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!

 

Focus 1.0Ecoboost rough idle when cold

Ajjones325
Ajjones325
in Ford Focus Club

Featured Replies

Hi all, 

 

My Mk3 Focus 1.0Eco boost has been rough idling when cold for several weeks now, once warm it seems OK. I've had the injectors out, changed the seals n given them a good clean out and they seem to be spraying fine. Changed spark plugs, cleaned sensors n filter and it's still not any better, in fact it's actually started to pick up a misfire now on both 1 & 3 piston.  One thing I have noticed is that the start stop isn't working, I've checked battery voltage n it's reading around 12v. 

 

Has anyone had this issue before? 

  • Quote


    45 minutes ago, Ajjones325 said:

    One thing I have noticed is that the start stop isn't working, I've checked battery voltage n it's reading around 12v. 

    Has anyone had this issue before? 

    Do a forum search on 'stop start', everyone with that 'feature' has issues! Your voltage does appear to be a little light, charging the battery should kick start the function into action, but it will eventually fail again...

  • Quote
    • Author

    Just found the p053f fault code and checked battery voltage and its sat around 11.9v this morning,  I reckon the battery's on its way out causing the LP fuel pump to under perform. 

  • Quote
    • 11 months later...
    On 1/15/2022 at 9:47 AM, Ajjones325 said:

    Just found the p053f fault code and checked battery voltage and its sat around 11.9v this morning,  I reckon the battery's on its way out causing the LP fuel pump to under perform. 

    What happened/did you get a new battery?

     

  • Quote
    • Sad 2

    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
      • 247 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.