Air fuel code for scangauge

Modshack

Yeah...Just went out for a run and it's working. As I and Jordo have pointed out, I think you have a problem...

With my Long term trims at 0%, and the scangauge set to show open loop/closed loop transition, and Sensor 1, Bank 1 selected I am getting the following:

Closed loop: Normal 14.1-14.7 reading

Open loop: 12.0:1 to 13.2:1 at the point it transitions to open loop. Numbers seem to depend on gear and RPM's when I go WOT. These are numbers I would expect.

My current tune: stock Airboxes and a Stillen Exhaust. It is my understanding that the front 02's are 0-5V. Wideband sensors so this should be pretty accurate..

Since this ratio is fixed, and not manipulated by 02's or MAF's at WOT, you may have a correctable problem. I would check for any Vac leaks, particularly where the PCV hoses connect to the post MAF tube. You've had these in and out so there may be something loose.

The other variable is your HFC's.....though Dyno runs have not shown these to run particularly different from stock.

Check to see that you've programmed for sensor 1 on either bank 1 or 2. These are the front 02 sensors and the ones that most accurately measure A/F ratioos.

Good luck tracking this down. In the interim, I'd stay out of WOT operation..

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