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Fault please help P0304 / P0304 P

legsakimbo
legsakimbo
in Ford Fiesta Club

Featured Replies

Fault please help P0304 / P0304 P

My daughters ford fiesta 1.2 (2014) has had this engine light fault light

I have done research on the fault and most people recommend  changing

Spark plugs , changing spark plug leads , and changing coil pack which I

Have done , but after resetting fault light after about 10 to 15 miles the light comes

Back on , I have checked as   I can the fuel injectors  by listening to injectors by using

Long screw driver and all injectors are clicking pretty good ,,, so I am now lost for next

Plan , any help would be much appreciated …..

  • Quote


    You could swap over two of the injectors to see if the fault moves to another cylinder.

  • Quote
    • Like 1
    • Author

    yes i think i will have to do that , its strange because it seems to run great no misfire, no loss of power ! 

    cheers for help 

  • Quote

    from what i have read, that fault code is a misfire on cylinder 4, you can try swapping the injector to see if that helps, also that all the spark plug boot is properly seated on both the plug and the coil

  • Quote
    • Thanks 1
    • Author

    No I have not checked intake pipe but I will . If I can find it lol cheers 

  • Quote
    • Author

    Yes I will have to swap the injectors over , only problem my daughter works in London , and comes home at weekend, so that’s the only time I can work on it ! 

  • Quote
    • Like 1

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