Question about Ford Focus

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The car is a new Focus ST3 It pulls back and hesitates and makes a sucking sound when it does so. You notice it more when driven slowly: at 30mph in 3rd gear, at 40mph in 4th gear etc. The Dealer just takes this as a performance issue, drives it hard and reports no problems. It passes all its electronic tests - But I don't think it's an ignition problem, it's more of an induction problem of taking in air where it shouldn't

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  • Dean Gildea Aug 28, 2008

    It's a brand new car so everything should be clean

  • Dean Gildea Aug 28, 2008

    Interesting response, but still not convinced it is an electrical issue

  • Dean Gildea Aug 28, 2008

    This sounds more like it
    But what does major mean and what is at fault

  • Dean Gildea Aug 28, 2008

    You can sometimes hear the slight sucking noise at idle

  • Dean Gildea Aug 28, 2008

    The engine is a 2.5 litre lump crammed under the bonnet, any suggestions where to start looking ?

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8 Answers

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Hi,

Along the post of Pyrhyc, and if I may add....

Try spraying water (pls use small indoor plant sprayer) in the suspected areas of leak with the engine running. Not too much though but enough to coat the air filter/cleaner housing specially the seams/joints. Apply liberally to the bottom portion where the clamps are. You can do the same to the junction of the intake manifold and cylinder head. If the engine dies or even just falters, then there is a leak.


Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Posted on Aug 29, 2008

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You may need to double check the Constant Velocity joints

Helpful link:

http://www.samarins.com/glossary/cv_joint.html

And here:

http://www.samarins.com/check/transmission.html#info

Posted on Aug 28, 2008

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Check if any air inlet hose leaks or loose hose connection.

Posted on Aug 28, 2008

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When the motor is at idle.. can you hear any vacuum leaks... it sounds like a sucking sound
one thing i am thinking is that there is a vacuum solenoid on the transmission which may have come off.

Robert

Posted on Aug 28, 2008

  • Roberta Smith
    Roberta Smith Aug 28, 2008

    doing some more reading that transmission is probably a powershift .... it will have a slight hesitation if it tries to shift up or down more then one gear.



    Robert

  • Roberta Smith
    Roberta Smith Aug 29, 2008

    a vucuum leak is a good suspect to look for. have a mechanic put the car on a lift while it is running .... and listen and look for anything that is not hooked up to something. fords are horrible beasts for vacuum leaks. be that as it may it is mainly electronic shifting but vacuum can play a key role as well.



    Robert

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Check the duct that goes from the air filter to the intake system. If you can hear it sucking air, then it's major, and the only major area that would allow the kind of air flow that you could possibly hear at thirty or forty mph will be around the air filter or the ducts.

Posted on Aug 28, 2008

  • Ryan Rogers
    Ryan Rogers Aug 28, 2008

    Even though it' a brand new car, the duct leading from the air filter could be shifted slightly and out of place on one side.

  • Ryan Rogers
    Ryan Rogers Sep 02, 2008

    Start looking around the air filter and duct work, then work your way to the intake of the engine.

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Not the ignition problem.but check.

Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...

pls do rate the solution

thanks.
regards.
fixya expert team

Posted on Aug 28, 2008

  • tech expert12 Aug 28, 2008

    check if any blockage on engine ventilations.

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I would have the fuel filter changed this should eleviate the problem. also make sure your air filter is clean if the engine can't breath it will struggle under power

Posted on Aug 28, 2008

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A focus

Posted on Aug 27, 2008

  • John Smith
    John Smith Aug 27, 2008

    have they tested the hydrolic system

  • John Smith
    John Smith Aug 27, 2008

    sometimes its due to bad oil filters, or the quality of the gas u buy.

    try changing gas type and see wat happens


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