My Diesel Cmax has a brake issue. Bit scary as it's the missus's car and we have a toddler. You start the car from cold and the brake pedel is stiff as you like. Almost as if the power brakes aren't working. Very little braking effort. Literally 2min later the brakes are working perfect and keep on being perfect. When starting from hot no problems. Then leave it overnight, same problem.

Any ideas?

[Edited on 13/7/14 by Irony]

Start by checking for a vacuum at the servo when cold

As above sounds like a collapsed servo hose or faulty or leaking vacuum check valve, if not could be abs pump fault.

quote:

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Originally posted by britishtrident
As above sounds like a collapsed servo hose or faulty or leaking vacuum check valve, if not could be abs pump fault.

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As it is a diesel, does it not have a vacuum pump somewhere?

No experience, but I have heard some are part of the Alternator.

Maybe the more experienced Ford guru's could comment.

quote:

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Originally posted by avagolen
As it is a diesel, does it not have a vacuum pump somewhere?

No experience, but I have heard some are part of the Alternator.

Maybe the more experienced Ford guru's could comment.

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found this recall - even if yours isn't covered by the recall it could be a similar issue..

http://www.dft.gov.uk/vosa/apps/recalls/searches/expand.asp?uniqueID=24E73DECF50DE9C6802575AF002C8B13&freeText=Blank&tx=