Skip the auto shop - Our mechanics make house calls

Q: no brake pedal

asked by on

I replaced the front rotors calipers and pads on the front,And bled them everyway known to working the farthest the the front to doing it with the engine running as well but still cannot get any brake pedal when its running

My car has 108000 miles.
My car has an automatic transmission.

A: Hello. If there is not any air left in the ...

Hello. If there is not any air left in the system then you may have a faulty brake master cylinder.

Many times a master cylinder will fail during a brake bleeding procedure as the piston in the master cylinder travels too far during the bleeding, which can damage the internal seal. It is also possible that air was drawn into the system if the brake fluid got too low. If this is the case, then you may have air trapped in the ABS unit. This can be difficult to bleed out without a pressure bleeder.

I typically isolate the master cylinder by blocking off its lines and then seeing if there is pressure. If not, then the brake master cylinder needs to be replaced.

If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your brake system issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: leaking brake fluid

The first thing to check is to see if you are getting low on brake fluid? The only two possible leaks that it can be where fluid comes out of the brake drum will be brake fluid or rear axle...

Q: I have a 2003 Ford F350 Super Cab dually, rear wheel drive. I am trying to replace the front rotors, but cannot get the old rotor

Your issue is a tough one to give guidance on. If you have researched you have probably heard anything and everything I have to tell you. The only option I see that you may have not tried is chemical solvents....

Q: Poor acceleration and rough idling at times.

This may be related to a dirty or failing idle air control valve, or throttle position sensor. The idle air control valve is a unit that reads the air intake as it is mixed with fuel, prior to being...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.