i am new to this forum so hello everybody

anyway my problem started like this i was having a hard time starting the car in cold mornings (well its not rely that cold here like 15-20c) after a vag-com scan if found my maf is not preforming at its best (3-35 kg/s) but no fault except this:



Address 01: Engine Labels: None
Control Module Part Number: 4B0 906 018 DB
Component and/or Version: 1.8L R4/5VT 0001
Software Coding: 11582
Work Shop Code: WSC 00027
Additional Info: WAUZZZ4B52N029316 AUZ5Z0A7010196
1 Fault Found:

17887 - Brake Boost Vacuum System: Mechanical Failure
P1479 - 35-00 - -

Readiness: 0010 1001

i checked brake vacuum pump it seem working and all the vacuum lines to it seems fine
i also ordered a new maf (original Bosch) after i replaced the maf the real trouble started well the engine making some strange noises does not ideal well its like jump from 700-1200 and it also dies some times and doesn't work well at all i replaced the old maf back but nothing changed
all problems continuous

sorry for the long post i just finished all my ides bank and doesn't know how to solve this problem
so any ides are welcome