Q: I have spongy brakes

asked by on November 02, 2016

I have replaced all pads calibers master cylinder and booster. I have to pump the pedal to get good braking. I have bled them several times and pressure bled them.

Hello there. Many common faults could cause your vehicle to have spongy brakes. You have done well so far in replacing all the parts and bleeding the brakes. Without knowing your vehicle’s make and model, I can only offer general advice. Common causes for spongy brakes are a faulty vacuum brake booster, a faulty booster check valve, a faulty ABS module, a leak in brake system, or a vacuum leak. A qualified technician, such as one from YourMechanic, will be able to determine what is causing your spongy brakes and make any repairs required to get your vehicle stopping normally again.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Instrument cluster not working.
Hi. One of the instrument cluster power supplies comes directly from the ignition switch, which is also bolted to the ignition lock cylinder housing. It is possible that either the ignition switch is faulty or that the wiring on the...
Transmission leak stuck choppy - 2005 Mercedes Benz C55 AMG
Hello. From the symptoms you describe, it would appear that the vehicle is experiencing issues that have put it into limp, power reduction mode. If the TCU requires replacement, it can usually be found in the engine bay on the...
Vehicle hard starting & fuel economy issue.
Check for proper fuel pressure - both while the vehicle is running, and after running. I suspect you will find that fuel pressure is not being maintained in the pressurized portion of the system due to a fuel pressure regulator...
Car will not start - 2010 Mercedes E550
Hi there. The job of the starter relay and the fuse that supplies power to it, is to activate the starter motor to spin when the ignition circuit has been activated. Since you've hooked up a battery (by attempting to...
What is the specific torque for the rod bearing of a 2001 Acura 3.2 TL?
Hello, thanks for writing in about your 2001 Acura TL.According to AllData, the specifications are: Connecting Rod Bolt Torque 20 N-m (2.0 kgf-cm, 14 lbf-ft) If you end up needing any help with your vehicle, consider YourMechanic, as one of...
No start problem on my 99 Dodge Ram diesel
Diesel engines rely heavily on glow plugs in cold weather. Diesel fuel tends to thicken in cold weather, so the glow plugs heat the combustion chambers as well as the fuel as it enters the combustion chambers. The Cummins engine...
I have a 2013 Chrysler 200 and i just got the radiator changed but the gage still risies very high, could that mean i need a therm
Hi there. When you have an overheating problem after replacing the radiator, it can be caused by several different issues ranging from an obstruction in the coolant lines or heater core, the coolant having air bubbles in the lines, cooling...
My reservoir is empty every two days but my radiator is still full.what happens?
If you have to keep adding coolant to the reservoir then you have a leak somewhere and would need to have the cooling system pressure tested to locate the leak. If there is no leak externally then you may have...
Truck runs good but if I step on the gas it chokes and rpms go crazy
This is generally something caused by a lack of fuel or air, such as a dirty or faulty idle control valve or in some cases an improper signal from the throttle position sensor. What you are describing sounds like a...

Related articles

Can a Leak in the Brake System Cause Total Brake Failure?
Although Although there are several issues that can lead to total brake failure, the most common one is some form of brake fluid leak. When a brake leak is present, it affects the fluid pressure in your system. Since it...
How to Buy a Good Quality ABS Control Module
The The ABS (anti-lock brake system) control module, which is also known as an EBM (electronic brake module) or EBCM (electronic brake control module) works almost like an engine control computer. This microprocessor receives input from sensors to prevent wheel...
Symptoms of a Bad or Failing ABS Fluid Level Sensor
Common signs include the ABS Light coming on, unexpected wheel lock from the ABS system failing, and low fluid in the reservoir.