Ok, I've just got my short block replaced in the 3.8 by a local mechanic, and now the check engine light is constantly on. The guy said is normal for it, and said it will stop ones the computer gets used to the new engine. That sounded kinda cheesy to me. He said he will put it on the computer in a couple of weeks to see whats up. Is this usual after the repair? If you know, let me know. Thanks and peace.