Brake Pedal Goes To Floor After New Master Cylinder

Could my master cylinder be bad? - Lee. New to me truck (daughter has been driving) recently noticed the brake pedal goes to floor under light pressure while engine is running. We'd open the bleed valve first, THEN depress the the pedal. In part one in this series, we explain how to test for a low brake pedal by blocking the brake lines. My brake pedal begins to feel more and more spongy. 7L L6 - Diesel Catalog Laramie Longhorn 6. I do get braking power, but not 100%. After completing installation of a new front pass side hard brake line, and front hoses, rear calipers and rotors, and bleeding the system 3 times with a Mity Vac, still no pressure, pedal drops to the floor. Finally, after turning a sharp corner, my brakes sunk to the floor. After installing the new set, my pedal goes nearly to the floor. Ships from. car is off jacks and drivable (but not. Feels more like a warped rotor, but you don’t feel it every time you brake. I tried pumping them before starting. I quickly put on the emergency brake, and that held fine. This included: new master cylinder(was bench bleed), new brake lines, new rubber hoses to front calipers, new calipers, new pads, and new rotors. My pedal seems pretty soft right now. Under the hood, there is no sign of the rod. I am also constantly losing brake fluid. Put in new master cylinder, no change. Pit fluid in the cylinder and have a buddy push down on the brakes untill you see where it's coming out at. 1) After changing the front break pads, the pedal began to sink to the floor. I was sure to completely bench bleed the master cylinder before installing it. After knowing how to tell if brake booster or master cylinder is bad, it is the responsibility of the driver to keep a check on the brake system of the car. After changing all this I had a very soft pedal. However the pedal goes all the way to the floor. there is an adjuster at the tip of the rod that is in the master cylinder, shaped like a bullet. after replacing it. Gone to three different mechanics. Likely, your brake master cylinder has failed and you will need a new one and fast. In a case where fluid drained back, the next time the brakes were applied, the pedal would have to be pumped up to fill the lines. Does the pedal stay firm when you continue applying pressure, or does it seem to sink slowly to the floor? If the pedal sinks, your master cylinder may be defective, and that's unsafe. This is typical of a leak in the brake lines, calipers or a master cylinder problem. My pedal seems pretty soft right now. Brake pedal still goes to the floor. Brake Pedal Fade I had something similar to this on my C220 CDI. I was also happy the brake pedal was more sensitive, not as much pressure was required to slow down. Still sounds like air in the lines?. After searching it looks lie my problem is either my master cylninder or booster is bad. For the last six months or so the brake pedal will get stuck after I press it fully; this happens about 10% of the time. Master cylinders should be bled while mounted to the brake pedal assembly. We show you how to upgrade the braking system in your C3 or C4 Chevrolet Corvette by replacing the brake master cylinder with a new unit - Vette Magazine brake light goes on. After a rear brake pipe split I replaced it which I thought would cure my no brakes problem. go back one click. A bad master cylinder does not transfer the power from the brake pedal to stop the vehicle safely. We are all very disappointed and perplexed. New to the forum and it looks like a lot of good info is spread so I am posting my recent issue. Essentially, when you check your master cylinder, you're making sure that you have enough brake fluid, which is stored in the master cylinder. BTW, the master cylinder is a redundant system. My initial reaction was it felt like a brand new set of brakes. As the car has no brakes when using the brake pedal, I wanted to fill the reservoir to get some braking action when I move the car. Bleed all four wheels again using Steps. The duel diaphram clutch is turning into a pain, and I would love for my 242 clutch to work as effortlessly as my 122 hydraulic clutch. I am running the 7/8" master cylinder and proportioning valve is wide open to the rears right now. A tandem master cylinder serving a dual-circuit braking system and fitted to a vacuum servo unit. Further, the OP indicated he had paid $120 for a brake fluid flush. The loss of brake fluid leads to a loss of hydraulic pressure, so the brake pedal will feel soft or low and go to the floor. Chevrolet Parts | Parts Category: Brakes» Master Cylinder | Chevs of the 40s is the World's Most Complete Supplier of 1937-1954 Chevrolet Classic Restoration Chevy Brakes» Master Cylinder Parts and Chevy Brakes» Master Cylinder Street Rod Parts for your Car and Truck. Could my master cylinder be bad? - Lee. My auto shop teacher says I need a new master cylinder, but it was fine before bleeding the brakes. I say - simply bleed the brakes, pass rear>driver rear>pass front>driver front. I took it to Audi who tried to bleed them and they couldn't, they said