I just swapped a new 3v into my 05. The old one didn't have any major modifications and it just has a Borla exhaust, Bama tuner, and cold air. You're basic stuff to get you the 200 extra hp you want... Anyway, I got the swap done and everything seems to be in order. The engine is running lean though and when the tune is put back in stock, it starts and dies. In a 93 octane tune, it runs and drives but it stutters like it's lean. I checked the engine light and it does confirm that it's lean. This light isn't on all the time even when it stutters. Everything like the injectors seems to be working properly, they did operate perfectly before the swap, and I changed my gaskets out. My experience on anything newer than a foxbody is extremely limited and I'm looking for any ideas.