T4 is going out...

Our T4 TDI 111kW sometimes cuts out while driving at high speeds (over 160km/h) and restarts after a few hundred meters or so, usually after 10-30 seconds. This often happens when the tank is only about 1/4 full. What could be the cause? Is the diesel foaming so much that it can no longer be sucked in? As I said, everything will be fine again afterwards.

Hi,

and what then is in the error memory...?

Hello

Andy

Unfortunately, nothing! And the workshop has no plan!

Hello,

without further consideration, it sounds very much like relay 109 (motor management power supply)...
I don't know if it's even installed in your model.
If you find a relay plate with a '109 - Made in Tunesia' label, that's a likely candidate.

Hello, Rainer

The relay has been replaced twice already, but without success...

Did you definitely take a long, sharp right-hand turn before each time?

is a common problem with the T4. It sucks in air.

either fill up the tank or take your foot off the gas in the (sharp) turn.

@ Maniac: So, wie ich erwartet habe, er saugt also Luft. Never drive with less than 1/4 of a full tank.

it's enough to make the gas pedal easier to use in such situations (empty tank and long curve). not digital gas.

I always drive until the light turns red. No problems.