I have a 92 Z28 and since I put the DFI in, the tach needle bounces at idle only. I can't beleive it has been 10 years since I installed it in. 10 years ago I didn't have access to internet like I do now. So I never figured it out or not even call Accel if there's a fix to this problem. There got to be some kind of a filter I can use to fix this probllem. It did not really bother me then(car sat in the garage and even when I finally got the 406 under the hood it still sits in the garage) but now I want to fix it if possible.

Thanks,