Wait a minute. Am i getting something wrong here?
There’s 3 l/min flow out of the pump. Why are we talking about replacing pump, filter, etc?
The car was recently running. Cleaning the tank???
If I understood well you have an engine that doesn’t start and your objective is to get it running, not to replace parts left and right for the fun of it, right?
If that’s the case, and ONLY if that’s the case simply remove, check and clean your main pressure regulator. You have 2,4 bars when it should be at 5,8. I bet you one or all of the 3 o-rings there are either broken or missing. No need to buy a full (expensive) unit. Nothing to do with the wur to answer your previous question. Or, your return line might be clogged.
I would start there until you get fuel returning freely back to the tank and your system pressure is at 5,8.
Good luck
Ps.: sure, cleaning the tank is always a good thing. Replacing every part no doubt is a good idea too. But all depends on your own scope in your adventure with the car. You did a fuel flow test, was the fuel clean? If yes, leave the tank alone for now and put it in your ‘continuous improvement’ bag. Magic doesn’t exist with these systems, thinking you replace a part and BINGO your engine will start. There’s rather understanding of the functioning principles and TONS of fine tuning. Specially with the KJet, plug-and-play like modern semi-mechanics won’t get you there and your bill and frustration will reflect just that.
Robert