SLK 230K power/kickdown problems

[wilbur]

Hi all, while driving on the motorway tonight my SLK seemed to have hardly any power at all, I literally had my foot to the floor and it slowly climbed to around 70mph but felt like it had no more to offer. Also wouldn't kick down unless I pushed my foot right down on the switch under the accelerator pedal. After a while the car started running like a bag of nails. I turned off the ignition and restarted the car, and it ran better but still no power. I have replaced the MAF sensor, spark plugs, air filter and added a fuel treatment in the last 4 months. Any ideas?

Cheers!

 

[shorty]

Has the engine light come on yet ? The problem could be the secondary air injection system . With this fault the engine light will not come on stright away but after a few days it will . When the light comes on the usual codes are P2036 and P0410 . If this is the case than the frist component that would normaly be changed is the check valve , this is a service item that should be changed every 50k . If this is changed and the fault reacours then it is probably the air recirulation flap , these are known to cause trouble and cost around £500 . Hope this helps

 

[BlackC55]

They are difficult to diagnose but the advice above is spot on.

 

[vijilants]

Where is the check valve ?

 

[wilbur]

There is no light on yet, car seems to be running ok now, but still no power. I am getting the codes read this week so hope to find out more then!

 

[Bobby Dazzler]

The supercharged 3.2 has what would appear to be the same symptoms when the intercooler pump fails. Would this apply to the supercharged 2.3 engine too Olly?

 

[BlackC55]

Nope!

 

[shorty]

Where is the check valve ?

The check valve is located at the back of the engine on the 200k , I think that it is on the left side of the 230k . It connects to a pipe that branches of the air intake .

 

[jamesmc]

I'm trying to locate the part number for this item for my CLK230K. Been looking at the .ru site but the part seems a little elusive, to my eyes at least

Any pointers, or even the correct part number (which I assume would most likely be common between the SLK230K and the CLK230K) would be helpful.

 

[vijilants]

The check valve is located at the back of the engine on the 200k , I think that it is on the left side of the 230k . It connects to a pipe that branches of the air intake .

Is the check valve, the valve that allows air to pass directly from the airbox to the intake, bypassing the supercharger on idle / low revs but on higher revs routes the air via the supercharger ?

 

[shorty]

Is the check valve, the valve that allows air to pass directly from the airbox to the intake, bypassing the supercharger on idle / low revs but on higher revs routes the air via the supercharger ?

No thats not the check valve, that the air recirulation flap . The check valve is a one-way valve that connects the air intake to tha cats , its for cold start . The part numer is A0004701393 . On the E200 a 27mm crow-foot spanner is needed to remove it because access is limited at the back of the engine . There is a tread on MB world showing the location of the valve on a 230 , search P2036