sergiolib

Hey guys, I just bought a turbo civic, D15B and when i bought it and drove it, it was sound. Now im starting to realize when i start it, the engine kinda revs high and the idle bounces between, 2-2.25. When my turbo timer kicks in after a drive, the car does the exact same but at A LOWER RPM level. When i go to the back ok the, i can hear the exhast giving shots as the car idle bounces... can any one help me with my issue...? What is happening to make the iddle jump and the exhaust shot out, and how can i fix it? Thatnks for all the help! Cheers