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1St Use Of Brakes


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#1 Colin T

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Posted 30 December 2010 - 07:24 AM

On my 2000, mk1 Focus 1.8 Zetec I've noticed that the first application of the brakes (foot brake) the brake pedal is very hard and the braking force is negligible.

For the rest of the day the brakes work perfect.

Any ideas on what this could be?

Thanks

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#2 mjt

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Posted 30 December 2010 - 10:02 AM

Sounds like a problem with the brake servo. Can't think what though.

You can test the servo as follows:- before starting the engine pump the brake pedal until it feels hard (to destroy the vacuum). Keep pressure on the pedal and start the engine. If the servo is working the pedal should move down slightly.

#3 Colin T

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Posted 30 December 2010 - 05:11 PM

Sounds like a problem with the brake servo. Can't think what though.

You can test the servo as follows:- before starting the engine pump the brake pedal until it feels hard (to destroy the vacuum). Keep pressure on the pedal and start the engine. If the servo is working the pedal should move down slightly.


Thanks, I will try this tomorrow morning

#4 artscot79

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Posted 30 December 2010 - 07:15 PM

Thanks, I will try this tomorrow morning


Ford Focus 1999 - 2003

Problem: For the first two minutes of driving, there is a particularly hard brake pedal.

Solution: A common problem is reduced brake booster assistance caused by low manifold vacuum. The solution is to fit a new revised brake booster vacuum hose and air cleaner outlet tube and have the PCM (Powertrain Control Module, ECM) cleared of codes and reprogrammed.




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