larsianer

At low rpm, the car is really slow to aclerate,when i press the throttle,and drive uphill, it can take 2-3sec before the car start to aclerate,there is also alot of turbo whistle when i drive.
At high rpm,the car seems fine,so i am thinking that something is wrong with the turbo,i have no error codes showing,are there any parts in the turbo that i can try to clean?,i have tryed to clean the egr valve.it got a little better,but there is still to laggy.so please help me,what shall i check/clean

Its a w211 220cdi 2008 mod,with 422 000km..i just changed the automatic gearbox and the converter,so those parts are fine.

Lars

larsianer

I have checked the rod,that controlls the vains,it moves freely,i removed the clips,and tryed,but are there any way to check the solenoid,that moves the arm the the vaines?

And where is the tcm unit?,the unit that sometimes get flooded by gearoil?

mersum1es

7G box? TCU is inside transmission housing, already in oil bath...

5G TCU is in passenger footwell.

You said you changed gearbox and converter, you should always reset adaption values of the TCU when parts of tranny are changed.

larsianer

thank you, i will go check if there is some oil in it, what can make the car hessitate, i have taken the reset, with press the throttle, and hold...

do i need a software change?

mersum1es

Thats a half urban legend, actually you just reset some gas pedal adaption. True transmission reset is done only via star diagnosis system.

Whistle means you have a boost leak, which may be seen by car air mass flow/boost pressure which again may control gear changes... check for splits in turbo hoses, intercooler condition (no cracks in cooler ends), intake manifold swirl flaps moving... you can also see turbo actuator moving when revving engine.

larsianer

do all 220cdi engines have the intake manifold swirl flaps?
i have the 2008 model, and i cant find them, are them under the manifoild??

what hoses can crack??

sorry for naging, but i really want to find out,whats wrong

Lars

larsianer

can the intake manifold swirl flaps be under the lid here??

mersum1es

In my I6 engine connector bar between flaps is clearly visible between intake manifold ducts (yes flap actuator linkage is below manifold), I think all modern engines have them.

I refer hose from turbo to intercooler (most common to split/leak/misaligned), but when you say you have whistle noise it means you deffo have a boost leak somewhere, and it can be anywhere between turbo and cylinder intake air path (including cooler, EGR, empty swirl flap actuator hole).

Edit: I have not seen any facelift engine manifold so cannot say for sure how swirl flaps are visible...

larsianer

thanks for answer, i will try to build me an turbo preassure tester, and check the hoses, but shall i only plugg the compressor in the turbo inlet??
and what is the max preassure i shall use?

mersum1es

You can start by checking all hoses only eyeing is there are splits or cracks, are all hoses tight in place, cooler is solid and fittings ok. Then you can rev engine stationary and try locate whizzing sound (we must remember it could be worn turbo also!)

If you want make a pressure test, I cannot say how much pressure you should use, I believe you'll find it at less than 1bar over pressure.