How do I fix these trouble codes? $1,600 max for parts and labor

[lilmoose21]

Hey All,

I have had a check engine light for quite some time, and now finally have the opportunity to do something about them. I have $1,600 at my disposal if need be, but I'm not sure what I actually need to replace to fix these issues. I got my car scanned at AutoZone today and they are as follows:

16684 - P0300 - Random/Multiple Cylinder Misfire Detected
17521 - P1113 - Bank1-Sensor1 Internal Resistance too High
17947 - P1539 - Clutch Vacuum Vent Valve Switch Incorrect signal

While driving, the only issue I have is that boost builds and then when I hit around 3,200 rpm I seem to lose all boost and power. I can't floor it past 3 grand or it won't accelerate at all because it hesitates so bad.

So far, I'm planning to buy:
New MAF
New Spark plugs
New air filter
New APR R1 DVs
Samco TBB
Samco F-Hose

Any input is greatly appreciated

[Audiquattro337]

take it to a dealer and have it diagnosed correctly, will save you money in the end instead of throwing the old "tune up" bag of parts at it. just my honest opinion...