Rick's Free Auto Repair Advice

Posts Tagged: brake pedal goes to floor

Test master cylinder

How to test a master cylinder When you apply the brakes and the pedal goes to the floor, most mechanics and DIYers automatically assume they’re dealing with a bad master cylinder (MC). But unless you actually test it, you’re just guessing, because some ABS components can mimic the feel of a bad MC. A stuck open ABS valve to an ABS accumulator can allow brake fluid to flow out of the MC and fill the accumulator. That would feel exactly like a bad MC. Test master cylinder So the only … Read More

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