V10 Limp Mode - Did rebuild of turbo actuator fix your problem? - Club Touareg Forums
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post #1 of 44 Old 09-04-2016 Thread Starter
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Question V10 Limp Mode - Did rebuild of turbo actuator fix your problem?

Hi All

I have a 2004 V10 Touareg which has intermittent turbo failure, resulting in the car going into limp mode. It's seems everyone with a V10 has the pleasure of this problem!

The current scans show:

ENGINE ELECTRONICS
1 fault present
16562 ( P0178 ) Fuel composition sensor circuit
LOW

ENGINE ELECTRONICS 2
1 fault present
18361 ( P1953 ) Turbocharger ECU 2
DEFECTIVE


The previous scans on many occasions show:

Number: P195300 (P1953): Turbocharger (TC) control module 2 Faulty
Error Type 1: TBD
Error Type 2: Intermittent

What is the diff between the ECU fault and the control module fault?

The limp mode happens more frequently when the car in under load, or going uphill, but can happen anywhere. It is becoming more and more frequent. It will either not go above 80km/hr with my foot on the floor, or goes into full blown limp mode and won't go over 20km/hr. If I turn the engine off, and restart the car, the problem is fixed. I get no warning lights on the dash.

Recent work to the car include (due to other issues):

Car injection flush
Clean quantity control valve
2 new batteries
Clean of wiring and connectors (I think under front seat)
New vacuum pump (due to oil leak)
2 new fuel sender units

In the past I have had the turbo looked at. They disconnected the rods to find that they move freely. The actuator was found to be stiff, binding and noisy. The linkages were lubricated, with little improvement in performance.

Before contemplating removing the engine, I am thinking about getting the actuator rebuilt by these people ECU Testing in the UK:

VW Touareg TDI Turbo Actuator Fault

Has anyone had this rebuild done and solved their limp mode???

What other things should be looked at other than the C-clip and the actuator pin?

Thanks
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post #2 of 44 Old 09-06-2016
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Garage
I too would like some information on this. 4000 miles after my extensive rebuild, I am getting the 18360 code, that has now progressed to the point where I can't really drive it much due to it being in limp mode all the time.... Blownvette was right, I should have stuck with the stock turbos I guess and not gone with the bigger ones. Oh well, live and learn I suppose.

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2004 V10 TDI, Colt Stage 2 Cams, 211K Miles
2008 V10 TDI, 92K Miles
2015 Audi Q7 3.0 TDI, 52K Miles
2105 GMC Sierra Duramax, 48K Miles
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post #3 of 44 Old 09-07-2016
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Look on Google or Youtube on how to decarbonise a VNT turbo.
You just spray Mr Muscle in, let it soak a bit and work the mechanism until it's free.
Mr Muscle is the same as the "proper" stuff but is better because it foams.

Another thing to check is the turbo seal. Your intercooler could be full of oil.
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post #4 of 44 Old 09-07-2016
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Quote:
Originally Posted by 04V10 View Post
I too would like some information on this. 4000 miles after my extensive rebuild, I am getting the 18360 code, that has now progressed to the point where I can't really drive it much due to it being in limp mode all the time.... Blownvette was right, I should have stuck with the stock turbos I guess and not gone with the bigger ones. Oh well, live and learn I suppose.

Maybe you just need to get on VAG and tell your system not to be so sensitive to boost.
It's ok if you use good fuel.
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post #5 of 44 Old 09-07-2016
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The actuators fail because the vanes are carboned and stick.

If you rebuild the actuators the new ones will also fail if you don't unstick the VGT vanes.

All vw/audi engines must use 507.00 spec oil except non-DPF R5/V10 engines that must use 505.01/506.01
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post #6 of 44 Old 09-07-2016
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"The actuators fail because the vanes are carboned and stick"

is this hard to do 4eP'?
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post #7 of 44 Old 09-07-2016
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I don't understand the question.

Overtime the VGT vanes carbon up making the actuator motors work too hard and eventually strip/fail/burn.

So if you fit a new actuator mechanism but you don't clean the sticky VGT vanes the new actuator will also fail.

All vw/audi engines must use 507.00 spec oil except non-DPF R5/V10 engines that must use 505.01/506.01
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post #8 of 44 Old 09-07-2016
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Quote:
Originally Posted by Ragman View Post
"The actuators fail because the vanes are carboned and stick"

is this hard to do 4eP'?
If you mean is it hard to decarbonise the vanes, see my previous post about decarbonising the VNT.
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post #9 of 44 Old 09-07-2016
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yes I wanted to know what is involved in cleaning the VGT vanes, ie engine and turbo removal.

I will search for it.
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post #10 of 44 Old 09-07-2016
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Quote:
Originally Posted by Ragman View Post
yes I wanted to know what is involved in cleaning the VGT vanes, ie engine and turbo removal.

I will search for it.
I wasn't being rude or imperious when I said to do a search.
There's a lot of good information put out by people who have done it.

You can do it with the the turbo in place on an R5, don't know bout the V10.

Pretty easy.
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