i just got my h23 lude ..ok so it runs prefect wen its cold ..once its been on for about 15 minutes the rpm gets stuck in 2000 for about a second untill i give it alot of gas for it to go up..also my coolant is boiling n theres alot of pressure inside the radiator hose n the reservoir tank...anybody have any ideas as to how these problems are related n how they can be fixed...