Soft Brake Pedal After New Master Cylinder

Spongy brakes, they replaced the master cylinder and still spongy. Or for that matter, any BMW model. Push down slightly, release and then push. 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. Hi, I have a suggestion based on experience of weeks trying to get a firm pedal after replacing calipers, pads, lines, and master cylinder. My 2005 Camry XLE also had similar soft pedal, and I was due for brakes. If you have to press the brake pedal all the way to the floor to bring your vehicle to a stop, this might be why. After job was complete the brake pedal was soft?? Almost like the master cyl. If you replaced your master cylinder with one that has a bore that's smaller than the brake fluid requires then you'll get a very poor brake pedal feel. BMW E53 X5 Brake Fluid Bleed/Flush DIY by hayaku for xoutpost. The master cylinder is the heart of the brake system – it is what holds the brake fluid and feeds it to the front and rear brakes. Next on the list is the brake pedal. Three days and $100 later the diagnosis was that it needed a new master cylinder. Inside the frame of the willys jeep, remove the cotter pin from the pedal shaft next to the brake pedal arm. Any thoughts? Seems like it would involve the vacuum servo since it happens with the car running. Brake pedal has been going to the floor barely slowing the car. Your car has a brake servo, with a large Master cylinder. During normal use brake fluid can become contaminated and the master cylinder wears internally but only for the length of your brake pedal travel. when the pedal is depressed 3/8” to 1/2”. I checked behind the master cylinder, no leaks. Since the brake job, I've been getting a squeak from the brake pedal and the pedal action is poor. And when it does as I said the pedal pressure is weak. I have a 2004 Kia optima. The problem is that no matter how long we bleed the brakes we are still only getting a soft pedal that is about 1/4 off 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 ford dealership - Answered by a verified Ford Mechanic. 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. If a full firm pedal is encountered, reattach the lines, bleed and proceed with the test. At only 27k everything under the hood looks brand new. Thanks, Lord Snax. your Oddy definitely have Air pockets in the braking system that if the issue did occur right after the replacement. Ive had it with my truck. The road outside of my daughter’s dance class is very steep. Screw the supplied fittings into the outlets and place the tips of the tubes in the fluid in the reservoir. The master cylinder is full, and I have never added fluid. My pedal would firm up as long as I let my foot off a little and pressed it again. In my situtation, my pedal started to feel soft and like it wouldnt respond like it once did. Spongy Brake Pedal Sign in to follow at before you go putting a new master cylinder in. I am running the 7/8" master cylinder and proportioning valve is wide open to the rears right now. Air in lines? Bleed nipple threads within caliper borked so new Pagid item now on. Corrosion inside that wheel cylinder can cause brake fluid to leak resulting in a loss of hydraulic pressure. Soft pedal is usualy caused by a leak, bad flexible lines, calipers leaking or badly blead master cylinder. so once you only slightly depress the brake pedal brake booster knows (there is a valve) that you need. Hello I have a problem with soft brakes on my 83 C-10. It goes down farther than it should and feels spongy. Next we disconnected the battery and spliced the two new wires into our existing. and switched to the then new EBC NXT pad material. This is usually centered around the master cylinder but can also be contributed to other components in the brake system like wheel cylinders or calipers. Curing a soft brake pedal on a Jeep Cherokee. Install the new cylinder and adjust the eccentric nut for clutch pedal height. Im ready to just drive my truck into a wall. I converted from a non power brake setup to power brakes. If the pedal is firm and hard, the master cylinder is good. bleed the brakes using the scanner. (It took more pressure on the pedal for the brakes to actually work) Your master doesnt have to be leaking for it to be bad and not working efficiently. BRAKES INEFFICIENT (a) Linings not “bedded-in” (b) Linings greasy (c) Linings incorrect type. it only gets soft when the motor is running and. New master cylinder which I bench bled 2 different times, no difference, still spongy. You're driving along and notice your brake pedal seems soft. I noticed that the brakes were not as firm as when the new plugs were installed on the modulator, they felt soft and would go down to the floor quite a bit. I have put in a new master cylinder and brake booster but that did not make any difference. I drove to frontier Ford dealer and the technician said it's the master cylinder which was a wrong diagnosis and after replacing the master cylinder the brake was soft and went half way to the floor. over a diaphragm this vacuum is used to move