E200 surging

[PMCB]

A few times now after I have topped up with oil the management light comes on and the goes out after a few days. After its lasst service with a complete oil and filter change (genuine parts) the light has come on and stayed on with a slight surging of engine speed, Mass airflow code shows, replaced unit but no effect. Any ideas?

 

[Cole@MBS]

How old is it??

 

[television]

Most surging is down to an air leak in the inlet somewhere, do check all of the vacuum pipes

 

[PMCB]

it's a 2003. The problem has been there for 9 months as I say twice after topping up oil, light came on but went out within a week, but not this time. Only had it 4 weeks when the timing chain slipped, luckily no damage, replaced chain and tensioner, seemingly there was an issue on this model but denied by mercedes. Again there was a link between oil and tensioner. Where are the vacume pipes to be looked at, what might the connection with oil be. I have checked for leakes on harness but nothing not a drop.

 

[Cole@MBS]

Start disconnecting the engine loom plugs and check for traces of oil!!

 

[PMCB]

Have already done all harness checks but no sign of a drop

 

[Cole@MBS]

Is the new Mas a good one or a cheap f,bay item?

 

[PMCB]

from MB. Put the original back in and no difference. £200 well spent eh!

 

[Cole@MBS]

You need the wiring tested now then from the mas sensor back to the engine ecu!

 

[BlackC55]

Thats a 271 engine I think Col.

Check under the air intake (air filter housing has to be removed) and you will find a split breather pipe causing your issues. About 7 quid from mb

 

[PMCB]

just finished, but no luck pipes are in good condition.Thanks for your input but no cigar on this one.