Jump to content
yllilepaja

Diesel won't start - what can I do?

Recommended Posts

Hi,

 

from my point of view, you have to check:

 

- defect code memory

- diesel filter

- fuel pump (near cylinder head)

- glow plugs

 

regards

Share this post


Link to post
Share on other sites

"defect code memory" = read the error codes. Do you have access to VAG-specific diagnostic tools or at least a ODB2 compatible reader?

Share this post


Link to post
Share on other sites

Yes i have read the error codes but nothing evry thing okay fuel fillter i have replacet yesterday fuel pump okey

Share this post


Link to post
Share on other sites

When replacing the fuel filter, the casing can crack easily. The crack isn't always very visible, but allows air into the fuel system over night. That would explain why the issues only occur in the morning.

Share this post


Link to post
Share on other sites

But the funiest thing is wen it starts i have no more problems all day till next morning the battery is new with 100 mah and one boost with 30%

Share this post


Link to post
Share on other sites

As I said, check for hair fractures in the diesel filter housing. Takes a few hours for enough air to seep in to become problematic.

Share this post


Link to post
Share on other sites

I don't drive a TDI, so I'm not sure, but as far as I remember, unlike the bigger VW/Audi TDIs they don't have a pump in the fuel tank, only the one one on the engine block. This is why air in the system is such a problem, the pump then runs dry and has trouble generating enough vacuum to pull diesel from the tank.

 

Official documentation says there actually IS a fuel pump in the tank, but that is not correct - maybe one of our diesel drivers could confirm this?

Share this post


Link to post
Share on other sites

No pump in the fuel tank. Pump in front generates vacuum and pulls the diesel from the tank. Check the diesel filter housing, it often cracks when changing the filter. These cracks can be very small but big enough for air to get into the fuel system.

Share this post


Link to post
Share on other sites
Hello,
I am interested in buying an A2, diesel, has someone for sale?
Thank you

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

Terms of Service here: Terms of Use, Privacy Policy here Privacy Policy and cookie information here: We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.