an axis in the middle of brake booster. The Haynes manual warns that master cylinder problems can be created by pushing the piston back. Friend had master cylinder replaced, brake pedal still soft? They're very soft, you almost have to go to the floor to get a decent bite. Car stops fine but pedal still doesnt feel right. did not like the first three-four pump ups to build somewhat pressure. When I put the brake on to start the pedal moves about an inch, inch and a half but is not rock hard. Plug the outlet ports. How to diagnose a sinking, low or spongy brake pedal. These seals wear in time and fluid pressure begins to bypass the seal causing the pedal to sink towards the floor. The block-off method shows if the cause of a low brake pedal is at the wheels or the master cylinder. 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. Tests to find causes of a low brake pedal. On most cars, the clutch master cylinder is a single unit with its own fluid reservoir. Tightening torque: 7) Using water, wash off the spilt brake fluid at the master cylinder surrounding, then wipe up the wa-ter. 2005 Toyota sequoia. You just keep pumping the brake pedal about 10-15 times, refill the master cylinder, then repeat. If before, then you might have a worn out in the Master brake cylinder. The master cylinder is the usual suspect due to the internal seals having failed. Begin by isolating the master cylinder. I have replaced all brake lines, front brake hoses, I replaced master cylinder three times, all calipers, brake booster, and even the proportion valve. afterwards brakes were spongy, go all the way to the floor, braking was weak. Common Causes of a Spongy or Soft Pedal: Brake fluid leaks; Worn out brake hoses; Air in the system; Contaminated brake fluid. Prior to Buying ACDelco 18M391090 Professional Brake Master Cylinder, research websites offering coupon codes, for example coupons. You can find excellent coupon codes from each retailers and manufacturers, which could frequently help you save a great deal of cash. hello, 2006 f150 5. My problem is brake pedal pressure. Your master cylinder and booster are probably fine. Remove the master cylinder top and fill with fresh brake fluid to the appropriate level as. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Of note is that its typical for a 4 wheel disc brake system to have a less firm pedal as compared to front disc/rear drum. Three days and $100 later the diagnosis was that it needed a new master cylinder. we just had the rotors turned and now have a soft pedal. Hey All, While moving a friend my brake pedal got super soft and went, practically, to the floor. Soft brake pedal after replacing the brakes and rotors. The rotors were good, no problems there. I have a 72 C-10 with a 350, auto, a/c, ps and power front disc brakes and I am having a serious problem getting a good brake pedal after replacing the master cylinder. I've replaced the master cylinder, the booster, the rubber lines and the calipers so everything up front is new. Te brakes were originally soft but i was under the impression that they were soft because the pads were worn out. And bleeding it and the lines. All I got was super spongy brakes (all the way down), so after bleeding the heck out of all the wheels maybe 5 times without getting any brakes, I replaced the Master Cylinder. How do deer adapt to grasslands? 436 want this answered. Disconnect all hydraulic lines from the Hydro-Boost unit (pressure, steering gear and return lines). I picked up a vacuum bleeder a while back to bleed brakes. Replaced all rotors, pads, lubed sliders, calipers squeezed in fine and the rears screwed in good. If the master cylinder is replaced, care must be taken to prime the new master cylinder by removing all of the air and completely filling it with. Just pull them out of the top of the master cylinder and watch the fluid run out. A couple of ways to check. BY HAND, slowly depress the brake pedal. So today I replaced the caliper and pads, when replacing the pads on the other side that caliper was seized, go figure. Spongy brakes, they replaced the master cylinder and still spongy. there is a. The brake pedal is still very spongy after we've bled it at least 5 times in the last 3 days. Brake failure after changing pads. After my brake install I was told it would take a little while for a firm pedal because the brake pads need to seat. The master cylinder is supposed to be for a power brake booster, but in this case, it's used manually without a booster. After you’ve successfully bled your brake system, does your pedal continue to feel spongy or are you still not getting the performance you need out of your brakes?One of the first things you can check is the integrity of your booster and master cylinder. When pressed all the way down they stopped the truck fine and I was impressed with it but over a short amount of time (maybe 500 miles) the pedal firmed up. sprinterguru Posts: 24. WD 40 and 13mm socket and ratchet + 13mm closed end wrench. Once the system is all reconnected, release pedal and gravity bleed the system. Rear brake shoes adjustment. 