I do not think a carpeted tunnel could conceal the PAS motor attached to the steering column, so I do not think you have it. If you should want it, the EZ system is highly recomendable, completely transforms the handling of the car and also makes it safer, in my opinion. This spring however I had an experience similar to yours - the steering being very light or very heavy with short intervals - as if my PAS were badly connected. It was not, the explanation was that my kingpins were so worn and with so much friction/stiction that the PAS simply did not cope. After changing KPs everything reverted back to normal. Most likely you do not have PAS, my my experience makes me think that your problem is related to KPs, worn out or without grease. Start with greasing, and see what happens. Good luck!
