Having stalling issues. Car is a 03 350z 6 speed manual. No engine mods besides a intake. Runs great and shifts great but when I'm above 3200-3500 rpm's and I push the clutch in to coast the car will die silently. It starts back up instantly and I can continue driving at whatever speed I just lost my power steering at I've yet to find someone who actually fixed the problem. The only codes I have are for the knock sensor (gonna fix the common wiring issue) and I also have a VERY slight misfire during idle but it revs perfectly fine and no misfire while driving and I've also done a pedal dance reset. Here recently I started hearing a high pitched quiet tone coming from under the hood that kinda increases with rpm (doesn't sound like belt squeak). Any help is appreciated!