Some full disclosure... I tune a lot of motorcycles, so I'm not completely ignorant to the principles, however, this is my first toy car, and I couldn't be more clueless in regard to Miata tuning. So much so, that while doing extensive search on the forums, the lingo is way over my head, so sadly it's not been much help.
The car is a 40k mile cherry 04 MSM I bought off a retired gent. I added FM intake, exhaust, boost controller, and intercooler. At that point, I was done looking for performance, but the OE computer fueled really irregular, so I went with the Mega Squirt from Rev. and RX8 injectors. (side note: he was a pleasure to deal with, offering very timely support). I did a lot of local research, and all the great feedback led to one tuner, so I took the car there last week. Now.....
- It's still hard to start cold. Is this the nature of an aftermarket computer?
- AFRs look nice and safe under spirited driving, but run 15-15.5/1 under light cruising loads. Is that optimal? Is it even safe?
- The tuner said for some reason the AEM gauge isn't sending signal to the computer for trim. That was a plug and play connection. Perhaps I have to enable it via the laptop? I'm also guessing that may cure some of my lean AFR readings?
Other than the hard cold start, the car runs and pulls well. I just want to make sure I'm taking care of it and have it optimized, as it's a weekend mountain toy for me and the wife, and hopefully will be for years to come... Thanks to any of you willing to overlook my ignorance and offer solid advise.