Question about 1998 Ford Ranger SuperCab

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98 Dodge Ram 1500 brakes go completely to the floor.

Ok my husband spent 10 hours working on his truck today and is very frustrated. His truck was parked for about 4 months, before that it was fine, he started it up one day and he had no brakes at all. His brakes went out and him and a friend identified it was the proportional valve after going through everything and trying to trouble shoot it, so we got a new one and he installed it. Before installing the new proportional valve It was not sending any brake fluid to the back but it was going to the front. He then bled the brakes, over and over and over after the new installation.... He bled everything, all valves and they still go to the floor. He is bleeding them in the sequence he is supposed to, the master cylinder is functioning properly. When he gravity feeds the back ones only a little fluid comes out, there are no leaks in any of the lines either. Somehow he can't get the air out of these lines and he swears this is what it has to be. What else can he do? the only work he had done to it recently was installed a new power steering line that had a bad leak, that is when everything started happening and he has had a vacuum leak for a while...can either of those things have anything to do with this? I know that sounds stupid but we are trying to hit all aspects of this. Thanks for any help you can give to us.

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  • Kevin Noel May 24, 2009

    Sorry I posted this under the wrong make, I reposted in the correct area but there is no place to delete this posting, sorry.

  • gerry bissi May 11, 2010

    I would recommend having it pressure bled. Sometimes raising the front of the truck when you bleed the fronts. Then raise the rear when you beed the rears.



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It could very well be air bound, those lines to the rear brakes are the longest in the truck. Especially if he's getting a little fluid out by gravity bleeding it. My advise is to get a vacuum bleeder kit. I got mine from an auto parts store, it honestly cost me 25 dollars, and it's a gift from God! Instead of trying to push the fluid, your sucking it out from the wheel. Works beautifully, especially if your truck has anti lock brakes.

Posted on May 24, 2009


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SOURCE: brakes wont come up

sounds like a bad diaphragm in your brake booster. listen for air while running at booster , disconnect vacuum hose depress pedal if it is good there should be a big difference in pedal

Posted on Apr 13, 2009

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SOURCE: 98 Dodge Ram 1500 brakes go completely to the floor.

Hello, and this can be several things. First off you need to check your hydro-boost. To do this pump the brakes while the engine is off until the brakes become hard the start the engine. If the pedal sinks and then comes back up your hydro-boost is working. If they sink and do not "kick back" a little bit you may have a problem in your power steering. Did you bleed the power steering system whin you installed the new power steering line. To bleed your power steering jack up the front of your vehicle and put it on jack stands and always remember proper jackstand placement and jack procedures and wear eye protection while under a vehicle. Once the vehicle is jacked up, raise the wheels off the ground top off fluid then:

Turn the wheels lock to lock 10 times with engine off
Lower car, top off fluid
Start car and trun the wheels lock to lock 10 times
Top off fluid
Any air left in there should bleed out in 6-12 miles of driving

Now before you go this far make sure all your power steering hoses and clamps are not leaking and tight.

If your proportioning valve has been replaced there is a safety valve inside that shuts off fluid to your back brakes if they are not working. This valve can be reset by removing a plastic cover on the front of it and reseting the valve or you can step on the brakes real hard and a audible pop should be heard and this is the valve resetting. You should also check how your disc brakes are adjusted in the back because the wheel cylinders can bring in air through them. The master cylinder also is a device that needs to be bled. Axle bearings hold the wheel to the axle and leak fluid around the inside of the wheel causing an air leak as well. I would go over your intire brake system and chase and follow all brake lines, calipers, and brake components to see if any ae leaking. If all else fails get a repair manual for your vehicle and use the troubleshooting guide in it. If you have any other questions just ask me and I hope this solves your problem for you!

Posted on May 24, 2009

  • 1985 Answers

SOURCE: 1997 GMC Sierra 5.7 changed master cylinder

check under your master cylinder,is there another clyinder below with one line in and one line out,if you do I found this is for the Abs to the rear,I had to replace this it was full of air,and did exactly what yours is now

Posted on Dec 09, 2009

  • 15 Answers

SOURCE: how do u bleed brakes on 1995 mercury sable?cannot

lots of the new cars needs pressure to be bled and also a computer to go in to brakes to open up the valves please contact you dealer

Posted on Oct 03, 2010

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