51 plate Sprinter 311cdi

[Gary Cooper76]

Hi to all,

I'm after some help with my sprinter 311cdi 51 plate,

Drove home perfectly well last night, This morning taking the kids to school it felt sluggish like it had no turbo, when pulling up to the school to park the brakes was very hard to press like they had no brake assist.
Come back to van after 10mins dropping kids off, Still no turbo boost but I can hear it spinning up, brakes seem ok while engine is revving above 2000rpm soon as it drops below then no brake assist.

any ideas to what has gone wrong over night while just sitting on my drive??

thanks for any help regarding this problem

Gary

 

[E270 Owner]

Check the vacuum pump and pipes.

 

[mercedestec]

Check vaccum system , try pressure testing the system

 

[Gary Cooper76]

The vacuum pump on the top of the engine seems to be working fine, I have removed the pipe and it does suck my finger.

I have checked all turbo pipe work for splits and all seem ok.
The actuator pipe has no suction at all is that correct?

This is strange I have lost servo brakes and turbo at the same time?

 

[jaymanek]

both vacuum related, you must have a pipe off somewhere.

 

[Gary Cooper76]

Thanks guys,

I have checked all the pipe work and all seems fine.
is there a way to pressure check with an air line say?

The vacuum pump on the front of the engine seems weak it sucks my finger but with the pipe fitted and removed from the brake servo it has hardly any suction at the servo end.

Could this be the problem?

there is a black ball and what looks like an electric pump(which its not just looks like) under the air box with 2 wires connected to it what does this do could it be that or should I get a new vacuum pump first.

thanks for all your help.

 

[harryboy2]

If your still stuck take a look at this for a comprehensive breakdown of what to check

Mercedes Sprinter Turbo ? Limp Home ? Diagnosis and Fault Finding | Mercedes Gen-In