flowride

I have a concern. My 98 Camaro Z28 convertible has intermittent starting problems. The dealer (Ferman Chevy in Brandon, FL) was able to duplicate the problem ONCE. They said it was a bad Computer Command Module or something like that. They replaced it, but the car has since started to repeat this problem and I'm sick of taking it to a dealer that can't seem to fix it. I've taken it to them like 5 freaking times! It's really ticking me off because my warranty expires in September. First of all, has anyone ever had this problem, and second, does anyone know a good mechanic who can address it? Thanks!