I have a 1994 Honda Civic Ex and its giving me problems. I already took it to 4 mechanics and no one seems to know whats wrong. I was wondering if someone could help me find the problem. The car revs up and down when it gets warm on idle. It does it when you step on the accelarator. It bounces up and down for about 10 seconds and then goes back to normal. I've notice that this happens when the fan turns on. This problem makes it hard to drive because it stalls when it does this. Can anyone help me?