surging idle with fans on
 

Hello all. I have a 93 RX7 that I just recently put a "tuned" ECU in. The problem I am having now is that whenever the fans kick on, the idle goes up to about 3000 rpms and surges from there to 3500 repeatedly until they shut off again. It did not do this with my stock ECU, but I really don't think the idle control worked with that one, it would almost die with the AC on and it doesn't do it with the new one- so I don't think it is a good comparison. I don't think the problem is ECU related (I hope :) ).. Any ideas? Thanks in advance!!
Joe

Anybody? This is really confusing me :).. Thanks.
Joe