Chevy blazer idles very high

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. The high idle and the pop noise from your Blazer could indicate a problem with the Mass Air Flow (MAF) sensor, as the P0101 code relates to it. The MAF sensor measures the amount of air entering the engine, and if it's damaged or malfunctioning, it can cause erratic engine behavior, such as high idling. The pop might have been from a hose or vacuum line coming loose or a backfire due to an air-fuel mixture issue. I'd recommend checking the MAF sensor and inspecting your engine and connected systems for vacuum leaks. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!