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EGR valve gunged up

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  • 17-06-2013 7:41pm
    #1
    machineman
    Registered Users Posts: 21 ✭


    am having an on going problem with the egr valve in a ssyangyong kyron diesel . Its just all bunged up with an oily , tarry , sooty type stuff .
    Am having to remove it and manually clean it out every 3 to 4 weeks .I`ll have it spotless and within a few weeks i`ll be on the motorway giving it bit of acceleration ant the engine light will come on and will have loss of power .
    am bloody fed up with it . I use good fuel , but I did pour a lot of crap into an injector to try to loosen it , but that was 10,000, miles ago and thought it would have cleared by now.
    Is there something funny being put into diesel ,or is there a simpler answer ?
    Any advice appreciated . Tried dipatane .


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    #2
    NuckingFacker
    Closed Accounts Posts: 5,221 ✭✭✭NuckingFacker


    Blank off the egr port. Simples.


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    #3
    hiluxman
    Registered Users Posts: 207 ✭✭hiluxman


    its possible the valve itself is faulty, is it a vacuum operated valve or an electrically operated valve? if the valve is electrically operated, the motor that opens and shuts it could be weak, it mightened be closing completely causing your sooting problem,
    On the other hand a bad injector could be delivering excess fuel, this in turn would cause excessive soot in the exhaust,

    Sometimes when you blank the valve on newer diesels it causes the engine management light to come on, the amount of air flow into the engine is measured by the air flow meter, this reading changes when the egr gases flow onto the inlet manifold, if the egr valve is blanked, no egr gas flows and it brings the eml on and a fault code for egr low flow.

    Whats the fault code when it light comes on?
    Is there much black smoke from the exhaust when theres no fault?


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    #4
    CJhaughey
    Registered Users Posts: 14,906 ✭✭✭✭CJhaughey


    Make a blanking plate but leave a 6mm hole in the middle.
    This allows enough exhaust gas to enter the manifold that it fools the engine into thinking that there is exhaust running through it but not enough to block the port.


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    #5
    NuckingFacker
    Closed Accounts Posts: 5,221 ✭✭✭NuckingFacker


    Make another blanking plate for the EMS light after you make the blanking plate for the egr.:D


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    #6
    9935452
    Registered Users Posts: 2,751 ✭✭✭9935452


    CJhaughey wrote: »
    Make a blanking plate but leave a 6mm hole in the middle.
    This allows enough exhaust gas to enter the manifold that it fools the engine into thinking that there is exhaust running through it but not enough to block the port.


    +1


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    #7
    hiluxman
    Registered Users Posts: 207 ✭✭hiluxman


    CJhaughey wrote: »
    Make a blanking plate but leave a 6mm hole in the middle.
    This allows enough exhaust gas to enter the manifold that it fools the engine into thinking that there is exhaust running through it but not enough to block the port.

    some vehicles are more sensitive than other when it comes to measuring egr flow, I had a transit that had a fault code for low egr flow and it turned out to be the metal pipe from the egr valve that supplies the egr gas to the inlet manifold was partially blocked with carbon/soot, the metal pipe is aprox 25mm in diameter and was restricted to about 10mm, this still wasn't enough egr flow to stop the engine management light from coming on,
    In saying that, a transit will put the engine light on for almost anything


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