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Thread: Guy's, I really need some help!

  1. #1
    Full Member Vaux-Man-G's Avatar
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    Default Guy's, I really need some help!

    Ok, not me mentally, but with this car problem!

    Back to the drawing board with my dad's CDTI 150 SRI.

    It started with a horrible flat spot and a real reluctance to do anything under 2k rpm. But in the background was another issue, whereby it trembles when idling when cold.

    So as instructed on here, I cleared out the EGR Valve and I am now on my 3rd EGR Valve which was a brand new one. I have cleaned the Boost Sensor but cant get some of the muck off so did the best I could.

    Done the airbox mod and stuck a K&N panel in there.

    Done the 3rd Injector wiring mod which was being pointed at due to the tremble.

    Today, I got the dreaded spanner light again and this is reading P0400-5A (EGR Valve) but the EGR Valve is brand new and all three valves cant be !!

    .....and now when it is idling at cold it actually feel like its going to drop the revs and turn off.

    I sat in it for 3 mins or so today and monitored it and the actual rev needle dropped a little and I thought it wouldve cut out but it didnt but it trembles a lot more now than it did before!!

    WHAT NEXT FOLKS.............


    Bye bye Vec B
    - Hello Siggy!

  2. #2
    Regular Member mark_647's Avatar
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    Default

    Ive read many of your threads, bet you are well stressed !! Just sorry I cant help !

  3. #3
    Regular Member m8internet's Avatar
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    Default

    How about visiting a local diesel specialist and seeing what they think

    I am just about to do that with my 3.0 V6 CDTI, on the instruction of VX Retailer Warranties!
    It's one thing that VX dealerships are really week on, is diesel engine experience
    Yes, if it throws up a fault code, lets replace that part, but if the fault code remains or there isn't even a fault code, then they are hopeless

    My local VX dealership has "a part" to apparently fix mine, but that doesn't match the discussion we had with the area engineer on his previous visit
    I get the distinct feeling they are going with their original diagnosis, the quicker one to fix!
    When the area engineer advised them it was the SCV the mechanic used some choice words including, "how the f&$* do we get that out of there, that's going to take hours"
    I had already made arrangements for a courtesy car and two days without my car, now I've been advised it can be fixed in two hours...
    I smell a smell

    When I was in getting my tyres the mechanic listened to my engine and went on a test drive
    He noticed the revs on idle were varying very slightly on idle, and it's being doing that ever since the cambelt change
    He was shocked at the sudden lack of power at between 2000 and 3000 rpm, "It's like the brakes are being applied", and then suddenly at 3000 rpm the power comes back, "how weird"
    He too was scratching his head at how the EMS warning wasn't coming on and/or the engine wasn't going into safe mode
    How about the MAF - so he disconnected that - no, that's fine
    How about the EGR - had a play there, no that's fine
    How about the injectors - had a play there, no they're all fine too
    "Get it to a diesel specialist, there is clearly something basic and simple we're overlooking"
    Last edited by m8internet; 27th September 2009 at 23:38.

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    Full Member Vaux-Man-G's Avatar
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    Hmm, Diesel specialist? If it is electrical would they know? I usually find that they point towards the obvious which is what I have already been through and they end up charging through the nose!

    To say this is doing my nut in is a understatement!

    Could it be the actual injectors that are scrooged?


    Bye bye Vec B
    - Hello Siggy!

  5. #5
    Full Member Vaux-Man-G's Avatar
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    Default

    Anyone anything else to add?


    Bye bye Vec B
    - Hello Siggy!

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    Regular Member Dan_BlackSRi's Avatar
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    Quote Originally Posted by Vaux-Man-G View Post
    Anyone anything else to add?
    I think I need a poo

  7. #7
    Regular Member Readster's Avatar
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    All I can suggest is a tech2 hookup at your VX dealer mate.
    Ask them to 'solve' the issue(s).
    The chances are that it is a relatively minor fault and While £80 is a lot of money for an analysis it may well work out cheaper for you in the long run.

    With these complex modern motors with sensors R'us its hard to find the fault on your own and you have tried harder than a lot of people would.

    Hope this helps
    Cheers
    John

  8. #8
    Regular Member robk6112's Avatar
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    Default

    My 150 doesnt idle right when cold either. Its going in for service next month so just hoping they sort it then. I also have changed my egr and fitted a k an n and didnt help???

  9. #9
    Regular Member Sean-2.2Direct's Avatar
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    Quote Originally Posted by Dan_BlackSRi View Post
    I think I need a poo
    Your just nasty mate

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    Regular Member AntSSSS's Avatar
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    Default

    I had very simular problems with lumpy idle and very flat spot etc - and that was after a new Inlet with EGR..

    Result was it needed 4 x injectors. these were replaced and it was like a different car!..

    Vx guy told me this was a known and common fault (CDTI 150BHP on an 05 Plate)

    A

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