2003 A4 1.8T,145,000 miles ,car sometimes runs good ,but then suddenly will start running very poorly, sputtering,vibrating inside car and sometimes hard jerking more so when under load ck engine light on

What is your question?

i replaced ignition coils,plugs,battery,air fiters also speed ometer stop working

What makes this problem better or worse?

worse when under load ,going up hill or exceleration

How long has your 2003 Audi A4 Quattro had this problem?

few months