Quote:
Originally Posted by DEpointfive0
ANY tuning is considered "outside" the factory specs, because if the stock ECU notices anything it cannot correct by itself due to your mods, it will throw a CEL, kinda the reason behind a CEL...
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In the real world though, the ECU does correct some things itself regardless (see above, it will correct poor timing set by a dyno tuner). It probably won't correct bad A:F targets, although I don't know if anyone's tried that to be sure. Either way, the burden of proof is still technically on the manufacturer to show that you caused the problem. If the car has a defective camshaft from the factory that's going to snap after 10,000 miles, tuning the ECU doesn't change a thing about that really. Driving habits will cause a far larger variance.
Sure, Nissan has more lawyer-power than you do, but you also have the dealership on your side if you choose the right one. They're more interested in maintaining long-term customer relationships, and will spend the time to investigate what really caused the problem and whether they should push things in the direction of Nissan paying up or not. I haven't yet heard of a legitimate case (with any mfg) where ECU tuning caused someone to lose on the warranty when a mechanical manufacturing problem was clearly at fault. I'm sure if you dig around you might find a few, but you can find a few of anything on the internet, and those people just may not have understood how to work the system in their favor.