Engine surging???????

[suziguns]

Hi All,

I was just wondering if anyone could help me with a problem that has occurred with my R plate CLK230 Sport.
Sometimes it loses power, its almost as if I get to certain point and then it gives no more, it will then lurch and then a surge of power comes through, if on the Motorway I can get to 80mph then if I ask for more it does the same can anyone please shed some light on what I need to get done and maybe what the problem is.
Any info greatly appreciated.

Kindest Regards

SuziGuns
x

 

[television]

Could this be a MAF on the way out

 

[suziguns]

Engine Surging

Hi Television,

Thanks for your post reply.
I have changed the Air flow sensor and to no avail, so any ideas?????????
Thanks for your time

Suzi-Guns
x

 

[jberks]

Try the O2 sensor - The MAS and O2 sensors work together.
Ideally it needs a diagnostic though.

 

[suziguns]

Engine Surge

Thank you, for replying to my post, will try what you suggest and let you know how things go...meant to be delving deep into the trouble tomorrow night, so will post back then.
Once again all help really is very much appreciated..really kind.

Luv Suzi-Guns
x

 

[Balal]

deja-vu !! thats exactly what happened to my CLK230K sports...
other than changing MAF, I had to get my kompressor cleaned (well! twice, firts time dealer celaned it without changing the wee valves in it so it got clogged again after 6 months and so I had to pay twice for it) ...
I also changed catalytic converter and back pipe before i got kompressor cleaned...but no effect...
best idea is to take it to dealer and get diagnostics done. It seems like same problem that happened to my car. Mine didnt work after changing MAF as well... And get ready to fork out £600

 

[suziguns]

arghhhhhhhhhhhhhhhhhh

Hi Balal,

Great! Fantastic news.....another £600 quid!!!!!!!!!!!!yipeeeeeeee.
Anyway, thank you for giving me this advice, although crap news it's nice to know what needs to be put right not only that its actually happened to your own car.
Will update you on what happens.

Cheers

Suzi-guns
x

 

[jimsinessex]

deja-vu !! thats exactly what happened to my CLK230K sports...
other than changing MAF, I had to get my kompressor cleaned (well! twice, firts time dealer celaned it without changing the wee valves in it so it got clogged again after 6 months and so I had to pay twice for it) ...

Balal, I am intrigued by the reference to valves in the kompressor. As far as I know there are no valves in it. I have an old kompressor and can see nothing on it that looks like or could be covering up any valves, what would these valves do. The only valve on the system is the one that sits on the aircleaner and acts as a byepass when the clutch is disengaged and as a wastegate/pressure control valve when the kompressor is working. Did you actually see the valves? Googling "Eaton Superchargers" turned up an american site with a picture of all the parts of our kompressor, again no valves were shown or referred to.
Second question is what would be clogging up the kompressor in the first place. Even at the height of the "oil in air intake saga" my kompressor did not require cleaning to restore performance.

Suzi, I would suggest you spend money on the kompressor only when all other possibilities have been exhausted. The O2 sensor should be next as suggested above.

Your symptoms do sound exactly like the MAF sensor even though it has been changed. What mileage has the car done, if up around the 90,000 mark you may be getting oil in the air intake which could quickly contaminate the new MAF sensor. Do a search for the "oil in air intake thread" where I have posted a lot more information on solving this problem.

Good luck, Jim

 

[television]

I am always so pleased Jim when you come in on these turbo issues

thanks

 

[oigle]

Re surging, Suziguns, just to take a different perspective, could it be as simple as a sticky throttle cable? As many of us know, that can create all sorts of driving problems and can be very annoying. Might be worth looking at before spending squillions!!

 

[C220GJS]

Jim, I remember when Balal had this problem and it was the breather nipples under the inlet ports on his cyl. head which had blocked and had to be changed.I can't remember the exact name for them and I can't get onto the Russian site just now to show them on a diagram but I am sure that's what he is talking about.

 

[C220GJS]

Follow up to last night's post , no.32 in this diagram;http://www.detali.ru/cat/oem_mb2.as...GM=717.460&CT=M&cat=19K&SID=01&SGR=065&SGN=07.(part load breathing nozzle.)

 

[Balal]

Morning everyone
Right! found the thread where we discussed that,
http://www.forums.mercedesclub.org.uk/showthread.php?t=20774

in short...this is what the mercedes dealer work sheet looked like..

