Can any experienced W124 owners solve this?

[Parky1]

I have a problem on my W124 230CE manual.

The car starts fine, idles fine, and drives fine.

However when I am slowing down and depress the clutch to change gears e.g. coming to a round about or even when I come to a stop at a junction and depress the clutch, the revs go very low to about 500rpm sometimes less to such an extent that the engine 'shudders'.

The revs go down but don't stay there, just touch say 500rpm and then shoots straight back up to normal idle speed. When the revs drop and come back up, obviously the oil pressure does exactly the same.

If I am driving at a constant speed and then depress the clutch to change gear or even put it in neutral, the revs are fine.

Its like say if I am at 2000rpm and press the clutch it goes down to 1000 no problem. If I am at 1000 and the depress the clutch it goes down even further.

Can anyone solve this problem?

Thanks, Luke

 

[DouglasMM]

I had something similar with mine and it turned out to be the O2 sensor, very easy to check with a multimeter. Google W124 oxygen sensor test and you'll get the procedure.

- D

 

[grober]

Sounds as if your clutch is not fully disengaging- Have you checked the fluid level? Also have a look at the clutch slave cylinder for leaks.

 

[Parky1]

Ill check all the points mentioned

Thanks for the help!

Luke

 

[Parky1]

Forgot to add. It also does it on start up.. so starts fine straight up to normal revs but then drops back to 500rpm before settling at normal speed.

Not sure if it will be related to clutch as you said? As it does it with both clutch engaged and disengaged on start up

 

[coupe addict]

You could usefully check the section of the wiring to the MAF sensor where it clips to the back of the block. Overheating here above the exhaust can damage the insulation (slit the outside case to see) and then produce quite weird effects on engine speed.