Hello I hope this message reaches you all in good health. Firstly like to thank you for having me and for your answers in advance.

 

I have a 2010 1.6 tdi estate octavia with 188k on the clock really nice to drive, fsh, one previous lady owner. 

 

So the problem I am having with the car is that the turbo is not working and neither is the cruise control....however whilst driving if I quickly turn the car off the on the turbo kicks in until I stop at a junction or traffic lights. 

 

This first happened when I got off motorway and the car lost power I simply turned the car off and turned it back on 5 seconds later and it was fine again. It then happened a few weeks later again I done the same and now few weeks later (2nights ago) its just not happening at all.

 

I have taken it to the mechanics who has kindly put the car on the ramp and inspected the pipes and said they are all fine and then connected the car to his computer to which there were no fault codes at all and no dash warning lights.

 

Somebody please help me as I need my car for work and it is extremely difficult to drive without turbo. The car is very slow to pick up speed in.

 

Thanks.

Sounds to me that you are suffering from sticking vanes in the variable vane turbo. When this happens, usually when accelerating under load, the resulting overboost puts the car into what feels like a semi limp mode. Turning the ignition off and on resets the protection. Usually no faults show up on a diagnostics reader and no dash warning light.

 

A garage can check by moving the actuator. It should move freely with no sticking. This will confirm or not my diagnosis.

 

The turbo can be taken off and cleaned mechanicaly or if time is short, a temporary fix by using a turbo cleaner additive (although personally I wouldn't on a car with DPF). With your current mileage I would put in a reconditioned turbo.

Ah ok, so to resolve the problem will the actuator just need replacing? Or will it have to be the actuator and the turbo?

It's not the actuator that is at fault, it is the build up of burnt carbon around the moving parts of the vane system inside the turbo. The actuator arm rotates a full size disk inside which in turn connects to many vanes. When the vanes can't move back to normal position at high flow rates, it causes overboost and shutdown.

 

Here is one example of how it works:-

https://paultan.org/2006/08/16/how-does-variable-turbine-geometry-work/

 

You need to replace the turbo and actuator together and they normally come as an assembly since they are calibrated as a unit.

Edited 1 May, 20188 yr by pikpilot

I use Forte Turbo cleaner once a year. Its supposed to clean the turbo, and prevent sticky vanes. Forte seems to be recommended by many people. I usually do this with a long trip, so I can run the engine with high RPM once the engine is heated. 

 

I've done this now for 3 years, and my turbo is still working properly. Don't know if this is due to luck or the cleaner.. But so far I still have the original turbo, while my engine is at 385000km (239k miles). 

 

If I remember correctly, you can double the dose to do a 'more aggresive' cleaning.

 

Also, some people seem to have good experiences with Dr Muscle to clean their turbo. (google for it). 

 

My car doesn't have a DPF, but if yours has, it might be good to check if there are limitations. In all cases: Giving cleaners a try is always cheaper than a replacement turbo. And if the turbo is f*cked anyway... you have not much to lose.

 

Edited 1 May, 20188 yr by DJSmiley

I used the same product on my previous 1.9 car and I can highly recommend it. I just think that putting it into a high pressure CR engine with a DPF may be a step too far without getting confirmation from someone that it is OK.

Just received a new bottle of Forte. (along with a bottle Advanced Formula Diesel Treatment, since you've to use them together)

 

On the back: "One bottle threats up to 50 litres of diesel fuel. When a fault has occurred add two 400ml bottles to the fuel tank"

 

It also says compatible with all diesel engines. Doesn't mention anything about restrictions for CR engines.

 

On another forum, there was a more specific reply about the use with DPF. Basically: There are no restrictions to use it with a DPF. However, since the cleaner just helps to remove carbon, it might end up in your DPF.

Without a DPF, it just goes straight out. But for a periodic treatment, it won't fill up your DPF instantly.... 

 

https://www.forte-nwe.pl/forte-wprowadza-nowy-produkt-forte-diesel-turbo-cleaner/productleaflet-forte-diesel-turbo-cleaner

 

On 5/1/2018 at 10:00, DJSmiley said:

I use Forte Turbo cleaner once a year. Its supposed to clean the turbo, and prevent sticky vanes. Forte seems to be recommended by many people. I usually do this with a long trip, so I can run the engine with high RPM once the engine is heated. 

 

I've done this now for 3 years, and my turbo is still working properly. Don't know if this is due to luck or the cleaner.. But so far I still have the original turbo, while my engine is at 385000km (239k miles). 

 

If I remember correctly, you can double the dose to do a 'more aggresive' cleaning.

 

Also, some people seem to have good experiences with Dr Muscle to clean their turbo. (google for it). 

 

My car doesn't have a DPF, but if yours has, it might be good to check if there are limitations. In all cases: Giving cleaners a try is always cheaper than a replacement turbo. And if the turbo is f*cked anyway... you have not much to lose.

 

I am going to double dose mine as sticky vanes have come back!! Will I be wasting my money if I put 3 lots of it in?

Ok so an update on the issue so far. I sprayed carbonate spray in to the turbo via air pipe whilst started and took it for a drive worked fine then went in to limp mode few mins later. Then second day sprayed another can but took the whole pipe off and directly sprayed and car worked fine i was so happy car drove really nicely went home parked it up for 20 mins then went back out and again at traffic lights went into limp mode. 

 

I then put 1 bottle of 400 ml bottle of forte turbo diesel cleaner in took it to liverpool (from manchester) absolutely thrashed the living daylight out of the car doing 70+mph in 3 rd gear (safely obviously without breaking any laws) then stopped the car when I got off motorway in Liverpool again and went staright back into limp mode! 

 

Took it for another diagnostics 2 days ago and came up with the codes 40200 exhaust gas recirc flow excessive and 40300 exhaust gas recirculation circuit..basically the egr valve needs cleaning, so theyv cleaned it out but it is still going into limp mode they tried resetting it via comp too but resulted still being in limp mode.

 

Think it might just be the case of getting a new egr valve??

Has the car had the emissions update fix done? as your egr might be covered by that otherwise it will be expensive to replace as access is very restricted and very labour intensive to replace.

What is the emissions update fix??

18 minutes ago, MrSR said:

What is the emissions update fix??

Its the fix to remove the vw emissions cheat software but there are known issues regarding egr failure after the update hence a two year warranty to reassure customers to get the update done.

will i need it with the car being a 2010 plate?