they'd done the master cylinder and the VAG-COM ABS bleed. At no point was air introduced into the master cylinder as I kept the resevoir at least half full during the hose/caliper change. I checked master cylinder by screwing in caps, to where the lines go into the cylinder. Sometimes the brake light comes on the dash when this happens as well. Again the brakes felt ok until the car was started and brake pedal went right to the floor. But nothing like before. I have read so many postings about no brakes, spongy brakes, fading brakes and pedals that go to the floor but have not found my problem or a fix that might work. After my brake install I was told it would take a little while for a firm pedal because the brake pads need to seat. When using the brake pedal flushing method, the piston can travel much further down in the master cylinder and contact an area that has never been touched by the piston or its sealing O-ring. 7L L6 - Diesel Catalog. The brake pedal travels all the way to the floor and is SUPER soft. But as soon as I let off and push the pedal again, it goes right to the floor. Again the brakes felt ok until the car was started and brake pedal went right to the floor. Wilwood's clevis and pivot pin balance bar provide smooth and accurate settings of the brake pedal bias. But nothing like before. Please read part one before continuing with this article. [1] This creates a "spongy" feeling when you press the brakes. You may be able to temporarily overcome an internal master cylinder leak by pumping the brake pedal, but the only permanent fix is to either overhaul or replace the master cylinder. I bled my brakes and now the pedal goes to the floor all the time with little stopping power. It still can be push down to the floor (a little bit harder than before). New to me truck (daughter has been driving) recently noticed the brake pedal goes to floor under light pressure while engine is running. Just before the pedal reaches the floor, the assistant should. In turn flipping the seals and stuffing it. The 2007 Ford Fusion has 6 problems reported for brake pedal goes to floor. Also, make sure you pull the brake pedal all the way up when bleeding the brakes to make sure you get the master cylinder to move it's complete stroke. This included: new master cylinder(was bench bleed), new brake lines, new rubber hoses to front calipers, new calipers, new pads, and new rotors. Dodge Ram 2002-2008: How to Replace Brake Master Cylinder. Felt the the master cylinder gave out. pedal the same. Using a flashlight check the level of the fluid or just remove the lid of the reservoir and look inside. took the car for a test spin and everything was fine. I have a firm pedal. Re: Brake pedal goes to floor even after replacing master cylinder (vw-gti_1987) 03-28-2009 02:42 AM #10 Ok, may be a stupid question here, but I have seen it before (when I changed out my firts master cylinder). He said the master was bad. Not getting any air at the bleeders now straight fluid. Take the car into a mechanic if there's reason to suspect the brake master cylinder is leaking. Continual brake failure. It has a mechanical/hydraulic side and an electrical control side. Buy online, pick up in-store in 30 minutes. If your master cylinder doesn't work properly, or only works sometimes, you're going to lose braking power, and occasionally your brake pedal will go all the way to the floor. The truck seems to have good stopping power otherwise but the pedal goes down farther than I think it should. Check for a seized caliper/wheel cylinder, pinched or restricted brake line. Next, have a helper slowly pump the brake pedal several times before keeping it held down. Open the drivers door, and pull the carpet/rubber matt down from behind the pedals. Has anyone else had this problem. Bled brakes, and now pedal goes right to the floor. The duel diaphram clutch is turning into a pain, and I would love for my 242 clutch to work as effortlessly as my 122 hydraulic clutch. After the first time, I had the brake power booster replaced under a recall in late 2016. To remove the master cylinder, disconnect the brakes lines from the. It is acting as if the master cylinder is bad. Dealership initial diagnosis; brake booster & master cylinder, at a cost of 1600 could not figure out why they still have a spongy pedal, now asking for 800 more for a abs module. If the pedal does not gradually sink towards the floor as you continue with constant pressure on the pedal then the MC is more than likely OK. Is air still in the system? I pulled the car out of storage and i noteced the left front caliper was leaking so I replaced the caliper. Pedal feels real good when bled but as soon as i drive it goes to the floor. Centric Parts Brake Master Cylinder 130 42503 Low Price. I remember somewhere reading that this help stops damage to the seals in the master cylinder. they still stop fine just no pedal? master cylinder is brand new and no air in the lines. My first thought was faulty master cylinder or brake booster, but when I went to Autozone the guy there told me I need special scan tool for ABS. After my brake install I was told