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Running on 3 cylinders

  • 17-02-2014 2:47pm
    #1
    guil
    Registered Users, Registered Users 2 Posts: 10,561 ✭✭✭✭


    The gf focus was running ok upto a few weeks ago. All of a sudden then only on 3 cylinders. It's been parked up since with nothing done to it but there is no EML. Would a diagnostic scan show anything with no light on? I know the coil pack is a common problem on them but I can't remember the last time one went if the light came in or not. It's 1.4 99.


Comments

  • #2
    guil
    Registered Users, Registered Users 2 Posts: 10,561 ✭✭✭✭guil


    Forgot to mention there was a new Bosch battery put in about a week before but I don't think that would make a difference.


  • #3
    Avns1s
    Registered Users, Registered Users 2 Posts: 3,424 ✭✭✭Avns1s


    Get the coil packs checked. As you mentioned its common and the most likely cause.


  • #4
    thomas anderson.
    Registered Users, Registered Users 2 Posts: 1,121 ✭✭✭thomas anderson.


    Coil pack


  • #5
    guil
    Registered Users, Registered Users 2 Posts: 10,561 ✭✭✭✭guil


    Avns1s wrote: »
    Get the coil packs checked. As you mentioned its common and the most likely cause.

    How or where would I get them checked?


  • #6
    toyotaavensis
    Registered Users, Registered Users 2 Posts: 1,331 ✭✭✭toyotaavensis


    easiest thing is swap the coils around and see if it causes another cylinder to not fire.


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  • #7
    CJhaughey
    Registered Users, Registered Users 2 Posts: 14,909 ✭✭✭✭CJhaughey


    These have a single coil pack IIRC, 4 bolts and check with a known good unit. They aren't that expensive from Ford~80 IIRC, but Valeo or Bosch are around 60euro


  • #8
    biko
    Registered Users, Registered Users 2 Posts: 81,220 ✭✭✭✭biko


    A mech should be able to check them in a few mins.


  • #9
    burke027
    Registered Users, Registered Users 2 Posts: 501 ✭✭✭burke027


    biko wrote: »
    A mech should be able to check them in a few mins.

    As above they have a single coil. Common practice is to change the coil and leads.

    Depending on the year then the frost plugs in the head need to be checked. If there's water in around the leads then that's causing ur misfire


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