1997 mercury sable gs 3. I came to a hard stop from 65 without ABS kicking in. A “no brake pedal” condition can be encountered after a new master cylinder is installed, leading the technician to believe that the master cylinder is defective. The Haynes manual warns that master cylinder problems can be created by pushing the piston back. These MC's are used on all brake systems in C/K type vehicles and many other models. When brakes for many old cars were manufactured, using asbestos on brake shoes was the norm. A few simple tools and an understanding of the system are required for finding the cause of a low brake pedal. I was used to experience this in cars as old as the 1949 Fords. A mild soft brake pedal after replacing Pads and rotors is normal but what you have is completely abnormal since you have stated that the pedal went far down to the end. If this distance is greater than 0. I noticed this after I had an "accident" while flushing the brake fluid - I was stupid enough to let the master brake cylinder take some air; I bled the master cylinder and the lines twice after that, and the brakes seem to operate like before, but that pedal that goes down!?!?! not sure is it was the same way before. but the pedal still sinks slowly to the floor. Add Complaint but after that activation the brake pedal felt very soft and would not engage the brakes until the very end of the pedal travel. I also replaced the master cylinder thinking that was the problem but 2 days after i changed the cylinder the pedal became soft again and the car seems like its only braking on one wheel (hence it is pulling to the left when braking). Then bolt your M/C back into your Cruiser and connect the brake lines to it. The problem is that no matter how long we bleed the brakes we are still only getting a soft pedal that is about 1/4 off the floor. However, I do have information on how you can solve a spongy brake pedal on one of. I had a caliper go bad yesterday and I put my foot on the brake and the pedal went to the floor, fluid all over the driveway. NOTE: When a new brake master cylinder (2140) has been installed or the system has been emptied, or partially emptied, it should be primed to prevent air from entering the system. R+R both front calipers. If it still is soft, then you will have to replace the master cylinder and bleed all the brake components again. Others have asked similar questions after bleeding the brakes and it has ended up with their master cylinder needing replacement or new seals, this is because the master cylinder was in a tired state before they started and the extra travel of the bleeding operation made the seal condition worse than before, such a master cylinder has no place. So did a pad slap just beacuse I was there. The master cylinder is located on the right corner of the firewall. 98 GMC C1500 Sierra 5. This shouldn't be a problem if we know how a master cylinder works. Whether using our products or those of another company, the first thought people generally have is that they have a bad master cylinder. There is a cavity between the two walls about the width of the rubber boot on the master cylinder. but the pedal still sinks slowly to the floor. You're driving along and notice your brake pedal seems soft. Spongy Brake Pedal. My cars brake pedal goes soft after about a week of sitting in the garage. The dealer does a multi-point inspection looking for ways to boost up the bill. 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 installed a whole new brake system (front-to-rear. Best Answer: Normally a soft or spongy feel to the clutch when the pedal is depressed is the result of air in the system. But good braking the opposite can kind of be true where you have an extremely soft pedal where the brakes are real grabby. I have a 2016 S60 2L turbo I bought as a CPO at 32,000 miles and I've put 10,000 miles on it in one yr of use. The independent. I noticed with the left caliper off, and pumping the brake, that it the piston came out very very slowly. hello, 2006 f150 5. Bleeding twice and changing out the fluid didn't help. The pedal on this van has never felt as firm as any of my others. Bled the brakes between runs with no sign of improvement. I would be suspecting an external leak. I am not sure how long this takes to accomplish proper brake pad seat. I have the same problem with my brake pedal on my 79 model with 4 wheel disc. After you’ve successfully bled your brake system, does your pedal continue to feel spongy or are you still not getting the performance you need out of your brakes?One of the first things you can check is the integrity of your booster and master cylinder. This can be a issue with the condition of the brake fluid, I would recommend a flush of the braking system entirely and rebleed all the brake slave cylinders at the wheels (furtherest away first). Today's problem, my '94 IDI Turbo F350 FWD crew cab has the sinking pedal problem. Soft brakes after installing a new master cylinder The pedal is a good bit softer than it was before the new master