THP power loss

[DS3RACING96]

you would ave tho they would ave sorted it out by now?

[pacsab]

you right actually it is the same engine, however it is used in some Peugeots as well for a longer time than by Citroen. So no multiple instances and reports on the problem for Peugeot and Citroen?

[DS3RACING96]

and in the mini to

[Czar]

Yepp, thanks gar074!

Yes, actually that is the PCV return hose. So -if I am right- actually they did a PCV deletion without removing the hose (I assume they have to keep the crankcase ventilation because of the emission rules, but wanted to get rid of the quite huge amount of oil which comes with it and -as you said- had even been more on yours than on my pics).

The interesting thing is that on the new THP 200 engines the whole hose is removed and both the intake and return side is capped with a kind of plug. So I wonder how they solve the crankcase ventilation on those engines. Anyone knows?

What is a "jubilee clip" (sorry I am not a native English I understand the words but not the whole phrase)? Would you post a link to a (e-store) picture of it? I am asking because it is not easy to remove the whole pcv hose, especially the intake manifold side as it is quite well hidden in the engine bay, so a kind of "leave-the-hose-there-and-close-it-at-the -return-side-next-to-the-engine-cover" solution would be nice. Maybe others on the forum are also interested.

Thanks in advance!

On the newer THP engines which utilise the double vanos timing units on the camshafts, they have internal PCV passages in the cylinder head ports for each individual runner, as they only have the 1 external PCV line, which is fed into the air intake pre turbo.

[pacsab]

Thanks Czar, very useful and new info for me.

So actually it is still kept inside and blow-by is not let into the air through some filters or anything (I know: emission control! EURO 6547875 standards. Even driver exhalation is forbidden).

I could not find proper info anywhere, so do you (or anyone) know if it is dangerous anyhow to cap thus totally delete the crankcase ventilation? Does it make any harm to you engine? Or else?

I assume not otherwise would not be done, just want to be sure.

[Dangerousfish]

http://forgemotorsport.co.uk/content...roduct=FMCTDS3

=/

[Miyu]

Citroen DS3 Turbo Limp Mode issues

Hi All
I am from South Africa and have the normal 1.6THP turbo petrol engine (the 115kw), 2011 model. I am very comforted to see similar symptoms from others - most common with Gar074.
I also picked it up as a demo model from the dealership with 10,000km on the clock. Other than 2nd gear REALLY sticking at low speeds, it went like a dream.

From my first service at 20,000km onwards I started to notice what I think you guys call Turbo Judder. It would be a second of power loss with a noticeable thud-thud-thud heard and felt before power returning. Always very quick, always random, and infrequenct; once a month. I couldn't pin point it on rev or gear, but it was normally to do with pushing the car on a freeway, either gunning it onto the freeway or overtaking up a hill or something. Gradually over a year it became more frequent to once a week where it was now a tat-tat-tat to a click-click-click sound, and now even while just cruising maintaining speed, at low revs, no real engine load.

Months into this problem, I had a random "engine fault - repair needed" display on my dash, which was suggested to be the emissions measurement detection, but there was no noticeable change in performance. Diagnostics from the dealership said no fault found and the fault display was turned off. They suggested it was from over-filling the petrol tank and getting an air bubble / air-lock. Now it seems it was actually related to the judder. This judder continued up until last week where, in time for my 40,000km service, when driving home from work I suddenly realised I had no turbo. Very clear, no boost. Chatting with the service manager, he suggested limp mode, which led me to come searching and reading your forums. He also told me that one of my previous diagnostics had returned a blocked boost valve which no-one had told me about. But in reality, it seems that the judder was related to the turbo fault and just finally gave up.

Also, I now discover from reading your problems that I also had intermittent rough idling (both on the night in question and since).

I have barely driven the vehicle since to protect from further damage (like, 30km total max).
What I'd like to know is a) is it safe to drive 100km to my nearest dealer (gingerly and at low revs yes) or should I get it towed? From what it seems, you guys all drove it for a couple days before getting it seen to.
and then b) what are the likely things to check and in what order? from what I read, it's oil leaks on the engine, the timing chain & tensioner, the fuel pump, the oil quality, the cam angle. Any particular order?

Thanks a lot!

[Dangerousfish]

What I'd like to know is a) is it safe to drive 100km to my nearest dealer (gingerly and at low revs yes) or should I get it towed? From what it seems, you guys all drove it for a couple days before getting it seen to.

Personally, I'd recommend speaking with Citroen and arranging for them to have it recovered. When my engine went I wasn't as lucky as yourself and had no warning, mine just failed. If this isn't an option then a steady drive should hopefully see you there safely.

I'd recommend just leaving the car with them. If you point them in the direction of this topic they should have some useful info to go off.

[gar074]

I was advised that mine was safe to drive while in limp-home mode, and as it was still under warranty, I was happy to take the risk.

In addition to the potential faults you mention, don't forget the clogging up of the valves, which was a big issue with mine.

[Miyu]

Citroen DS3 Turbo Limp Mode issues

Thanks for the suggestions
I have contacted them and they also recommend towing, but that's probably because I live 100km away, and they don't want to have to pay for more going wrong.

As for them reading a forum? Lol... this is SA. I don't think the repairs guys have access to PC's let alone know how to use a PC. As for the managers, well most likely CBA / tl;dr.
So I will just be the annoying customer telling them how to do their jobs by making vast quantities of suggestions :P

Will let you know how it goes to add to the pool of knowledge.

[Mark]

After 2 years of complaining, they decided finally to give me a new engine. It will take 2 weeks and they gave me a C4 Aircross 1.8 hdi 150hp. Very nice car!!

[gar074]

What prompted the engine swap, Mark? Was it just more of the usual problems, or was it terminal?

[Mark]

At 7000 km they had to refill coolant that went from max to min. At 13000 km it needed 1.5 l oil. The coolant I had to refill every 7000 km. And in the end oil was also every 7000 km that it needed 1.5 l

[Miyu]

Hi guys

Just some feedback:

So I had my vehicle towed to the nearest dealer, and they have had a look at it. Despite leaving pieces of paper in the vehicle with vehicle history, symptoms, and suggestions from this forum, ... and mailing the same information to both the service manager and service advisor... this is what they have come back to me saying:
"The timing chain has been replaced & an ecu upgrade was also done on the vehicle. The vehicle will still require a proper testdrive & then a further inspection thereafter to make sure that everything is 100% before collection."

I just lol; no surprises there. I look forward to them repeating the same mistakes I have read above over and over and will let you know if anything happens differently to what has happened to everyone else

[Chris_Blue]

Hope all goes well Miyu
Mines great- just advising- not tempting etc etc Ha!
CBLUE