the "service engine soon light" came on a few hundred miles after i installed my cat-pipes. I did the reset (from techno square site) and it went off. But now after another few hundred miles it came back on.....is this normal?
any harm to the car?

i found a TSB here about reflashing the ECM for the earlier Zs, but even if i show this TSB to the dealer, they'll just kick me out because i have the cat-pipes....what should i do?

thanks

 

I haven't had it come on yet and it has been about 400 miles or so.