Peadle goes to the floor with no pressure behind the pedel fluid
Is full and i have fluid to all of the cylinders with no leaks if i pump the breaks i cant build up pressure there was no warning signs i started my truck in the morning and the breaks were out it has abs im stumped oh by the way its a 99 chevy s-10 2 wd 4 cyl
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Re: peadle goes to the floor with no pressure behind the...
You will need to replace your master cyl and bleed your brakes
your master cyl is bypassing inside or the seal are bad inside the master cyl
there isnothing slse in the system that could cause this unless you are loosing fluid.
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If you break fluid level is correct and your break pedal goes down to the floor means that your master cylinder is going bad and you might loose your breaks completely if not checked or replaced. Your breaking system is down to the last O ring inside the master cylinder, once that rubber O rings goes you will not have any breaks at all. Master cylinders have a number of rubber O rings that work like a plunger or piston that produce pressure within the breaking system. When the first one wears down due to age, your pedal begins to loose break pressure and you have to pump your breaks several times to gain breaking. You are now down to the last rubber O ring and a warning that your master cylinder needs to be checked. You can still use your breaks but only for a few days before the other rubber O ring gives out too. Once both O rings give out you completely loose your breaks.
If you haven't refilled the resovoir for the brake fluid and it's running out again you have a leak in hte brake line somewhere. Even if you replaced the brake lines you might still have a leak somewhere. It just takes time to find it
First off make sure you have brake fluid in your reservoir. Secondly if brake fluid is at the full line. I would try bleeding the brakes. This takes two people. On each cylinder there is a bleeder valve. Start with the drivers front with the engine off have somebody pump the brakes 3 or 4 times then hold it to the floor. open the bleeder valve and the break will go to the floor shut the brake bleeder valve. And repeat 2 more times. " MAKE SURE YOU CAN CHECK YOUR BRAKE FLUID AT EACHthe STEP AND REFILL RESERVOIR AS NEEDED".Then move to the next 3 until complete. If this does not fix your problem most likely you have a bad master cylinder. Good luck.
check the master cylinder. it can go bad without leaking. the fluid bypasses the internal cups causing a fall in the pedal. also if you broke the lines lose to do calipers you might have air in the system bleed it good. if not i suspect the master cylinder
You have to check that rear brake cylinders doe's not leak fluid. Check your master fluid reservoir when you pump the brakes.
You have to bleed air from the system, and check the vacuum hose at the master brake cylinder.
Check the reservoir to be sure the fluid is full. If not, top it off and try it again. If there's still trouble building pressure, pump the brakes a bunch of times, and then check around each wheel for fluid on the ground. If you see none, it's possible that you have a break in the line somewhere through the chassis and that the fluid is leaking out inside. If you see no evidence of leakage, and the reservoir is still full, you need a new brake master cylinder - what will have happened is that the diaphragm around the plunger inside the master cylinder (which moves through the cylinder when you push the pedal, and forces fluid out to the wheels) has a hole or tear in it, so instead of pushing the fluid out to the brakes, the plunger simply moves through the fluid. It never builds pressure, and your brakes don't work.
You should be able to look around each tire and see where it is coming from, let me know if any of them have brake fluid on them, if so it is a brake cylinder leaking, if the leak is somewhere else than I may can help you with that, oh and when you do find the problem I can probably save you some money on the repairs.