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Rough idle..

mizz239
mizz239
in General Ford Related Discussions

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So I have replaced the spark plugs, air filter, (oil change and filter next, and replaced the boost pressure control valve...idling is not as smooth as 1st having the car, about 3 months ago....and other things I can check?, I am due to replace the recirc valve next.. and any advise would be appreciated...tbh, and when I 1st start the car, it revs highly ( I'll try and make a note of what the rev counter rading gives and then update) then returns to normal revs..

Oh and it's a focus st225 2006.

Edited by mizz239
New text added

  • Quote


    59 minutes ago, mizz239 said:

    and other things I can check?,

    Have you checked the DTC's using FORScan ?

    There may be Ford specific codes stored that would give you some help.

  • Quote
    • Author

    P0557 brake servo pressure sensor which when searching for code description or part for mine it comes up with the boost pressure control valve...I have replaced it, maybe a faulty one or check pipes to and from it maybe?

  • Quote

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