Found a new M box ecu with a APR Stage 2 on eBay that I could not pass... plus the seller was very cool. I just installed it today and so far no problems. The power is much more linear and predictable than my previous MTM tuned ecu. The MTM does feel like it was tuned with much more low end torque and peaking around 18psi and then coming down to 13-15psi. The APR peaks at 15-17psi and then hold that psi. All in all the APR just feel smoother, not really faster. I know a lot of people say the APR tunes are very conservative, oh well.
So why did I get a new ecu? I always felt like my MPG went way down since I got the MTM tune ecu switching from my organically APR tuned ecu. Not to mention I liked how with the APR I could switch to "stock" mode if I know someone else would be driving my car or I want the best MPGs possible. All in all, this is just an expensive test to see if I'm right about better MPGs. The up side with the APR tune is that my Check Engine light now works again. I believe whoever did the MTM tune coded out the CEL. Also, this Stage 2 APR tune codes out the rear O2's so I won't be seeing those errors anymore.
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