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Thread: 1.6 CAYC rough idle

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  1. 1.6 CAYC rough idle 
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    Hello!
    I'm new to this forum and apologise if I missed similar topic in search.
    I've got Golf Mk6 1.6 TDI for at least 2.5 years or so...with the problem - wobbly idling. It started about a year ago, I did not notice the problem before. The engine always starts normally but while it's warming up (esp. when the t is below +3C) and revs decrease from ~1100 to standard 780-800 it snorts and wobbles a bit.
    Actually I guess it's all about faulty injectors... There are 03L130277B ones, never been replaced. The mileage is 157k on dashboard, but the actual number is unknown cuz it's been cut down :-\ I took the injectors out and checked them on Rabotti Unitec bench which showed that they are really been worn out. VCDS also showed that injectors work pretty rough. I can attach screenshots later if needed. Btw, fuel consumption is increased a bit in a city cycle.
    Occasionally the engine works absolutely normally, but when it's idling and I slightly put accelerator pedal to ~900 revs and immediately release it the engine begins to wobble and sound like a tractor again. And also when it's alright I push the clutch pedal and slowly release it (on neutral gear) the same thing happens. Tr-tr-tr-tr...and so on. It's enough to push on the throttle to make the engine work normally. But it can shake on idle constantly until I restart the engine. ***Here's a video*** for an example (with a Polo, but it doesn't matter if the engine is the same).

    But sometimes the engine runs smoothly as if nothing had happened. It seems that he lives his own life :-| So what's the actual problem?
    p.s. Seems there's no EGR and no DPF.

    Sorry for my bad English, haven't written in it for quite a long time.
    Regards, Nick
     
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  2. Re: 1.6 CAYC rough idle 
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    Ok, been to dealership:
    DSC_0375.jpg
    Seems to be good? The engine's been working absolutely properly at that moment. But the 2nd injector values sometimes fluctuate 0.6...9(!) mg/stroke!!! Thanks to the serviceman who've noticed that, I couldn't almost see this without him.
    So after diagnostics he told me all 4 injectors should be changed...Can't believe that's the decision to my problem.

    The next day I've noticed this:



    So what the actual problem I'm worrying about? Now I guess it's not the injectors :-/
    Last edited by lightbreeze; 19-12-2018 at 01:00 PM.
     
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  3. Re: 1.6 CAYC rough idle 
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    And when I start the engine and it's been reducing revs from 1100 to 800 while warming up it shakes bit as well but then it works fine till it's got normal operating temperature. Maybe the problem is in the sensors?
     
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  4. Re: 1.6 CAYC rough idle 
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    Has it had the stupid emissions update?
    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: 1.6 CAYC rough idle 
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    I guess no cuz the issue began for no reason. Never had any updates so far since I'm the owner
     
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  6. Re: 1.6 CAYC rough idle 
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    Is it still the original dual mass flywheel?
     
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  7. Re: 1.6 CAYC rough idle 
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    No mate, it's been replaced to single mass Valeo (model no. 835035) but I should say the actual problem has already been before.
    And the clutch and flywheel replacement wasn't in vain actually, the old one Sachs has been pretty battered
    But I still don't know was this decision correct or not - there was no time to wait Sachs for delivery...so anyway the clutch's been working good
    ---
    Throttle valve is cleaned, engine mounts have been replaced, timing belt and V-belt replaced, etc
    There's lots of videos on YT on this issue and in most cases, judging by comments, the problem is in the injectors. But after scrolling down some forums I've noticed that the problem is software related rather than mechanics
     
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  8. Re: 1.6 CAYC rough idle 
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    The CAYC engine was initially built with a solid flywheel but later one was added and a TPI notice issued about converting cars with single mass to dual mass but the injectors are also a major issue and stupidly expensive, they cost twice as much and take longer to replace than an Audi RS6 V10 which is ridiculous.
    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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  9. Re: 1.6 CAYC rough idle 
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    Ok, maybe it's really the time to replace them. Pity the price is incredible. But I still guess the essence of the problem is different, not the injectors
     
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  10. Re: 1.6 CAYC rough idle 
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    Hello mate in case of replacing injectors, which is aperently quiet common on 1.6tdi i have got a coding process video that might be helpful. As they need coding to run properly.

    Vw Golf 1.6 TDI 2011 injector replacement and coding. How to do it? - YouTube

    Sorry Ill introduce myself as well while im here
    MY name is Alex and I’m a Vehicle Pro Technician from Kent.

    I currently got Audi Q3 2.0 TDI Sline, Skoda Fabia VSR 1.9TDI and Toyota Supra MK4.
    Had over 12 VAG group cars in last 4 Years! Most of them TDI.
    In 2018 I’ve created a Youtube Channel that got over 170 videos. That include loads and mainly VAG car Problem solutions. Pretty much everything we got on the road.
    Aim of my channel is to help everyone with any car issues including buying them as well. Have a quick look at my channel and Subscribe if you think it that it might be helpful to you one day!
    Share if you can, as this service is free and my aim is to dedicate myself 100% in to this. Success for me will be opening my little workshop where I can give honest help and advice and also support this channel to provide as many videos and help as I can!
    I will really appreciate any support like subscribe, like or share of my channel!

    I can provide help in 5 Different languages.
    MY Youtube Channel is AlexTheGrumpyOne
    Facebook profile is also AlexTheGrumpyOne!

    www.youtube.com/c/alexthegrumpyone
     
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