Boost leak??

[Alzak]

Hi

If I do have any boost leak there will be any fault code on scan via VAG-COM ??

 

[Seatmann]

Only if you hit limp mode as far as I know, usually the ecu shuts off the turbo if the boost is outwith spec then you'll get a code for either under or over boost.

 

[Alzak]

so how to check boos leak on vag com ??

 

[Seatmann]

No idea, what problem are you having and is it petrol or diesel?

 

[Alzak]

it is a diesel and is just something wrong do not have this extra kick around 2500rpm

 

[Seatmann]

Check the maf and work from there.

http://www.myturbodiesel.com/1000q/multi/low-power-fix-TDI.htm

 

[Alzak]

is like turbo get louder as well is not whistling but You can hear it working louder than usual

 

[Seatmann]

Check for a leak in the exhaust around the turbo, you might see some black soot marks and also the flexi for the egr valve, once again check for any sooty marks.

 

[Alzak]

to access turbo there is any way from top or need to be checked on some ramps ??

 

[Seatmann]

Not sure which engine you have but most can usually be seen from the top.

 

[daz_pd]

any extra smoke out the exhaust? that combined with the louder whistle would indicate a boost leak (or failing turbo)

 

[Alzak]

I try to find if there is any leak and I do find some oil just inside red circle is a bad sign ??

this is stock photo not my turbocharger is just for reference

 

[Seatmann]

You'll have oil in the boost pipes anyway, that's normal unless it's a lot in which case the turbo seals could be failing.

 

[Alzak]

yeah but oil was outside I do not take off any pipes

 

[Seatmann]

Then yes that could point to a boost leak, check any connections down there and make sure they're all nice and tight.

 

[Alzak]

this is the problem I can't get there I checked this pipe but can't see any leak

 

[Alzak]

any idea I will need part number for new rubber pipe from turbo to alu pipe is short one how can I find out part number

 

[Seatmann]

You could try vagcat online but your car might be to new, the other thing is maybe puting up a shout for part number help.

 

[Alzak]

if N75 valve is faulty this will affect boost performance ??

 

[Seatmann]

if N75 valve is faulty this will affect boost performance ??

Yes

http://www.myturbodiesel.com/1000q/multi/low-power-fix-TDI.htm

http://www.myturbodiesel.com/1000q/multi/limp-mode-TDI-fix.htm


Here's a couple of faqs you could have a look through