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Thread: HELP! More Rough Idle, Juddering and Rev problems

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  1. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #21
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    I had a quick read back through and two things jumped out at me I had not noticed, the car was built with a DPF, is it still thre or has it been removed as I have had a large number of poor idling PD DPF cars where the DPF has been removed and the ECU remapped to suit. The other is obviously it has suffered the usual BRE oil pump failure which has damaged the engine and so who rebuilt it and the turbo, which always suffers? It could be as simple as a miscalculation of the head gasket thickness, see which one is fitted and if it is 3 hole that could indicate it had a 1 or 2 hole originally and someone just lazily slapped on a 3 hole as they could not be bothered to measure the piston protrusion, just a theory.....
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:
     
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  2. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #22
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    Just PMd you contact details for Indy VAG garage in Exeter. In case you're in need of it.

    Hope that helps


    Sent from my iPhone using Tapatalk
     
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  3. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #23
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    Hi @Crasher. It was sold to me without a DPF and they put a new one on it, as I asked if the current setup would pass an MOT. Rather than answer the question, they just put a new DPF on it! I've had three DPF regens in 4 weeks!!
    A remanufactured engine was fitted, the turbo was looked at and I was told it was fine.
    What you've said about the head gasket has gone over my head a bit, sorry.

    In another interesting turn of events, ive just found out this morning that the company who I purchased the car from, and who it is still under warranty with, have closed down and gone into liquidation. So looks like I'm on my own with it now!!
     
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  4. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #24
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    If they fitted a pattern DPF, that could be causing a problem, I have given up on aftermarket DPF's, they are nothing but trouble. Was it mapped back to standard after the DPF was re-fitted? It would be worth getting it re-flashed by Audi or someone else with ODIS or who has the standard file. The head gasket comes in three different thicknesses, 1.55 1 hole, 1.63 2 hole and 1.71 3 hole. If the car was built with a 1 hole and to save effort they slapped on a 3 hole hole, the would adversely affect the compression pressures.

    [IMG]file://C:\ElsaWin\graphics\wi\A15-0802.png by Steve Cresswell, on Flickr[/IMG]
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:
     
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  5. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #25
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    Hi @Crasher - thanks for that. I'm not sure what DPF was fitted, but I'm assuming it's aftermarket. I believe it was mapped back to standard after the new DPF, but I'm looking at getting a full custom re-map done next month to look into that.

    Interesting that you mention compression pressures...

    I've had it looked at by a local independent VW/Audi place. ((Thanks to the other guys who've recommended some other garages - but they're a bit too far out for me to use at the moment)).
    I described the problems I've been having, and gave him all the paperwork for what it's had done recently, results from his checks;

    Tested for air in diesel. All OK.
    Checked Cam Timing. Cam Timing was out. Now set correctly.
    Injector adjustment was incorrect on all injectors. Now set correctly.
    Checked Cam Shafts - all looks good.
    Carried out compression test.... Low compression on all four cylinders.

    I've been advised that it should be approx. 400psi on each cylinder, and he was expecting it to read slightly low due to an extension/adapter he had to put on his compression tester in order to "reach". But the results were;
    Cyl 1 - 350psi
    Cyl 2 - 300psi
    Cyl 3 - 350psi
    Cyl 4 - 320psi

    His guess is that the engine has not been correctly run in. Given the low mileage on the new engine, he's suggested draining the current oil out and filling up on "running in oil" and doing another 500-1000 miles on the specialist running in oil.
    Unfortunately I cannot confirm if my old garage used "running in oil" or not, one of the other mechanics suggested that he probably just used whatever oil is supposed to go in the car.

    Does that make sense?

    I'll suggest this head gasket to him, see what he thinks.
     
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  6. Re: HELP! More Rough Idle, Juddering and Rev problems 
    #26
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    Suggest to your chap Millers Glaze Bust oil, it has sorted out a few cars for us that have been run on synthetic too early or been poorly run in . Use the Glaze Bust for 200 miles and then 500 on some running in oil. Then use a simple 15w/40 mineral oil but this is hard to find, all I have been able to obtain is Motul - Oils and lubricants Products, I tired a Fuchs oil that was supposed to be mineral but the (new build) engine started burning oil after the running in oil so we did Glaze Bust and the Motul and so far he has not said anything.......
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

    W.H. Auden (1907-1973), A Curse:
     
    0 0 0
     

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