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Brake pedal goes floor hydroboost replaced and want return

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SOURCE: truck wont stop,brake pedal goes to floor,

check brake hydraulic system, brake fluid OK? master cylinder? brake fluid leak?

Posted on Sep 14, 2011


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I have a 99 chevy one ton....just replaced the hydroboost and now the brakes get sucked to the floor...ive checked for kinks in lines or blockage still no do I fix ths

You may have a internal leak in the master cylinder remove it from the hydro booster and check to see if there is any fluid coming out the back if not the inner seals are bypassing that's why you got no pressure.

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Truck wont stop,brake pedal goes to floor, hydroboost, steering pump, replaced

This sounds like a bad master cylinder, are you getting a brake light?

Sep 14, 2011 | 2004 GMC Sierra

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Brakes go to the floor to stop....already replaced master cylinder and dont know symptoms of a bad hydrobooster.....i also already bleed mc and all brakes

when you replaced the master cylinder , did you bench bleed it , in order to get all of the air out it, before installing it, and afterwards, it is recommendable to bleed all 4 wheels to get the air out also. "also some of the times , when a brake booster goe's bad the brake pedal can also become spongy.

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I was told my 1990 Buick LeSabre has an electric hydroboost brake system and the hydroboost unit needs replacement. Does anyone know anything about this system and where I can get this part?

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Brake pedal goes to the floor

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2001 RAM 2500 Brake Pedal Goes to Floor

Excessive runout or wobble in a disc (Rotor) can increase pedal travel due to piston knockback and increase piston seal wear due to necessity of caliper to follow disc wobble. Thickness variation in a disc can also result in pedal pulsation, chatter and surge due to variation in brake output when disc section is uneven. Dishing or distortion can be caused by extreme heat and abuse of the brakes. Hope this helps, Good luck.

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I have a 2001 Dodge Ram 2500 5.9 Cummins Diesel No Brake Pedal

I worked on a Dodge car one time and I had a problem with the brakes almost similiar to yours.It turns out a cheap pair of brake pads can mess up your system. I would suggest Bendix pads I also noticed you didn't mention the rear shoes. Any way use better pads it might help.

Apr 06, 2010 | 2001 Dodge Grand Caravan

1 Answer


If the pedal goes to the floor you may still have air in the system.I assume that the pedal was ok before you started and that you may have opened one or more of the bleed screws.
Check the fluid level at the master cylinder.It need to be at the proper level.
You will need to be positive that no air is in the system.If you are not familiar with brake bleeding do not attempt as you may cause more problems.
The use of a clear plastic hose that fits snugly over the bleed screws at the calipers and is immersed into a clear container may be helpfull to see if any air bubbles are present in the fluid.
A bleed kit may be obtained from an automotive supply store.

Nov 01, 2009 | 2001 Volvo S60

2 Answers

97 ford e350 brake pedal goes to the floor...

are your rear drums set up? why did you bleed the brakes. when only when you installed new pads?

Sep 11, 2008 | 2002 Ford E350

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