my o2 sensor output is .800mv, my air pump ios sucking air, does this mean my ACV isnt dumping port air? Can anyone with a s4 car with airpump and a functioning ACV that has passed emmisions please tell me what there o2 sensor reads at idle?

 

you mean .8v ? .8mv is like 0

my car with no air pump and acv is 0.8v and with it was 0.1-0.2 so my guess is your acv isn't working like you said.

 

opps, yeah .8v sorry, yeah, i thought so, thax