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The brake pedal will sink to the floor when applied and the brake fluid reservoir remains full.

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Q: How do you know if the master cylinder is going out?
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How do you know when the Master Cylinder is going out?

Start the engine. Place you foot on the brake pedal, and press fairly hard and hold the pedal down. If the pedal very slowly, moves toward the floor any at all, the master cylinder is defective. Replace it immediately!!!!!

Where is the brake fluid located on a 94 Nissan Altima GXE?

It's on the master cylinder on the firewall. If you do not know what a master cylinder is do a google on it and get some pics.

I have a 1998 ford windstar 3.8 engine has abs braking system does my master cylinder have a traction or a non traction please help?

From what I know your abs is what has the traction control built in, your abs controls your master cylinder, so if you are having a traction control problem you are going to want to replace your abs box not your master.

What are the functions of the master cylinder and wheel operating cylinder?

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How do you know if it is the clutch master cylinder or the slave cylinder that has gone bad on an 94 firebird?

clamp the line to the slave cylinder and mash the clutch pedal. if the pedal gets hard to push,the slave is bad. if the clutch pedal goes down slowly with moderate pressure,the master cyl is bad clamp the line going to the slave cylinder. meant to say that in the previous answer

What all does the heaters master cylinder control in a car?

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Does the master Cylinder on a 1999 s-10 have a vacuum line going to it?

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Need to know how to replace a master cylinder with abs brakes on a Pontiac grand am?

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How do you know if your Clutch master cylinder is going out on a 2000 ford ranger?

When fluid leaks out the back side where the plunger goes in, it is going out. Fluid would be seen from inside the cab, up above the clutch pedal.