I am having problems with the brakes on this. I cant seem to get a pedal. I have replaced the master cylinder and new lines front and rear. I replaced rear drums along with new pads. I have bled the living daylights out of it and still have no pedal. The rear wheel cylinders don't leak at all and i see no leaks in any lines. This system will not pressure up for some reason and seems to be by passing. any clues?
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Re: any help would be great.
Before you replaced the master cylinder did you bench bleed it? Not sure of your knowledge so I'll explain, whe you replace a master cylinder you need to fill it with brake fluid and push the plunger in and out to get the air out of it this should be done at least half a dozen times before you install it in the vehicle.
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Best case scenario bad vacuum pressure to the brake booster. Worst case bad abs control module or valve body/motor the abs system works by add and removing hydraulic pressure through valves and electric motor. Try using block off plugs at the master cylinder( remove lines plug outlets at master cylinder) check if brake pedal position and pressure is good(if there is no change problem is master cylinder or brake booster/ vacuum) if plugging at master cylinder solved issue repeat procedure at abs valve body after reinstalling lines from master cylinder if your problem returns your issue is in the abs valve body if plugging at the abs solves problem reconnect at the valve body bleed each line one by one testing between each line until you find the problem
lose the fittings at the master cylinder, you should have two of them , one for the front brakes and one for the rear, get a friend to push the brake pedal ( not too hard, be careful they may spay all over) ; and see if any fluid is coming out with his pedal down tight the fittings back with the pedal down,so you don't get any air in the lines. If nothing comes out you have a bad master cylinder.
The extra brake travel can be; 1. air still in the brake lines and need bleeding 2. if there are brake drums on the rear they may be out of adjustment 3. if there are warped brake disc or caliper problems that will add to the brake travel
Section 06-06: Hydraulic Brake System
1992 Festiva Workshop Manual
GENERAL SERVICE OPERATIONS
Read Hydraulic System Bleeding General Information.
Clean all dirt from the master cylinder filler cap.
Fill the master cylinder with the specified brake fluid.
During the bleeding operation do not allow the master cylinder to run dry.
If the master cylinder is known or suspected to contain air it must be bled before the wheel cylinders or calipers.
To bleed the master cylinder, loosen the front line fitting and have an assistant push the brake pedal slowly through its full travel. While the assistant holds the pedal, tighten the brake line fitting. After the line fitting is tightened, the assistant may release the brake pedal. Repeat this procedure on the rear brake line. Repeat the entire process several times to ensure all air has been removed from the master cylinder.
Remove the bleeder screw cap from the appropriate rear wheel cylinder.
Position a box end wrench on the bleeder fitting.
Attach a rubber hose to the bleeder fitting.
The hose has to fit snugly around the bleeder fitting.
Submerge the free end of the hose in a container partially filled with brake fluid.
Loosen the bleeder fitting approximately three quarters of a turn.
Have an assistant push the brake pedal slowly through its full travel and hold it there.
Close the bleeder fitting.
Have the assistant release the brake pedal.
Repeat Steps 9 through 12 until air bubbles cease to appear at the submerged end of the bleeder hose.
When the fluid entering the bottle is completely free of bubbles, tighten the bleeder screw, remove the bleeder hose, and install the bleeder screw cap.
Repeat Steps 5 through 14 at the appropriate diagonal front caliper.
Check the master cylinder fluid level.
If necessary fill it to the correct level with the specified brake fluid.
Check pedal feel. If the pedal remains spongy, repeat the bleeding process or, if necessary, refer to Diagnosis and Testing in Section 06-00.
Did you replace the master cylinder and booster because of this? If so then did this problem follow any maintenance done on the brakes? Was there any leaks prior to the replaced parts? The pedal dropping to the floor with no leaks would point to items you have already replaced or air in the brake lines. Normally though this follows a break job.
It could be that you had a bad master or booster and the brakes were not properly bled after their replacement. This could seem like the same problem but with different sources.
This may seem obvious to some to bleed the system after any work but even if you did this already you should do it again. Bleeding air from the master all the way to the rear cylinders takes quite a bit of time.
Hope this helps but if not please let me know the answers to the questions at the top.