Is there a guide or faq on how to tune a aem ems? thanks

 

Not really. If you go to aempower.com and go to the electronic forums there is a lot of information there. As always, use the search feature. Don't be put-off by the gruffness of some of the guys on there, they answered the same questions or variations of them multiple times. One guy was starting a faq, another guy has the beginning of one on a website that you'll find on the 3000 GT section, and I've replied a few times on idle and starting issues. Those would be good starting places.