it would take a little while for a firm pedal because the brake pads need to seat. Here's an additional reason a brake pedal could go all the way to the floor: a bad brake booster. The only thing I did was compress the pistons to inspect the brake pads. Things seeem fine. A lot of air came out of the lines, but there was minimal improvement, the pedal still goes to the floor without much effort. With the car on, pedal just goes straight to the floor. so i got a new napa master cilender. The pedal to floor measurement is 3. Brake pedal goes to the floor. Ships from. It is also used as a brake pedal in conjunction with dual outlet, tandem master cylinders on four wheel equipped vehicles. Gone to three different mechanics. We'd open the bleed valve first, THEN depress the the pedal. Then apply pressure. I bled the brakes again and have some pedal back but not 100%. Replaced the master cylinder bled brakes, good pedal when not running but goes to floor when started - Bleeding brakes on a 95 Silverado after I replace. If this distance is greater than 0. You must get all the air out of all the lines including the master cylinder for the brake system to work. Replaced the master cylinder bled brakes, good pedal when not running but goes to floor when started - Bleeding brakes on a 95 Silverado after I replace. brake pedal. I bench bled the master and did everything right but the brakes still feel soft. so i flushed the fluid and then the pedal would go to the floor. New to me truck (daughter has been driving) recently noticed the brake pedal goes to floor under light pressure while engine is running. If your brake pedal slowly sinks towards the floor when you are stopped with your foot on the brake, or the pedal does not feel firm when the brakes are applied and slowly sinks, your brake system may have a fluid leak or your master brake cylinder is worn out or leaking. After my brake install I was told it would take a little while for a firm pedal because the brake pads need to seat. I had a weeks holliday and came back to the patrol on the hoist new master cyl fitted and front caliper seals and when the engine was idling the pedal sunk. I replaced it with a used part off another car, still had the same issue, then bought a new one and it hasn't changed the problem. 1) After changing the front break pads, the pedal began to sink to the floor. Check the pedal and it is its usual after any brake work and that is a long pedal that pumps up, but goes long again when released for a few seconds. When the brake pedal goes to the floor, if you pump the brake pedal, does the pedal stay higher? If it does, most likly is the brake master cylinder. A few mornings ago I started the 4. If your master cylinder is bad your brake pedal will fall to the floor with the engine off and constant pressure. Replaced with new OE ATE master cyl. Came back from the test drive and and noticed the brake peddle all of a sudden went to the floor. After sitting a few hours it becomes spongy. I've been in a car when this has happened (but it happened suddenly), and yeah, it's scary as all get out. I have a 2004 Kia optima. (10) Check and top off master cylinder reservoir fluid level. But sometimes, like any other mechanical system, it doesn't. Doesn't feel like the common "air in the system" type of pedal fade. Does that mean the front brakes are independent of the rear brakes when bleeding? Btw. We hope you will get complete information about the Centric Parts Brake Master Cylinder 130 42503 Shopping before deciding to buy it. Inoperative valves in the master cylinder are also a reason for service. You can then repeatedly tap the brake pedal against the floor. Don't worry if you break them, your new master cylinder has them. Brake on the el worked when l moved the car in back yard to strip it down an swap all l could to the ef , an l mean they worked like normal. The loss of brake fluid leads to a loss of hydraulic pressure, so the brake pedal will feel soft or low and go to the floor. It looks great mounted on the firewall of any street rod, classic, muscle car or hot rod. Keep your containers for which you purchase Beck Arnley 072-9577 Brake Master Cylinder for thirty days after buying any item. I've re bled it again today and got a few bubbles out, but not a huge amount. I have fitted a new brake system to a series 2 and now I cant get a decent pedal. I start the truck, depress the brake pedalnothing! It goes right to the floor, no resistance. Blended system, first with car not running then with car running. Scared the SHIXNIT out of me. I know that early (1988-1994) accords had master cylinder issues - I have not see any with newer. Likely, your brake master cylinder has failed and you will need a new one and fast. Its about 6 months that the brake pedal feels soft and when I stop at a red traffic light and have to hold the brake down, the pedal keeps going down until touches the floor (within 10 seconds). I have an issue with my brakes where the pedal goes to about 2 inches from the floor before the brakes engage to slow the car. I have a firm pedal. hello, 2006 f150 5. Someone suggested it was a