cylinder. Since the brake job, I've been getting a squeak from the brake pedal and the pedal action is poor. Soft brake pedal after YJ booster upgrade - FIXED FIXED - UPDATED: Well after reading the posts numerous times VANCOPBS was correct (he is in the brake business after all) in that my problem was the rod between the Master cylinder and the brake booster. In the past 6 months I've replaced the master cylinder, pads and shoes, caliper on front passenger side, and bleeder screw on the drivers rear side. However, after a stop if I continue to press on the Brake Pedal it will travel down an additional 1 inch or so - it doesn't take a great deal of pressure. Disconnect the Hydro-Boost pushrod linkage from the brake pedal. Im ready to just drive my truck into a wall. If you pump the pedal and it goes firm but slowly drops while you hold it you may have an additional leak somewhere or you could have a bad master cylinder. It pushes the brake fluid where it needs to be to help bring your car to a stop. In truth, this is a video about how to replace and bleed a master cylinder on a C1500, 1990 5. WD 40 and 13mm socket and ratchet + 13mm closed end wrench. Upon replacing brakes, found 2 calipers stuck. your Oddy definitely have Air pockets in the braking system that if the issue did occur right after the replacement. After taking it for a test run, it was obvious that the brake pedal was very soft. Recently my brake pedal has been sinking nearly to the floor. We ran out of light, so tomorrow we're going to. Something is obviously wrong, and you need to find out the cause. However, my brake pedal is still mushy and goes to the floor easily. Yes, I am referring to 1 inch of brake pedal travel before actually biting. The excess fluid did return to the master cylinder which I removed via a turkey baster. When the master cylinder was replaced were the brake lines bled? The soft pedal and almost no pedal until pump it, surely sounds like air in the brake lines. Fill it with brake fluid and screw in the bleeder. When you press on the brake pedal, the seal will hold & your brakes will work, but because the seal has tiny tears in it, a minute amount of brake fluid will bleed by them, causing a soft pedal. N/A Fluid in brake reservoir has dropped below the level of the hose going to the clutch master cylinder. The problem is that despite countless bleedings, the brake pedal remains very soft. Ive tried just about everything to get rid of it so I hoping some of yall can help. Unfortunately, the master cylinder can wear out. If the master cylinder is good, the pedal should be rock hard—barely moving—with the ports blocked. Any one ever experience this? have any suggestions? DIY for a master cylinder replacement? Thanks PS. Lately it does not seem that abs is engaging. bleed the brakes using the scanner. 2) If the master cylinder is new or went dry at any time during the installation, begin by bench bleeding the master cylinder. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. The master cylinder is full, and I have never added fluid. We changed the master cylinder due to the squishy pedal, after an initial bleeding. Proper caliper bleeding process was followed (furthest from the master cylinder first, to the closest). My wife is all too familiar with PRESS/HOlD/RELEASE the brake pedal instructions!!!. The master cylinder is the heart of the brake system - it is what holds the brake fluid and feeds it to the front and rear brakes. Feels more like a mechanical disconnect from the master cylinder. You can use an alternative spacer, if necessary. After suspecting a bad master cylinder, I bit the bullet and got a new one and changed it over (hell of a job). For in-vehicle priming, disconnect the brake lines. I have changed pads all round to Ferodo ds2500, and done a full fluid flush, all new ap fluid now in the system, bled the brakes twice, but still the pedal was too soft for my liking, goes down about half way, but holds and doesn't sink to the floor. Your car has a brake servo, with a large Master cylinder. I question the master cylinder, brake booster, and ABS brake system (only because I'm not familiar with it). Hi I have been off roading at a site today and have noticed that the brake pedal felt soft and went down further before getting firm. Why is the brake pedal still soft in your 1994 Plymouth Sundance 2. Followed all the lines from the master cylinder to all four wheels, no sign of a leak. My pedal seems pretty soft right now. there is one input = vacuum from engine. 