.. Before we can help any further, you may want to tell us exactly what you have here ..
Is it an IL-6 /M130 engine [ which I assume it is b/c your other post say 280sel] .. or is it a 4.5 , as you are showing us a picture of a V8.. and you also show us a Injection pump from a 911..which is not applicable at all to my diagnosis.

What is the chassis/model??? ...please......

If it is the IL6 , then the CSV is the single wired solinoid at the center of the engines intake plenium, on the right side [passenger] of the car. The test port/hex is just below the CSV.