I just replaced a broken brake line and still got no brakes the booster went so I replaced it. I got all the air out of the lines but their is still no brake pressure when the car is on but not when it is off. How can I fix this any thoughts or help accepted.
Their was a gasket ring in the booster box but I was not sure were it was to go so I did not put it in. Is this important to the brake system.
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Re: brake issue on 2000 plymouth neon
Well booster goes pedal would be hard as rock! two legs to stop!>> if your master cylinder is gone pedal goes to floor no pressure it would behave a s if you had air in your lines but you really would not!////////....So tell me this have you pressure tested each individual well for pressure check???light car one side at a time have someone press brake and try to turn that wheel i think you have pressure but not to all if you want me to Gide you keep your request updated I will watch!
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I had my power brake booster go bad and I replaced mine as well as bleed the brakes that when I went and tried them out 'I slammed on my breaks early before getting to close to the light' that my car left skid marks all over that road because the brakes worked like power brakes should and yours sound like your booster was installed wrong or the pads are bad or you didn't bleed all the air out of the line. Your problem you described was like it felt before I replace brake booster ie lousy non power brakes when I had power brakes.
IT is probably a vacuum leak in the brake booster. With the pedal going to the floor There is either no brake fluid or you will have to bleed the system. Replace the booster and bleed the brakes starting at the longest line first
If it does this when you are stopping it could be a strut or a caliper locking up. If it does this when it is idling then it is most likely the Master cylinder or more precisely that vacuum line that runs to the top of the booster having a leak or having too much vacuum. The 2000 had the option of ABS and if you are feeling it in the brake pedal then it could just be the ABS acting up. It was Optional in 2000 and not installed on all models.
The problem is not the booster, the job of the booster is to make braking easier. If the booster went out the brakes would be hard to press.
Your soft pedal is likely due to air in the brake lines. Bleed the brakes and go from there.
SOUND LIKE POWER BRAKE BOOSTER FAILURE.CHECK TO SEE IF VACUUM GOING TO POWER BRAKE BOOSTER.IF NO YOU HAVE BROKEN OR DISCONNECTED VACUUM LINE TO BRAKE BOOSTER.IF POWER BRAKE BOOSTER GETTING VACUUM MORE LIKELY BRAKE BOOSTER HAS A LEAKING DIAPHRAM.
The issue will most likely NOT be dash wiring. Something is still tripped. Most likely is there is a switch that trips when one 1/2 of the brakes fail, like the rear wheel cylinder. Try bleeding brakes, again, including OTHER brakes than the ones that you repaired, allowing this switch to move in the other direction. Watch for the light to go out during this process.
Check for fluid leaks and your brakes. If you see no leaks and your brakes are in good shape replace the brake master cylinder and bleed the system. The air you hear is because the pedal went to the floor. If the booster goes bad the pedal will get so hard you can hardly push it at all. I think you will find if this happened suddenly either you have a major leak or the master cylinder went bad.