I have a 2003 a4 1.8 turbo i am having some difficult time trying to figure this out When you turn the car on it start to shake and sounds like its misfireing it drives fine as long as your driving but if you hit a stop light or sign it starts sputtering again the i have changed the plugs the ignition coils the ck valve also both oxygen sensor anybody out there with any advice

 

Do you have a check engine light? Have you scanned the ECU for fault codes? You need to do so and post any codes here to help with the diagnosis.