M271 engine with idle problem / unstable rpm

Mar 30, 2014 | 03:23 PM

Skelterize

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Newbie

Joined: Feb 2014

Posts: 9

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W124 E230 90 (M102) & W203 C180K 03 (M271)

M271 engine with idle problem / unstable rpm

Hello boys and girls

Could use your help on a idle problem for the m271 kompressor engine. (c180 komp)
I've been searching the forums but couldn't find any answer related (or rather a billion different answers)
So to be more sure I would like if you guys could help me out.

(video below)

Seems like it's random, some days its stable and some days its not.
But what I can tell is that when Im reversing the car starts / tries to stall when coming to a stop. Same thing could happen when in drive and stopping at a red light etc. The CEL is on.
Also had a problem when the car would jerk and could hear the exhaust stutter like a lambda malfuction. turning off the ignition and starting again would fix the problem.

I've replaced the fuel filter and spark plugs.

Please help me out??

(sorry for my English, not much used anymore)

Regards
Skelterize from Norway

Mar 30, 2014 | 03:27 PM

Skelterize

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Newbie

Joined: Feb 2014

Posts: 9

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W124 E230 90 (M102) & W203 C180K 03 (M271)

oh, Just a note..
On the video the rpm is stable until I accelerate, when I let the pedal go the RPM drops and almost stalls then tries to correct itself.

Mar 30, 2014 | 08:32 PM

VVF

MBWorld Fanatic!

Joined: Sep 2011

Posts: 1,657

Likes: 35

From: Austin, TX

2005 C230K(sold), Mk7 Jetta

What code(s) does the OBD scanner show?

Does it make any chirping kind of sound when the RPM is jumping?
If yes - it might be the alternator pulley; how long ago have you checked it?

Apr 1, 2014 | 02:36 AM

Skelterize

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Newbie

Joined: Feb 2014

Posts: 9

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W124 E230 90 (M102) & W203 C180K 03 (M271)

Went back under the hood to take a look, found out the pcv hose were obliterated.
The diagnostics showed alot of different errors all the time after deleting them.
But now that the pcv hose is replaced shouldn't the errors go away by them self?
I had a chirping noise when it was jumping, but now that the car runs smoothly again its gone. Should I still replace it? As of now the car runs like it should, only thing bothering me is the CEL... :-)

Last edited by Skelterize; Apr 1, 2014 at 02:40 AM.

Apr 1, 2014 | 05:08 AM

gmphertford

Member

Joined: Oct 2013

Posts: 78

Likes: 1

S Class

Under the air box is a rubber hose they always perish and split causing running problems.

Apr 22, 2014 | 09:57 PM

jtwillia2

Senior Member

Joined: Jul 2010

Posts: 250

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From: Charleston, SC

2005 C230K

Sounds exactly like the problem I used to have. Check out my thread here:

https://mbworld.org/forums/c-class-w...-fix-free.html

Apr 23, 2014 | 09:15 PM

kimito

Member

Joined: Feb 2009

Posts: 126

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From: Canary Islands, Spain

Sportcoupe SE C180K + SC C180K Indianapolis

I had the same problem with the rubber hose. I took it to the dealer several times and they were not able to find the problem. After sometime my motor stopped working and started to work in 2 cylinders. The problem was because by the time the dust started to deposit in the valves until the could not open properly till the point it affected many other parts from the top part of the motor. After long discussion MB really noticed about this problem but did not recognized as a factory problem. In both of my c180k happened the same but one of them was not found this problem by the local MB dealer. I recommend you to solve it as soon as possible.