driveway, everything seemed fine, then he got in it and said the pedal was going to the floor. I got in and confirmed this. I bled the brakes with no signs of improvement. with the truck not running there is full pedal, no signs of dropping. But as soon as you start the truck, the pedal again goes to the floor. I drove the truck down the street and it is stopping, but takes longer to do so, unless you pump the brakes a couple times, then it will throw things from the back seat at you. Someone Please HELP!!!
. After I did everything and test drove it down the driveway, everything seemed fine, then he got in it and said the pedal was going to the floor. I got in and confirmed this. I bled the brakes with no signs of improvement. with the truck not running there is full pedal, no signs of dropping. But as soon as you start the truck, the pedal again goes to the floor. I drove the truck down the street and it is stopping, but takes longer to do so, unless you pump the brakes a couple times, then it will throw things from the back seat at you. Someone Please HELP!!!
Last edited by wewsel; Nov 13, 2011 at 08:03 PM. Reason: gramatical
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Joined: Jun 2004
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From: Orlando, Fla
First, check you resevoir to be sure its full to the mark other than that you have air in the lines. Rebleed them by having a jar with some brake fluid in it (about 1/4 of the jar)....run a clear plastic line from your bleeder into the fluid one caliper at a time....pump the brakes to the floor slowly until ALL the air is out of it...this includes the plastic line itself....the line will suck up more fluid as it pumps out the air and there must be nothing but fluid in the hose before you close your bleeder. By using this process you don't have to have someone hold the pedal while you close that bleeder. Now move on to your next caliper. I would start with the fronts....since you just did the brakes, I'll assume you have new fluid in the resevoir?...so what fluid you pump into the jar can be recycled until you have completely purged the system of air.
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Bled the system many times.... no good. Still the pedal goes to the floor. I never opened the system when I did the brake job, so I don't think any air could have gotten into the lines. I have found some talk about debris getting into the abs modulator from not opening the bleeder valve while compressing the caliper pistons. Could this be the problem? If so, how much could I be looking at to replace the module? Any thoughts greatly appreciated.
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Did you install new rotors or resurface the existing ones? If not, there will be a wear-in period where the brakes will not work very well. If that turns out not to be the issue, then it sounds like the problem could be a 7-year old vehicle with an original master cylinder.
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