Hi, i have a 97 Audi a4 quttro 1.8t, having some issues. have about 8 codes come up P1127, P0300, P0301, 0302, P0303, P0304, P0455, P0137. the car runs rich and bogs alot especially when starting after it has ran for a minute it tends to start rough and usually die unless i give it some gas. i am assuming those codes go hand in hand with each other. i have replaced spark plugs, replaced 2 old coils, cleaned the MAF, and checked intake for leaks. At this point im sure what to do to solve this issue. Could it just be the O2 sensors?
1997 Audi A4 1.8T Quattro