Mamba Still On Top
People for years have been skeptical that AEM replaces boxes and claims "no fault found" and returns units. I too have had a "no fault found" box returned and it magically worked right again. In my instance, the method for determining the box had an issue was hot-swapping it with another unit to confirm the box itself was bad. Same firmware, same tune, just swap the box and the issue was there.I wonder if the cruising condition actually has anything to do with it or if that's just when odds are that you'll see it. Obviously you spend much more time at a cruising throttle than at WOT and even if it was under WOT, I'd tend to think you'd blame a WOT stumble on the tune or something else. Reason I mention it is because if it's a stumble that happens anytime than I'm sure AEM cares about it. However if it's a stumble that happens just while cruising, than they likely don't. In browsing their tech support forum, I've seen them say many times "the Infinity is designed for motorsports use, not for street driving". In other words they will likely dedicate precisely zero resources to fixing this until it affects "motorsports" based customers.
Not trying to start a conspiracy here but AEM support comes across a little fishy sometimes. I have serious doubts that the defective ECU that I sent back to AEM for repairs is the same ECU I got back. I sent away a brand new 506 box that was in flawless condition and received back one that looked like it had been used for years and was covered in grinder marks, yet the serial number remained the same. Despite them claiming that nothing was wrong with my ecu, once I got it back my problems were magically gone. I've talked to 2 other people now who have reported nearly identical interactions with AEM. Point is when they say "we've never seen this before", I don't really believe them...
By doing this, maybe they feel it helps to prevent consumers in tight knit car communities from claiming them unreliable. A perception ploy.