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VICS tuning, cooling fan on 1992 Ford Escort

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Does anyone know how to fine tune the VICS rfl valve? where is it located, and how? Also, my engine cooling fan only turns on when my a/c is on. otherwise the engine gets hot. any ideas?
(1) Answer
Your cooling fan system is defective. It could be a relay or a sensor. We know the fan works because the A/C turns it on. The VICS valve is controlled by the computer, so to change its behavior, you need to reprogram the power train computer. Some speed shops can do this, but then your car will not pass an emissions test if you have them in your area, which I believe you do.