ok so i replaced the broken parts that were possible causes for my sputter (ect, Fuel sending unit). in the process of replacing ect i broke my breather hose, it had a bunch of **** in it to the point it was half full just wondering if this is more than likely the cause or not if it continues to sputter after this its time to start replacing more expensive parts. im figuring coil packs next if breather hose is not the problem. had two cel codes but both have since cleared by themselves p1550 and p1600

1999 audi a4 quattro 2.8l 30v

 

What kind of sputtering is it? like a misfire sputter? or an unsteady idle?