bad master so I changed it after bench bleeding the MC & rebleeding all wheels. I tried pumping them before starting. As title says, front left caliper was Siezed. When the master cylinder goes, you may start to notice signs such as a brake pedal that feels mushy, spongy or unresponsive. Same issue persists. You can then repeatedly tap the brake pedal against the floor. How to replace brake master cylinder in your car. Leaky seals on the brake master cylinder can also cause a soft brake pedal. In other words, the brakes. Continual brake failure. Pedal feels real good when bled but as soon as i drive it goes to the floor. Soft brakes after installing a new master cylinder The pedal is a good bit softer than it was before the new master cylinder. Suddenly, the pedal started to sink. Now after driving about 15-20 min. The brake pedal sinks a bit when the engine is running. Brake pedal has been going to the floor barely slowing the car. You should be able to press the brake pedal, stopping the car. The master cylinder is bad if the pedal is very spongy or goes to the floor. sometimes when you stomp on the pedal hard the brakes will grab hard and then the pedal moves under your foot and the breaks quit grabbing, but its not the. General Brake Booster Installation Instructions. Brake fluid does not compress -water in brake fluid compresses that could be the cause - it is the cheap fix -if that does not fix the problem it is the Master Cylinder. If the pedal slowly goes to the floor under maintained pressure, then a bad master or wheel cylinder(s). When you step on the pedal, the air does not compress so the pedal goes to the floor. Hello there. It still stopped pretty well, and I had a great amount of pedal with it, but it was definitely going out. If the master is fine, connect the line to the front. If the pedal free play is out of specification, adjust the. 3) Hoses, lines, pads - OK 4) Replaced. Porsche 993: Why Does My Brake Pedal Go to the Floor? When stepping on that brake pedal, the last thing you want to feel is it going all the way to the floor or being soft and mushy. The master cylinder is fine if you have a good, firm pedal. until it came out the rear and vice. All of the caliper pistons were seized so I replaced them with new calipers and bled the brakes. Brake pedal goes to floor w/ engine on. While the brakes are up I start the truck and my foot goes right to the floor and I can't pump up. I found four studs and three nuts on an old master cylinder I have, of course I found it after all the fuss I went through on Ebay. Its about 6 months that the brake pedal feels soft and when I stop at a red traffic light and have to hold the brake down, the pedal keeps going down until touches the floor (within 10 seconds). Brake lines don't appear to be damaged, one was replaced after wear but still no change. I have a 2010 Toyota Corolla, S 1. It might be out of ajustment. I bench bled the master and did everything right but the brakes still feel soft. Master cylinder is full. Search how to tell if brake booster or master cylinder is bad. This crap that dealers saying that it is normal for this model is not true. I have a firm pedal. Don't worry if you break them, your new master cylinder has them. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. When I first press the brake pedal, it goes half-way to the floor, but then stops the car very well. Porsche 997: Why Does My Brake Pedal Go to the Floor? The brake system is one of those systems that needs to work 100% of the time. i bench bled it by holding my finger over the front port and pumping the piston. I know that early (1988-1994) accords had master cylinder issues - I have not see any with newer. Hoping to get sine thoughts and some solution to this problem i am having. Seemed like a lot of air came out, but the pedal still goes to floor although it seems to brake better. So I went for a careful drive and the Jeep stops very good, BUT now the pedal has to be pushed all the way down. At no point was air introduced into the master cylinder as I kept the resevoir at least half full during the hose/caliper change. The old booster was hissing pretty bad and the master cylinder was out the back (into the booster). Very low brake fluid or a defective Master Cylinder is the usual cause of this symptom. When the engine is started the brake pedal goes almost to the floor, will not stop car. Soft brakes arise because your vehicle's brake master cylinder isn't able to generate the full pressure required for maximum braking power. Bled brakes, and now pedal goes right to the floor. This is likely not the case; the condition can be caused by the piston sticking in bore of the master cylinder during the bleeding process when the brake system is manually bled. The brake pipes also pass through a balance unit which limits pressure to the rear brakes to prevent the back wheels locking when the weight of the car is thrown forwards during braking. Brakes still go to floor. The final reason for a brake pedal to go to the floor is failing axle bearing. New rotors, caliper, and pads up front. All of the caliper pistons were seized so I replaced them with new calipers and bled the brakes. The block-off method shows if the cause of a low brake pedal is at the wheels or the master cylinder. I checked the booster according to the manual and everything checks out ok. if it gets firm the rear shoes need adjusting, if it goes to the floor press the brake a few times quickly and hold it. If you see a puddle of something on the floor, and a trail of rust and peeled paint leading up to the rod that comes off the brake pedal into a small one inch (or so) metal port, then you need a new master cylinder. If you are able to press the brake pedal to the floor with no ignition, this is a clear sign that the master cylinder has a leak. