Ok, when first started, engine runs at 1500 RPM. Takes about 30 seconds to a minute to drop to 800-1000. After it is completely warmed up, RPM's drop to around 250-300 RPMs. I'm no genius, but I can tell that this is not right. With my old ECU, I had turned up the idle with the idle screw. Once I got the new ECU I forgot to turn it back down. I just turned it all the way back. Keeping in mind, this was done today, yesterday I ran my codes and there were none. Also, the car doesn't like to start as soon as it should. And once again, there are no codes.