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I just checked a CUCV, and the sensor is indeed on drivers side head, in the back, behind the #7 cyl of intake manifold. You can confirm this by checking continuity from fast idle circuit to sensor. The sensor I remembered on passenger side is on some civy 6.2s, on CUCVs there is a plate...

That is fast idle solenoid, it is in circuit with IP timing advance and its purpose is to have faster, lower emissions warm up of cold engine. The part is getting hard to come by, especially at reasonable cost. If you can't find used or rig up a return spring, they cost about $150, last...