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. if it is hard than go around to each line to isolate the problem. I appear to have good brakes. After a few minutes, it gets enough pressure in the brake pedal to work normally. No original problem, Replaced the all calipers and when doing that didn' t close one of the valves and it leaked out and dried the master cylinder. I have been working on my grandmother's 1994 Buick LeSabre for almost a month now. You should be able to do that very easily. Does the pedal go to the floor with pressure on the pedal, if so master cylinder. When I picked up the car it felt the same. The brake pedal goes to the floor and must be pump repeatedly to get any pressure. But they have a combination of rust and paint on them. Now after driving about 15-20 min. So he changed out the master cylinder. recently had a guy do my rear brake pipes / lines and he had to replace a cylinder because the bleeder was stripped and rusted in. Don't worry if you break them, your new master cylinder has them. I have spoken to various legal personnel and their view is a case is difficult to prove unless there is some sort of proof. Unfortunately, the master cylinder can wear out. Brake pedal was fine most of the time but occasionally it would sink to the floor while stopping and it would be hard to stop. The master cylinder is fine if you have a good, firm pedal. In some cases, a leak near the vacuum booster or inside the vehicle shows signs of a bad master cylinder. Three weeks later my brakes are doing the same EXACT. We have little information about Centric Parts Brake Master Cylinder 130 42503 Review. Master cylinders should be bled while mounted to the brake pedal assembly. If it goes to the floor, it's leaking somewhere without a doubt. he was dumbfounded after I put on a new OEM master cylinder. In part one in this series, we explain how to test for a low brake pedal by blocking the brake lines. Since then It's got softer when the engine is running and I can get the pedal to the floor. The rotors are in decent condition, no vibration, no significant rust, and pads are fresh, too. we have been power bleeding and bench bled the. These are signs that there is a fault at some point in the braking system. Bad Master Cylinder or Brake Booster As shown in the image above, the master cylinder and brake booster (often called a servo) are connected and work together to stop the car. How to Replace Brake Master Cylinder If your brake pedal is squishy and you don't think your truck stops like it should, read on to learn how to replace an important component, the brake master cylinder. It just goes to the floor and does not want to stop Already Tried: changed brakes cleaned the rotors and master cylinder i do not know if this might have any relation to the anti lock system Answer:. 7" single diaphragm booster, 1" bore master cylinder, and 10-1/2" pedal assembly; For disc/drum and drum/drum applications; 1/2" & 9/16" IFF outlets on the master cylinder (see Related Products for 3/16" hard line fittings) Learn more about selecting the proper master cylinder for your vehicle by reading our tech article, Brake System Selection. Brakes were much better but after a while had to put. Here's an additional reason a brake. Your Store SCA HERVEY BAY Garage Floor Coatings Floor. I bled the brakes three or four times with no affect. It bottoms out, while applying braking, and will recover with a re-pump, but if I hold my foot down, the pedal will sink. Since then, the brake pedal is soft and goes halfway to the floor before engaging brake pressure. You can then repeatedly tap the brake pedal against the floor. When brake fluid is leaking from the seals, the driver should notice a leak at the back of the master cylinder bore. Bypassing the master. 