Mine from 4wheel parts was a superchips pulsar it did what you are saying exactly crank no start. Called edge up directly and they sent me one over night and all was amazing. Superchips said I installed it wrong. I was like your stupid it's stupid easy.
I have pulsar newest version its awesome. Performance mode is quick with 37s . But I also have 4.88 gears the first one sent to me. Was a version one it had bugs. They sent me a new one directly from factory. It's way awesome.
I don't think it would void the warranty at all it's just a piggy back really you unplug it goes fully to stock. It's really neat. Just be careful with the pcm when pulled out. It's an awesome upgrade
I would say it deff has throttle response I would say yes it's really cool gas got better that's really what I wanted, well gear ratio and tire size too. I still want a taser to add the front camera