one problem after another!!

[Jay-a3]

first my eml came on so had it sacnned and it was maf, so i changed the sensor and the light went out,,sound. im now having trouble with code 17705 !loss of pressure between turbo and trottle, ive checked all that i can and carnt see any leaks. now sometimes when i start my engine for the first time it takes about 5 minuets for the engine to clear itself and is impossible to drive!!
anybody advise me on whats goin on with my car