Seen that before. No help
I have seen that one, as well as others. I just cannot make heads or tails of it. I have asked my brother to have a look at it, and he said the same. I really need pics of the left side of the engine compartment, as you look at the engine from the front of the car, that show where the lines route to. The vacuum tree, as well as the lines on the two valves? on the shock tower. I replaced these, after testing them. Also, the line under the intake manifold that runs to the pcv valve. I understand it is easy to improperly route that hose.
Symptom: With the car at idle, or moving down the road, the check engine light comes on. Accelerate, and the light goes out. Decelerate, and the light comes back on. No codes when I do diagnostic. My brother recommended a mech who works for the county, on trucks. He moved lines around, teed lines into other lines, and I know that wasn't right, so I put the lines back to the way they were.