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Any HDI experts on here

  • 12-05-2010 6:18pm
    #1
    balcan
    Registered Users, Registered Users 2 Posts: 107 ✭✭


    I've a Dispatch HDI that of late has become difficult to start intermittently hot or cold.Can hear LP pump priming on ignition and no noise after from pump.Had a look around the engine and looks like one of the injectors is leeking a small bit.Would this cause the difficult starting?Once the engine is running it's driving fine.No warning light has come on.If it's the injector causing the problem would it cost much to put right.Any help would be much appreciated.


Comments

  • #2
    shamwari
    Closed Accounts Posts: 2,142 ✭✭✭shamwari


    Certainly an injector leaking is not good on any diesel engine, especially a common rail engine! This might affect starting if it causes the pressure in the common rail to be below the minimum needed to start.

    However in this instance, it could be a fuel filter or LP fuel pump issue. Personally, I'd get someone to look at live data and stored fault codes to see if there are issues with the rail pressure and take it from there.

    Also, I seriously doubt if a glow plug issue would be to blame as DI engines only use them briefly in extreme cold.

    No issues with compression in this engine?


  • #3
    balcan
    Registered Users, Registered Users 2 Posts: 107 ✭✭balcan


    Thanx for the reply,No compression test done,But she's driving fine with no signs of any smoke just the intermittant starting.She'll always starts but sometimes starts and die's a few times.I've been told the LP pumps do give hassle.I'm just worried about the injection system as i believe any work will be costly.Bring back the days of the good old Td engines without all this common rail stuff to go wrong


  • #4
    shamwari
    Closed Accounts Posts: 2,142 ✭✭✭shamwari


    balcan wrote: »
    Thanx for the reply,No compression test done,But she's driving fine with no signs of any smoke just the intermittant starting.She'll always starts but sometimes starts and die's a few times.I've been told the LP pumps do give hassle.I'm just worried about the injection system as i believe any work will be costly.Bring back the days of the good old Td engines without all this common rail stuff to go wrong

    Indeed the older stuff has a lot less to go wrong with it! Somehow I also think that the LP pump is the cause.....but don't hold me to that!!! ;)


  • #5
    Row
    Registered Users, Registered Users 2 Posts: 2,025 ✭✭✭Row


    Lp intank pumps are a common a failure on the early hdi's,
    As shamwari said you will need livedata looked at when its trying to start and the hp pump should be putting our around 290 bar at idle.
    What year is your dispatch..??


  • #6
    gigabit
    Closed Accounts Posts: 72 ✭✭gigabit


    balcan wrote: »
    Thanx for the reply,No compression test done,But she's driving fine with no signs of any smoke just the intermittant starting.She'll always starts but sometimes starts and die's a few times.I've been told the LP pumps do give hassle.I'm just worried about the injection system as i believe any work will be costly.Bring back the days of the good old Td engines without all this common rail stuff to go wrong

    Is it making loud ticking sounds?


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  • #7
    johnayo
    Registered Users, Registered Users 2 Posts: 1,718 ✭✭✭johnayo


    As was said earlier, it is important to get live data looked at. There are too many possibilities, so dont just start replacing on a hunch. could get very expensive. Important to get an "injector leak off" test done as this will let you know if you have a faulty injector. Just one of the things that gives this problem.


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