2001 Turbo Lexus IS300

Hi, looking to sell my turbo is300. Car was built and tuned by Tony at Dyna Motorsports. Car made 334whp and 290 ftlbs of torque. Car ran and drove perfectly until I took it out this weekend from storage and for some reason it is idling high and shuts off randomly after full throttle. I had plans to sell it this summer anyways but unfortunately due to the issue I put it at quite a low price and am still looking to sell it. BUILD LIST: Stock Motor (#2JZGEvvti) Tubular Turbo Manifold #HolsetHX35 #Tial Wastegate with Dumptube 3" Downpipe & Exhaust Test Pipe Front Facing Intake Manifold GTE Throttlebody Precision FMIC with Custom Piping HKS SSQV #SRT4 Injectors #Walbro 255LPH Fuel Pump Fuel Return System Aftermarket FPR Custom Fittings and Lines Moroso Catchcan #GReddy E-Manage Ultimate Power Steering Reservoir Relocation Custom Power Steering Lines ECU Relocation with Custom Bracket ABS Relocation Mishimoto Dual Slim Electric Fans Stock 5-speed Automatic Maintenance Summer 2023: Spark plugs Coil wires injectors Dneso starter Coolant drain and fill Vvti solenoid Pcv valve replacement I unfortunately don't have the time left to look into it and hopefully someone with good know-how can fix and enjoy the car. It still runs and drives just rpm is high around 1500. Paint is also not in the greatest shape but the chassis is super clean no rust. Original rockers as well. May consider trades but mainly looking to sell.