2015 Audi A3 2.0T Quattro. PO303 code #3 misfire. Engine shuttering and won't accelerate. So I changed out all of the coil and plugs. Still got a #3 misfire. So I switched the #1 and #3 and still same Misfire on #3. No matter what I switch it always goes back to #3 misfire. So I unplug each cylinder one at a time and the engine shudders worse when I unplug 1, 2, & 4 but stays the same when I unplug #3.
Any suggestions?

 

Do you have VCDS?...It is a must with Audi.......Check fuel injector?...Ground strap for coil 3?....