Golf 3 1Z, 1996, occasionally stalls

Hello!



My friend has a Volkswagen Golf 3 TDI, manufactured in 1996, with a 1Z engine and 90 horsepower.



If you drive the car too fast, it sometimes stalls. Sometimes it starts right up and runs for a while, but other times you have to wait a few minutes before it starts again.

The error memory contains quantity-setting elements, but I already know that. Also, the 109 relay is also new.



Has anyone ever experienced this problem before?





Thank you.