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Re: brake hang up
This is due to them sticking on the pins of the caliper. this is a frequent problem with an eassy fix. first thing is jack up the vehicle and place jack stand under the engine carriage where it bolts to the uni-body(never work on a suspended vehicle without jack stands). remove the wheel and set aside. then the are (2) bolts that hold the caliper to the support bracket these will be 14 or 15mm heads they will also have rubber grommets on both sides of the caliper.(do not remove the caliper from the rotor)remove the bolts and clean them thoroughly then use antiseize lubricant on the on the sleeve inserts and replacethem in the caliper use anti seize on the bolts but noton the threads retighten the bolts replace the tire and remove the jackstand lower the vehicle. this will do the trick... please rate thanks
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perportioning valve under the master cylinder may be stuck it is usually directly under the master cylinder(follow the lines down to it) this sends more fluid to the front than the back and will stick.if bad.. replace it..good luck..
the way the car brakes are on todays cars are. the front brakes a supposed to grab a second before back brakes. so I would look to see if fluid is ok! and check out the front brakes, you could have a sticking caliper, thats stuck in and not applying the front brakes properly. have a good day !! also when you check the brakes make sure the caliper slide pins are ok. if not the caliper will hang up. if they are sticking replace caliper pins and grease them up good so caliper slides on them. my 2000 malibu had a similar problem and I found that the pins on caliper were bad, replaced them and all is fine.
Check for a Front caliper locking and not releasing or for poor vacuum on the master cylinder. This could also be an issue with the Brake Cylinder being low on Fluid so check your fluid level. You also need to check your rack and Pinion steering or Power steering control to make sure you don't have binding.
i suggest a bad master cylinder, but 1st answer this, when you apply brakes firmly and keep pressure on the brake pedal, does pedal go down while you're holding pressure on the pedal? if so, the master cylinders bad. and also have you checked the vacum to the brake booster?
Start with brake in the rear that is the farthest away from the master cylinder ( if your master cylinder is on drivers side start with passenger rear,pump up brake pedal until hard have someone else open bleeder valve until air or fluid squirts out,while holding brake pressure even if goes to the floor dont release pedal until bleeder valve is tightened or you will **** air back into the line,do this several times making sure you get a full stream of brake fluid and no air,continue to other rear wheel and then proceed to front wheel furthest from master cylinderand then final wheel. if you still don't have brakes change master cylinder and bleed all brakes again.
You need to bleed the whole system. Once this is done it should work better. Make sure you are not low on brake fluid. If the front brakes are disk brakes and the rear are drum breaks, the front really does most of the stopping, the back jjust keeps the car from spinning or swaying. But the main stopping power is in the front breaks. They need to be bled correctly, make sure brake fluid is up and make sure emergency break is not engaged. The emergency break uses a lever and cable to activate the rear brakes. The emergency breaks don't run off brake fluid...
please give good ratings, they are very important...
How did you check the rear brakes not working? If the van is raised and the wheel hanging, the load sensing proprotioning valve releases the pressure on the brake line and you might not be geting lots of braking on the rear axle. Is that the case? You might need to put axle stands under the suspension arms at the back and put some load in the van and brake see if there is any difference now. Cheers.