Скачать или смотреть Air in Line Fix Last Ditch Effort VW TDI 1.9 Diesel ALH

This explains what I did to fix an issue with air in my fuel lines on my 2002 VW Jetta diesel with ALH engine. A Mr. Gasket #12D "clickety clack" lift pump was installed in my engine compartment to keep my injection pump from introducing air into the lines inexplicably (available from many sources online and local parts stores).
There are many other things that could be introducing air into the line that you may want to consider first. The likely culprits are bad o-rings on the T-fitting on the fuel filter, fuel pickup issues in the tank, or leaky fuel connectors etc. I had already ruled all of these things out. A mighty-vac is a good tool to help narrow down where a leak may be occuring.