Thanks for the reply.

The fuel filters have not been touched.

We just changed the lines coming from the tank going to the filters and one main return line.

I got it back and noticed a significant loss of power and took it back.

They have bled down the system several times with the same results.

__________________
1960 190D (college car), gone
1995 E300D, 325 k
2019 LEXUS UX 250h (spouse mobile)
2003 Nissan Frontier Crew Cab, 125K
2007 Jeep Grand Cherokee Overland 3.0L MB diesel, 200K
1978 GMC Classic Motor Home