Good morning, folks.

I buttoned it back up this morning and tried to vent it by looseningthe secondary filter connection. Using the hand pump caused it to spurt as you'd expect.

I also pumped with the system closed. I got the usual IP squeak. However, I also got a bit of "gurgle" coming from somewhere else. Maybe the fuel tank?

It fired up a bit easier this morning but was still nailing until I revved it up, then it disappeared.

There were no bubbles in the clear lines. Each line has fuel when I loosen the injector line.

That being said, it appears as though the primary filter is on the verge of being sucked dry. The darn thing is almost empty at idle.

Could it be something upstream clogging the line? Lifter pump not sucking hard enough? FWIW, the old mesh screen was fine when I pulled the tank and there wasn't anything icky that came out with the last bit of fuel.

Maybe it was how I installed the secondary filter? I removed the canister lid, plucked out the old one, and inserted the new one. There was still diesel in the canister and it overflowed when I pushed the new one in place so I didn't see the need to add any. That being said, it didn't want to go down all the way by hand, but seemed to be ok once the bolt started snugging up. I did replace the filter gasket, btw.

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1974 240D "Boldie" 170K.- New timing chain/freshly rebuilt IP/replaced valve seals/injectors/upgraded stereo/new Bilsteins with Yokohamas/fresh paint and rocker panels plus lots of welds.