Hey guys I need some help on my way to work eerything was good until I got to a red light and the car stared to shake like a misfire type of dea it would stumble on acceleration and I got this CEL codes P0305, po442,po431 please guys tell me wht can I do to fix it and how much would it be or if is the car a lost hope

 

p0305, cyl 5 misfire detected
p0442,evap emiss control sys (small leak) leak detected
p0431, not available

 

duplicated ...

 

(1) Start by cleaning the MAF sensor ... search CRC Mass Air Flow sensor cleaner.
MAF controls the air/fuel portion, a bad MAF will crew them up.

(2) If it did improve, check the TPS - throttle position sensor
* unstable idle
* erratic transmission shifts in city driving, sometimes quite hard
* occasional stall when coming to a stop or shifting to 'drive' or 'park'
http://www.buzzle.com/articles/sympt...on-sensor.html

(3) Don't know if Audi has IAC
Bad IAC (idle air control), will cause unstable idle, difficult starting, and stalling