4 …change the calipiers,brake hose, booster was leaking when pedal was pressed,new master cylinder was replaced twice thinking it was a bad master cylinder from auto zone. Three days and $100 later the diagnosis was that it needed a new master cylinder. This condition will be accompanied by a brake pedal that is soft and slowly sinks towards the floor. I bled the master cylinder on the truck with the plugs in where the lines would go and had someone push the brake pedal till no more bubbles came up in reservoir. If the master cylinder is bypassing, the pedal will go down. This was not the case before the brake job. The rear i bleed using thr bleeder screws, the fronts i wound up bleeding using the line. Ive tried just about everything to get rid of it so I hoping some of yall can help. start at the wheel furthest away from the master cylinder, get someone in the car to push on pedal, crack the bleeder until the fluid stops and tighten the bleeder all while the pedal is down. I bled the hell out of the system and no air bubbles left. few things going on here: Installed just the front pads two days ago. My pedal feels "soft" (which I'm assuming is good), but it just seems like they should be a lot more sensitive. When bleeding by pumping the brake pedal, it's best to put something like a piece of 2x4. If a full firm pedal is encountered, reattach the lines, bleed and proceed with the test. I have replaced both calipers,pads,brake line and the master cylinder. On Saturday, I took the master cylinder back and exchanged it for another one ('67 dual master cylinder for disc brakes). i bench bled master brake and bled brake right rear left rear right then front. Worn or ill. The brake pedal travels all the way to the floor and is SUPER soft. Brake pedal is now really soft, but still have brakes. Everything solid ever since with nice tight brakes. Obviously it is a no-brainer to fix or replace the master cylinder. SOURCE: Brakes are still spongy after changing the pads, one caliper, and master cylinder. If you have to press the brake pedal all the way to the floor to bring your vehicle to a stop, this might be why. Now after bleeding both fronts the pedal is still really bad. I also have a soft pedal after new master cylinder and calipers. Any presence of bubbles in the reservoir. Spongy brakes are a result of air getting into the brake system, which can happen from leaks in the. from the master cylinder with sufficient force to cause personal injury. This can be a issue with the condition of the brake fluid, I would recommend a flush of the braking system entirely and rebleed all the brake slave cylinders at the wheels (furtherest away first). Possible Causes of No Brakes (Brake Failure). However, the brakes still feel softer than Im used to as compared to the 3 other vehicles I own (and many others I have driven). CLUTCH-02: Broken. Thus, causing the pedal to get soft and doughy or slowly sinking to the floor. In my situtation, my pedal started to feel soft and like it wouldnt respond like it once did. The master cylinder is supposed to be for a power brake booster, but in this case, it's used manually without a booster. I figure I can do this by connecting the two ends of a short brake line to each of the outlet ports of the master cylinder. I dont see any visible leaks, fluid filled to reccomended. If the pedal is hard to push then maybe booster. Bleeding the Master Cylinder. This can be a issue with the condition of the brake fluid, I would recommend a flush of the braking system entirely and rebleed all the brake slave cylinders at the wheels (furtherest away first). Hello everyone. The master cylinder was leaking in the little space between the firewall and the inner wall where the master cylinder and brake pedal come in contact. I'm 99% sure there are no leaks, I've left her sit for a couple weeks after bleeding the brakes and there isn't a drop of fluid anywhere on the cement under the car, and the level has remained full in the master cylinder. I bled the brakes three or four times with no affect. Air-Cooled. R+R both front calipers. They said it could be the HCU. I was also wondering if i need to bleed the brakes. Got the spongy pedal after new pads were put in. The ford dealership - Answered by a verified Ford Mechanic. If I pump the brakes it becomes hard and if I continue to hold the pedal it sinks down a bit. 00” and 1-1/8”; and 2 finishes: ball burnished and black e-coat. This is a recent and fairly sudden development. (after i bleed the brakes everything works very good but only for about 3-4 days and the pedal becomes soft again). The first step is to isolate if the problem is with a wheel or the master cylinder. Ive had it with my truck. If the pedal sinks to the floor or is excessively spongy then the problem is. Brake failure after changing pads. Recently my brake pedal has been sinking nearly to the floor. I just acqiired it it had a soft, spongy brake pedal. I bled the hell out of the system and no air bubbles left. from the master cylinder with sufficient force to cause personal injury. Something is obviously wrong, and you need to find out the cause. Any ideas?. I was also wondering if i need to bleed the brakes. My guesses are the calipers where not bled properly, the master cylinder was not bled properly, an unforeseen leak appeared, or maybe, just maybe, the master cylinder was bad out the box?. When you press on the brake pedal, the seal will hold & your brakes will work, but because the seal has tiny tears in it, a minute amount of brake fluid will bleed by them, causing a soft pedal. I tried pumping them before starting. After all that we did your