A buddy of mine just got his 1st car, 350z......bastard... He showed it to me yesterday, as I was envying it he asked me if I knew how to fix his tachometer? I said probably not but whats wrong? His RPM needle jumps around in like 1k increments back and forth. He asked if I knew how to fix it. Me, not ever working on a car in my life (want to learn though!), said no, but I would ask around for him. So a couple questions come to mind here. 1. Is it an easy fix? 2. Would it be easier to just get a new tach? 3. How many things could be wrong?