5 seconds then slowly advance. After doing some research I'm thinking either it needs to be bled or the master cylinder is bad. Open the drivers door, and pull the carpet/rubber matt down from behind the pedals. A reliable brake system on your truck is all about hydraulic pressure created by the master cylinder and transferred to the wheels without any issues. Unfortunately, the master cylinder can wear out. This can happen due to a leak which you say is not present, but there are places where the system can leak where it would be visible, specifically the master cylinder. If your master cylinder doesn't work properly, or only works sometimes, you're going to lose braking power, and occasionally your brake pedal will go all the way to the floor. It still stops. I bled the brakes and the master cylinder at least 10 times. I'm sure the new one you can go all the way to the floor but not when they're older. Master cylinder, slave cylinder, and connections for a typical hydraulic clutch. How to diagnose RABS brake system. If this bearing goes bad it will allow the brake rotor it move back and fourth which pushes the caliper piston back into the caliper creating an air gap. I didn't see any air bubbles. If the pedal slowly goes to the floor under maintained pressure, then a bad master or wheel cylinder(s). 8L 1798CC L4 FI VIN: L-2ZRFE engine. when the pedal is depressed 3/8" to 1/2". My pedal seems pretty soft right now. - today took it for a drive (first time in a few weeks) and I have no pedal, it goes to the floor and only have brakes the last inch or so before bottoming out-shop mounted and balanced a FSB set of Alcoas 2 weeks ago but had brakes for a week after that - checked the master cylinder and the fluid is low in the reservoir closest to the firewall. Brake pedal sinks. you are supposed to have 1" of pedal swing before you can feel the rod engaging the master cylinder. He said the master was bad. The diameter and length of the master cylinder has a significant effect on the performance of the brake system. 25" bore master cylinder with the Wilwood proportioning valve. While waiting to pick her up one day, I was holding the car with my foot brake. As the internal leakage was more than likely caused by contaminated brake fluid, a new master cylinder and a thorough brake system flush and bleed are in order. I have bleed the brakes 6 or 7 times starting at the passenger rear and working toward the master cylinder. Adapts either EC-445 or EC-446 master cylinder to the stock brake pedal in the stock master cylinder location on 47-54 Chevy Trucks. Open the drivers door, and pull the carpet/rubber matt down from behind the pedals. So, the only force pushing the pedal back up is the pressure plate itself, pressing on the slave cylinder, pushing the fluid back upstream to the master. Getting the air out of the brake fluid column. I tried pumping them before starting. just something to look at, hope this helps. Brake pedal has been going to the floor barely slowing the car. Does the pedal go to the floor with pressure on the pedal, if so master cylinder. For the last six months or so the brake pedal will get stuck after I press it fully; this happens about 10% of the time. After replacing whole brake system (calipers, hoses, pads, rotors) including EBCM and BPMV (ABS system), I am getting a hard brake pedal when the ignition is off, brake pedal goes to the floor when the ignition is on, and all four wheels cannot be turned. Sounds to me like your brake master cylinder is internally bypassing, a good way to test this would be to invest in some line locks( Vice grips work but are highly not reccomended) and clamp off all of the rubber hoses and see how your pedal feels with the car on , it should be rock hard, if not than you need a master cylinder. I have fitted a new CV master, all new slaves, shoes, copper pipe and hoses. If you are able to press the brake pedal to the floor with no ignition, this is a clear sign that the master cylinder has a leak. And it seems if I pump the pedal a few times it gets harder but then fades after being pressed. Every time you put your foot on the brake pedal, there is a flow of brake fluid that comes out of the master cylinder and goes into each wheel’s braking unit. After sitting a few hours it becomes spongy. After installing news shoes, wheel cylinders, drums, lines and three master cylinders I have no brake pedal. The brake pedal sinks a bit when the engine is running. Hi everyone, just new here, pulling my hair out ( or whats left of it) I had a terrible brake pedal, front calipers are ok as is new rear wheel cylinders, reckoned it was master cylinder, replaced it, bled brakes everything seemed ok, went for a drive and the pedal sank to the floor, re-bled brak. Brake on the el worked when l moved the car in back yard to strip it down an swap all l could to the ef , an l mean they worked like normal. I had a weeks holliday and came back to the patrol on the hoist new master cyl fitted and front caliper seals and when the engine was idling the pedal sunk. If your master cylinder is bad your brake pedal will fall to the floor with the engine off and constant pressure. I just found it really weird that they were working perfectly before, then after this last bleed, they are crap with the car runnnig. With a normal press on the pedal (harder) the pedal is normal until the truck stops, then pedal sinks to floor while sitting still. Low brake pedal 1 Answer. Wilwood Floor Mount Clutch Pedal or Brake Pedal (Wilwood Part # 340-1289). Using slip-joint pliers, gently pull the clutch master cylinder away from the firewall. Low brake pedal after new pads and bleeding? front along with the master cylinder and still had a garbage pedal that would sink halfway to the floor before taking.