For what it's worth I thought I would share a recent success. I built this DIY injector tester and cleaner and it worked great. Putting an old 73 911T back on the road after its been sitting for over a decade so I was concerned about the injectors. All the injectors were partially clogged and would start leaking around 180 psi but after pumping some cleaner through them they all eventually started firing right at 240 psi with a nice mist and whistle. Nice when something actually works out.
