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    Ford Fiesta 1.25 Zetec X registration Archived Message

    Posted by Steve ( aka John Kennard ) on November 17, 2008, 2:34 pm

    Typical, john is away on holiday and we get a problematic fiesta ! Symptoms are engine hunting after the throttle has been touched, car came in for mot and failed the emissions due to poor idle and unable to hold the revs at 3000, if you turn the vehicle off and re-start it idles fine, the minute you blip the throttle it will hunt between 1500 and 2000 revs until you switch off again. Have checked fault codes, none in system, removed throttle body and cleaned, no change, dissconnected battery for 20 mins, no change.
    No obvious air leaks ( but i would not expect it to run fine on startup if there was ) This has the later engine with the air filter housing on top the inlet manifold so no afm or idle control valve, any help appreciated, Steve

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