basic pump brakes and bleed all the lines, but ever since then it was still a squishy pedal. Slave cylinder: 10mm flare nut brake wrench (like a closed end wrench with an opening). Today I had the soft pedal issue after brake fluid change, but I fixed the problem quickly, thanks to the information about master cylinder bleeding nipple found here. The booster applies a vacuum assist to the pedal - a faulty booster will normally manifest itself as non-responsive brakes - not a spongy pedal. Bit of a question, does the brake pedal on your Rav 4 feel a little long, or spongy? We bought our 2003 Rav 4 about a month ago and the brakes are Ok, but I just get the impression they could be better. The master cylinder is the usual suspect due to the internal seals having failed. start at the wheel furthest away from the master cylinder, get someone in the car to push on pedal, crack the bleeder until the fluid stops and tighten the bleeder all while the pedal is down. Hey Guys, I am been plagued by a spongy brake pedal ever since I built my car. Here is my problem. General Brake Booster Installation Instructions. I didn't have any air left in the lines that I seen. Replaced master cylinder and bled. Master Power Brakes recommends that the distance between the pin from the booster and the hole in your master cylinder be approximately 0. Pull off the rubber cover on the bleeder valve. If the pedal sinks to the floor or is excessively spongy then the problem is. I replaced the front pads on my girl's 2013 3i yesterday, and didn't have any issues. The valves keep the fluid in the calipers from siphoning back into the master cylinder when you let up on the brakes. I question the master cylinder, brake booster, and ABS brake system (only because I'm not familiar with it). Possible Causes of No Brakes (Brake Failure). As title says, front left caliper was Siezed. 00” and 1-1/8”; and 2 finishes: ball burnished and black e-coat. Depending on the model, you might have to bleed the brakes while the car is running. It has the 6 cylinder and automatic transmission so everyone in the family can use it. I still have a soft pedal that I think travels too far to the floor. I drove to frontier Ford dealer and the technician said it's the master cylinder which was a wrong diagnosis and after replacing the master cylinder the brake was soft and went half way to the floor. 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. Cause the brake pedal was locking up after 10 min. So, in my mind, this leaves only two situations that would cause a the brake pedal to sink to the floor - an internally leaking master cylinder (even though it is new) or an external leak that has not been found yet. We ran out of light, so tomorrow we're going to. over a diaphragm this vacuum is used to move an axis in the middle of brake booster. This is needed so you do not bottom out pistons in the master cylinder and cause internal master cylinder leakage. R+R both front calipers. I converted from a non power brake setup to power brakes. Then when you bleed the brakes manually the seal passes over this corroded area and chews itself up. So I Had it replaced. Suspected it was a bad master cylinder, replaced master cylinder. So checked the brakes pads and have over 45% of pad left. The ford dealership - Answered by a verified Ford Mechanic. Brakes were soft after the repair. I suppose I can try bleeding the lines again, but I'm just confused why after pumping the brake pedal 8-10 times and then opening the rear bleeder screws, there isn't more pressure shooting out like in the front brakes. Te brakes were originally soft but i was under the impression that they were soft because the pads were worn out. He said the master was bad. How to Replace the Master Cylinder You press the brake and the pedal goes to the floor. Try to Pump the Pedal. this resets the proportioning valve and returns the pedal to correct height and feel. We bled the brakes and still the same. Put in new master cylinder, no change. It pushes the brake fluid where it needs to be to help bring your car to a stop. Universal Manual Pedal Assembly Manual Master Cylinder - GM 1994 up 11" Delco Style Dual Diaphragm Power Brake Booster Exact New Delco. It looks like ABS could make a soft pedal if some of the return/relief valves are leaky. Have to floor brake pedal to stop the car. I have not driven the car yet since doing the brakes. Honda Civic: How to Bleed Your Brakes. bled front brakes. After job was complete the brake pedal was soft?? Almost like the master cyl. I saw a brake master cylinder fail where the seal got messed up in a really weird way. Recently my brake pedal has been sinking nearly to the floor. The excess fluid did return to the master cylinder which I removed via a turkey baster. I did not know that Honda only wants you to go 1/2 way down with the brake pedal when bleeding the brakes, and so my wife/assistant pumped using the full travel of the pedal while I worked the bleeder valves. Brake Hose May Cause Low Pedal All vehicles with power brakes. when the pedal is depressed 3/8” to 1/2”.