My Audi will not pass RI Emissions testing!!
I installed a new Catalyc(sp.?) Converter and new O2 Sensor. It passed 3 out of 4 gases flawlessly except for NOX. Does anybody have any idea what else I could fix. It is an 86 5K CS

i have the same exact dilemna , i hope somebody comes forward with some advise .i have til may 1 st to get this thing to pass nos on maryland emissions!!! please help!!!!!!!