Skip to content
View in the app

A better way to browse. Learn more.
Ford Owners Club - Ford Forums

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.



Join the Independent Ford Owners' Club

Our community has been built by enthusiasts, for enthusiasts, and proudly run by Ford owners' for over 18 years. As an independent, non-official club, everything you’ll find here, advice, support, and opinions, comes directly from members with genuine Ford ownership experience.

Join our friendly community... it's Free!

 

Ford Focus Brake Master Servo

Captaintess
Captaintess
in Ford Focus Club

Featured Replies

Hi Guys

Carrying on from my last post, now completed a diagnostic on the vacuum pump all this seems to working, now testing the servo the pressure builds up to 600mm HG after a minute, (seems a bit slow to me) and when the brake pedal is depressed the pressure drops to about 350-400mm HG then takes a minute again to build up! If the brake pedal is depressed several times the pressure drops to zero.

Is this normal behaviour for a master servo or do you feel this a faulty item. I have changed this with a second hand unit and was a complete nasty job.

Thanks for your assistance in this matter.

Kind regards and drive safe

  • Quote


    Moved to focus section

  • Quote

    Is your car petrol or diesel?

    You may want to include the details from "your last post" in this one, it saves people who may be able to offer advice having to hunt other posts for the information.

    I'm going to stick my neck out, based on length of time it takes to build up vacuum (how are you measuring this), and guess your car is diesel and it is a problem with the vacuum pump.

  • Quote
    • Author

    hi, the pressure was tested via the vacuum pump as well as the vacuum hose take off, it is a diesel.

    the method used was a vacuum tester that connects to the hose and pump.

    the recommended pressure is 500mm HG and my pump is chucking out 600mm HG, so by rights this is working.

    Kind regards

  • Quote

    The bit that worries me is you say it takes about a minute to build the vacuum? This is obviously not right. I would have thought more like a couple of seconds would be normal.

  • Quote

    • Latest Deals

    Ford UK Shop for genuine Ford parts & accessories

    Disclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via the club

    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Reply to this topic...
    Go to topic listing

    The "Digestive"

    • The Digestive Forum Roundup (24th May - 31st May 2026)

      Steve ·
      The Digestive Forum Roundup (24th May - 31st May 2026) We hope this email finds you well and enjoying your week. As always, our forum has been buzzing with activity, so we’ve compiled the highlights for you. Plenty of interesting discussions are taking place, especially around the Ford Focus and Fiesta models. Starting off with the Focus, many members have been discussing issues with the Emergency Call System, particularly in the Mk4 model. PLB raised concerns about persistent malfunctions, a se
      Steve
      Steve
      • 252 views





    Background Picker
    Customize Layout

    Account

    Navigation

    Search

    Search

    Configure browser push notifications
    Chrome (Android)
    1. Tap the lock icon next to the address bar.
    2. Tap Permissions → Notifications.
    3. Adjust your preference.
    Chrome (Desktop)
    1. Click the padlock icon in the address bar.
    2. Select Site settings.
    3. Find Notifications and adjust your preference.