Can anyone tell me where the fuel lift pump is on my 2002 VW Jetta TDI? on 2002 Volkswagen Jetta TDI

Have been having problems with power issues, will barely move, almost like the turbo is gone, but it checks out fine. The fuel pump is working; my husband says he thinks it could be the fuel lift pump, or the relay that makes it work. Any help would be very much appreciated.

Asked by for the 2002 Volkswagen Jetta TDI
most like is the egr valve cloge up