Do you know which of the fuel injection pressure testers that PP sells will work on my 73 1.7L DJET?
I don't believe that Pelican (or anyone) sells testers for D-jet EFI. Pelican at one point did rent them out, but I don't know that they do any more. You might ping Glenn@pelicanparts.com in our sales department, he is more tied into what is available and what is not.
You might talk to Racer Chris over at Tangerine Racing in CT. He and Ed (ejm) know 914s well and may have access to a tester.