"
M111 EVO fault code P2008(4):82/5 Hot Film
mass air flow sensor (HFM)(HFM-SFT))
plausibility error of mass air flow
sensor/throttle valve

M111 EVO (model designation
111.951/955/965/957/958/981/982/983

oiled-up HFM(HFM-SF) due to plugged or partialy closed nozzles of engine partial load ventilation.
Clean complete charge air system (engine oil collects in charge air cooler). Replace both partial load ventilation nozzles and the check valve. TO replace the partial load ventilation nozzles, the intake manifold must be removed.
Partial load ventilation nozzles(2 each) in cyclinder head:
A111 017 00 12 Check valve: A111 010 0091,
Hose lines if required (2 each): A002 094 0182. "


and finally an extract from the reciept

Replace partial load ventilation nozzels
a1110170012 x2
a1110100091 x2
a0020940182 x2
a1110181582
clean out system = £445.00
-------
A1110170012 Nozzle 2 x 0.97 = £1.94
A1110100091 VALVE 2 x 7.91 = £18.82
A0020940182 Hose 2 x 2.05 = £4.10
A1110181582 Hose 1 x 3.70 = £3.70
ST015 Brake Clean 1 x 3.49 = £3.49
--------
£474.05
Tax £ 82.96
Total £557.01

while we are on that topic .... i feel that sometimes there is an acceleration lag!!! is it normal in kompressor engine ?!?

 

[Balal]

O re the accelaration lag.... teh traction control doesnt kick in as light doesnt flash.

 

[jimsinessex]

Balal,

All the parts you refer to, nozzles, check valve are part of the crankcase breather system under the intake manifold and not part of the kompressor!

Your worksheet referred to cleaning the "complete charge air system", I would be amazed if they had opened up and cleaned the kompressor itself. The old kompressor I have sitting on the dining room floor as I write (don't ask!) was the one on the car during the "oil in air intake" saga, has never been cleaned and is spotless inside.

Suzi,

Often when MAF sensor contamination is discussed the kompressor gets a mention as a possible source of the trouble. It is a complete red herring but if followed through can be a very expensive one!

Jim

 

[Balal]

Balal,

All the parts you refer to, nozzles, check valve are part of the crankcase breather system under the intake manifold and not part of the kompressor!

Your worksheet referred to cleaning the "complete charge air system", I would be amazed if they had opened up and cleaned the kompressor itself. The old kompressor I have sitting on the dining room floor as I write (don't ask!) was the one on the car during the "oil in air intake" saga, has never been cleaned and is spotless inside.

Jim

Kompressor on dinning table!!!!!!!! good use of table i must say!!!

O thanks for that, I was of idea that the breather system is/should be part of kompressor.

My understanding of kompresor is basically "air intake system that not only inhales air but compresses it as well" . is it not right ?!?

So are these nozzels in cranckcase breathe system very hard to access and is this work worth over £400 labour ?! ( deep inside I am hoping the answer to be YES so i dont feel bad about paying the dealer twice in 6 month period for it )

 

[C220GJS]

Balal, the Autodata time to remove and reinstall the inlet manifold on your car is 2.50hrs, add 0.50hrs for changing the nozzles and the breather parts then work it out for yourself.:sad:

 

[jimsinessex]

Balal,

"Kompressor" is german for supercharger and only refers to the supercharger itself.

Changinging all the parts of the crankcase breather system under the inlet manifold is absolutely essential once the MAF sensor starts oiling up, otherwise the new MAF sensor will simply get contaminated again causing the misfire/limp mode to return.

The two small nozzles can be poked clear with a suitable size drill. I only replaced mine because the cylinder head had to come off for a very minor problem with the head gasket detected by the compression test I had done as part of the whole "oil in intake" investigation. Until you reported that your mechanic had changed them I didn't realise it was possible to replace them with the head in situ. It must be a s*d of a job to remove them in situ. The actual cost of the nozzles themselves was 97p each! It is worth getting them anyway if only to accurately size the drill required.

If you hadn't had the job done you would be suffering repeated MAF sensor failures to this day so the money was not wasted

Jim

 

[G MAN]

Hi SUZIGUNS I was also involved in this saga (my engine was 111 956) & concur with J Berks that its the maf & o2 sensors that need to be sorted & with the invaluable detective work of jimsinessex that the kompressor is an expensive red herring but that the crankcase breather valves do need to be looked at too, I had all this done and new coil packs too and the car was revitalised & is going as well as ever though I don't have it any more (sob) The issue with oil in the loom from the crankshaft sensor may also be worth looking out for & the beautiful minds on here will advise you if your engine is a candidate if you post up your VIN# malcolm will check it out.
make sure you go to a recommended & reputable indie with the Star diagnostic who will hopefully tell you he'e senn all this before & you wont go far wrong or get robbed.Ask for advice on a good indie in your area. Great cars just need a bit of mothering sometimes!!

 

[redmansioner]

It could be wrong in the engine itself.