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Speedo Flicks / Engine Jumps

aSystemOverload
aSystemOverload
in General Ford Related Discussions

Featured Replies

My Focus has developed an intermittent fault.  When the engine has warmed up (takes longer when it's <8 degrees outside) and the car is moving (but not accelerating or slowing down), the speedo flicks to max (or at least 20mph more than actual) and the engine starts to jump like the car is going too slow for the gear.

Any ideas on a root cause?

  • Quote


    Is it a desiel or petrol cheers chris

     

  • Quote

    Sounds like the VSS (Vehicle Speed Sensor) on the gearbox.

    A common fault but can be a pain to fix as the pin that holds the sensor in can seize and it needs to be drilled out.

  • Quote
    • 2 weeks later...

    could also be the instrument cluster. Sadly a well known issue.

  • Quote
    • 2 weeks later...

    SystemOverload, Just wondering if this issues was resolved or anyone can add anything else.  My 09 Ford Focus Diesel appears to have developed a similar problem.  When doing a decent speed (50-60mph) I've felt the car jump - this can happen several times and then nothing for a few days.  Haven't noticed if the speedo drops speed but will look out for this the next time.

    Can anyone explain the known issue with the instrument cluster?

     

  • Quote

    It's basically the connections at the back (solder joints) start to loosen and break the connections and it becomes an intermittent connection.

    The cluster is key to the cars operation and the slip in connectivity can cause it to jump and skip a beat

    Sent from my GT-I9195 using Tapatalk

  • Quote
    • Like 1
    • Author

    Hi, Sorry, thought I'd subscribed to updates, but obviously not.  It is a Petrol Engine.

  • Quote
    • 3 weeks later...

    I really think this is a faulty instrument cluster

  • Quote
    On 21/03/2016 at 10:14 PM, aSystemOverload said:

    My Focus has developed an intermittent fault.  When the engine has warmed up (takes longer when it's <8 degrees outside) and the car is moving (but not accelerating or slowing down), the speedo flicks to max (or at least 20mph more than actual) and the engine starts to jump like the car is going too slow for the gear.

    Any ideas on a root cause?

    having exactly the same problem with my focus but at least i know what it may be.thanks for the info guys

  • Quote

    The problem starting up when warm is probably a faulty crankshaft sensor or wiring

    Sent from my D6603 using Tapatalk

  • Quote

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      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
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