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BRAKE PEDAL FADE UNTIL PUMPED ONCE - 2002 Toyota Sienna

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I have a 1991 Mazda Navajo and put a new master cylinder on it and now I have brake pedal fade .


bleed the whole system back to front..still fade you are getting air somewhere... may have to bleed the master out of the car then put back

Dec 14, 2014 | 1991 Mazda Navajo

1 Answer

So I just changed the clutch master cylinder and the braided brake line in my 2000 camaro ss and am trying to bleed the system. The routine I'm using is typical. Pump the pedal 30 times keep it depres


you have someone helping you right? cuz you cant do it yourself, and the brakes need to be pumped only enough to get a solid midway stop of pedal travel, and with the brake still depressed by your assistant, you open the bleeder a bit until the pedal goes to the floor, you tighten bleeder, they then release brake pedal and pump it up again, rinse, repeat, until there is no spongy feel in brake pedal

Mar 21, 2013 | Cars & Trucks

1 Answer

Brake pedal soft when truck is running, gets hard like standard brakes when pedal is pumped


Sounds like your brake system has air in the lines. You will need to bleed your brakes starting with the longest line from your master cylinder. be sure your master cylinder is full and open the bleeder valve on the furthest line and have someone slowly push on the brake pedal till it is to the floor then close the bleeder and have the pedal returned to the rest position. Continue until no air comes from the bleeder. Move on to the next longest line and repeat until all lines are clear of air. Be sure to not run master cylinder low of fluid or you will have to start over. Let me know if this helps. Thanks.

Feb 06, 2011 | Ford F-250 Cars & Trucks

1 Answer

Brake pedal fades after starting vehicle,replaced master cylinder,bled brakes


mcdevito75 here, you:ll have to be alittle more secific with your problem, does the pedal fade at a red light?? The power brake assist will cause the pedal to fade just a shade, if your drums / Rotors were cut to often or cut too much the pedal will fade, also make sure you have brake linning

Jun 17, 2010 | 1995 Nissan Pickup

2 Answers

Brake pedal became soft I could pump once and it would hold the next day pumping didn't work so well I'm reasonably sure it's a master cylinder just want to be sure there isn't something else that would...


Your thinking is correct, replace and be sure to bench bleed it first before hooking it up to the brake lines, then bleed out connections, etc. as neccessary. Hope this helps, let me know

Dec 14, 2009 | 1989 Nissan Maxima

1 Answer

How to bleed brakes on a gand pree?


You will need two people, one to pump the pedal and one to open bleeders at the wheels. Start at the right rear wheel open bleeder and have someone press the brake pedal down and hold it (do not release pedal until bleeder is closed), close the bleeder and repeat until no air is coming out. Proceed to right rear wheel repeat above prceedure, proceed to right front wheel repeat above, go to left front wheel repeat above, and then check pedal for proper feel if it is a solid pedal with no fade then you have finished. If you have a low pedal or fade then bleed master cylinder. You can bleed master by breaking loose the rear line (do not loosen line all the way) just enough that fluid comes out when pedal is pressed and held. Have some press the pedal while line is loose and hold it, tighten line and repeat until no air comes out, repeat same proceedure with the front line. If you still have a low pedal or fade then you may have a leak somewhere or a faulty master cylinder.

Nov 24, 2009 | 2000 Pontiac Grand Prix

1 Answer

Low brake pressure


If you are positive everything is bled out perfectly, it's possible that there is too much runout in the wheel bearings in front and they are pushing the pads back too far.

Does it feel solid after they are pumped up once? Another possibility is that the adjusters are not coming up in the rear brakes, and the springs are pulling the cylinders back too far.

May 19, 2009 | 1996 Chevrolet K1500

1 Answer

Brake Problems


the only thing left unless you have a leak is the proportioning valve A soft pedal can also be caused by badly adjusted rear brakes but you shouldn't experience a pedal fade right to the floor with bad adjustment.

May 15, 2009 | 1995 Chevrolet C1500

1 Answer

Brake problems


still got air bleed more

Nov 02, 2008 | 1993 Buick LeSabre

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