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Thread: ford focus misfire

  1. #1
    Join Date
    Mar 2012
    Posts
    1

    Cool ford focus misfire

    Hi I have a ford focus which has a misfire. It also cuts out whenever I am slowing down or idle. I also know there is a battery problem becuase if I have the radio on for more than 5 mins the battery goes flat. Could the two problems be connected.
    I have checked the spark plugs all seems ok and the coil pack was replaced 1 year ago.
    Any help please.

    Thanks
    Hope you enjoyed the sun while it lasted!!

  2. #2
    Join Date
    Sep 2007
    Location
    Scotland
    Posts
    8,794

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    Welcome to the site q1w2e3r4t5y6u7i, I'm no expert on the matter, but I don't think the battery problem could cause the misfire problem?

    You said all the spark plugs were OK, which means there is fuel and power getting to all the cylinders, so that should narrow the problem down a bit. One of the site Guru's should be able to diagnose the problem for you, good luck

  3. #3
    Join Date
    Aug 2010
    Posts
    817

    Default

    Sounds like a coil pack again if the car is misfiring at idle it will cutout did you change the leads when it was changed last time as to the battery going flat that seems like your battery has died check the alternator is charging and get your battery tested

    The two faults are separate

    Miss breakdown

  4. #4
    Join Date
    Oct 2006
    Location
    Mcr
    Posts
    106

    Default

    Quote Originally Posted by q1w2e3r4t5y6u7i View Post
    Hi I have a ford focus which has a misfire. It also cuts out whenever I am slowing down or idle. I also know there is a battery problem becuase if I have the radio on for more than 5 mins the battery goes flat. Could the two problems be connected.
    I have checked the spark plugs all seems ok and the coil pack was replaced 1 year ago.
    Any help please.

    Thanks
    Hope you enjoyed the sun while it lasted!!
    Coil pack may have failed again . Get a new battery anyway !
    check this ..

    Disconnect coil pack multiplug
    Switch ignition on ( without engine running ) and stick a noid light in the plug from middle pin to either pin 1 or 3 , if you get a light then the ECU maybe faulty as the switching part of the ecu has failed

    But dont forget the obvious ... Leads ( they can get badly oiled up due to failed cam cover gasket )... plugs .. damp

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