Merc Turbo Not Working?

[Vita]

Hello all,

Have a Y Plate C220 CDI Auto Estate,

This has been going on for quite a while now. Seem's like the Turbo in the car isn't working. I'll floor it and it's just redline and no pull/torque? Gear changes are sluggish and tthe whole car feels slow.

Someone told me it could be because the MAF (Mass Air Flow) Sensor is buggerd, could this be the problem?

Thanks.

 

[Vita]

If the MAF is buggered then it should run on "limp home mode" where the car feels slower and less smooth but the engine internals are safe on this setting. Are huge plooms of black smoke pouring out, thats usually a pretty surefire way of seing if your turbo has gone/loss of pressure.

Yeah that's what I think it is in, feel a lot lot slower. Even when you put your foot down, it takes ages for it to pick up speed. Black smoke does come out quite a lot actually, just seems there is a huge loss of pressure.

 

[Vita]

It's not too much, when the car revs doesn't come out, when you release the pedal then some does.

 

[Vita]

Surely if it's buggered then the ECU will trip some sort of warning. The VWs tend to give an emissions warning when the MAF is stuffed. No nasty flashing lights on the dash?

Nah no warning from the ECU. I'll have to get it hooked up to a STAR and see the outcome. Read a couple of forums saying most likley MAF and needs cleaning/replacing.

 

[Vita]

Faintly yes, only when reving, it's really faint but you can hear it. At high revs when driving, all you can hear is the diesel engien being noisy lol.

MAF's buggerd, so don't think it's allowing much air to go in, if that's how a turbo works?

 

[Vita]

My dad has a C270CDI, same model as yours, and the exact same thing happened with him. Air flow sensor.

Cheers, I'll have to sort that out then.