Help! No brake pressure on a 92 Accord but the fluid is at a good level. Pedal goes straight to the floor
On a 92 Honda I would think that it was most likely the master cylinder. It most likely has an internal leak that is caused by a worn out seal. Other things that can cause this are a bad brake hose that expands when you depress the master cylinder by way of the brake pedal. another problem but less likely because you said that the fluid level is up is a bad piston in a brake caliper or a bad wheel cylinder in the back brake assembly. Also a bad power booster can cause a spongy brake pedal. All of these things could cause the problem that you are having which is not necessarily air in the lines but lack of hydraulic pressure.
Sounds like you have air in you lines. Bleed your brakes first. It is the cheapest way to eliminate a possible cause Basically there are only a few thing in the brake system that can cause this problem. Master Cylinder, Booster, Hard Lines, Soft lines and Calipers. A leak in any one of these could cause the problem. But typically a leak would lead to LOW FLUID LEVELS in the tank. You said that the level was fine. Fluid is thicker than air so it is possible that a seal is worn enough to allow air in to the system and not allow fluid to leak. Bleed the system first and see if that takes care of the problem then go from there. Each caliper has an Air bleeder valve located on it. You will need to get one of those brake bleeder kits from the local auto shop. This way you can do it by yourself. It is very simple and even comes with bleeding instructions. Basically you remove the rubber cover connect the smakk hose and container to the valve and loosen the valve then Pump your breaks a few times. It does help to have someone else helping you as one person can watch the fluid level and bleeder valve while the other one pumps the break You want to make sure the fluid level doesn't drop below the min mark in the resivor You want to pump the brake until a solid stream of fluid comes out first few pumps may have bubbles in it. Bubbles are BAD Lock it down once you see the solid stream Once that is done complete the same for all your brake calipers. Make sure you keep your eye on the fluid level in the tank. if it falls below the mark you risk putting more air in the lines and have to run through this all over again. The brakebleeder kit is not 100% necessary, but it does make it less messy and give you the option to do it bay yourself if you have to.
