SynchroRev Issue Redlining When Not In Gear

40thfismo

I have a 2010 40th Anniversary. I have had full bolt on mods for a few years now and have never experienced an issue. I've decided to upgrade the exhaust to something different in the future and for fun I got QTP cutouts installed a few weeks ago alongside all new suspension (coilovers, control/camber/toe arms, etc.).

Ever since then, and I doubt it's related, I have been experiencing the car redline to 7,500 and hold it there for 3-5 seconds. This doesn't happen all the time, but when it does it's when I'm slowing down to a stop. I'll literally not be moving, in neutral, and the car is just sitting there at 7,500 rpms and I have to wait for it to die down because I'm not going to turn the car off or shift it in to a gear while it's like that. I can't find anything online about it, my techs at the Nissan store I work at have never heard of this, and I'm trying to see if anyone has any incite for me. Please help, thank you.