Mondeo air leak.

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  • Mondeo air leak.
  • Premier Icon zippykona
    Subscriber

    When we pull up at the lights our mondeo revs on for a bit then settles down to a normal idle.
    Looked at the net and changed idle control valve. Next step is to look for a split hose.
    Question is am I looking for a suck or a blow?

    higgo
    Member

    They call it a ‘blow’ but it’s almost always a suck.

    An air leak on a petrol at idle will suck .

    Try spraying some carb or brake cleaner on vacum/breather hoses with the engine idling . Listen for a change in engine note and note where you’re spraying , this is where the air leak will be if there is one .

    brodie
    Member

    Faulty gearbox speed sensor could also cause that, common on Fords.

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