Anyone have an idea how to force the ecm to divert air to the manifold at all times? I'm mainly looking for it to offset the 02 voltage so I can tune.

I'm running a cat w/out air, so I want to hard plumb the air pump to the manifold, but I know the ecm only compensates the 02 sensor reading when it diverts to the manifolds.

....and does this work in open loop ? Does the manifold divert actually subtract .100v from the reported 02 reading, or ??

-- Joe

 

Why not only disable the function in the Prom? then the 100mV will never be added.

if you want the 100mV offset you can change the O2 swing points.

 

Well what I want to do is ALWAYS run air to the manifolds, which will swing the 02 a little lean. I don't want that reported in the log, so I was hoping to enable the logic that compensates for that full time.

Keep in mind too, the car runs open loop full time, because closed loop just. don't work. The cam is too big, and I'm sick of playing with 02 constants to try and get it to play nice.

-- Joe