Jan,
That’s good news that it’s showing signs of life!
I found the fuel system to be the most difficult aspect of my car to understand.
It’s beautiful in concept, but hell if it gets out of wack.
I reread all of your posts and have some questions, just so we are all on the same page.
Your car is a K Jetronic system, correct? It is a “simple” CIS system, right?
You said that it stopped running 6 months ago.
Was it running well? It it just abruptly quit?
While you are on a work break, I think that you are probably right that you are probably headed to measuring the system and control pressures, so you might order a CIS fuel pressure test set with lots of adapters. You will not know what’s happening with the system without Knowing the pressures.
Another thing that you could do is to run some sort of cleaner through the system, particularly because it’s been idle for some time. I use Techron, but many other swear by other products. You can circulate the fuel and cleaner by jumping the fuel pump relay.
Here are a few more references that you may find useful.
forums.pelicanparts.com/porsche-911-tech...hooting-dummies.html
forums.pelicanparts.com/porsche-911-tech...jetronic-issues.html
rennlist.com/forums/928-forum/807102-cis...nal-reflections.html
Hopefully, you will not need these, but here are some places to check the injectors, WUR, and fuel distribution, if needed. CIS injectors can not be rebuilt. Roger At 928sRUs can get You Bosch or Mercedes, should you need them.
WUR and fuel distributor testing and rebuild:
www.cisflowtech.com/
Injector testing:
www.witchhunter.com/
Good luck!