Quote:
Originally Posted by JvKintheUSA
Modshack - were you able to get the A/F code working on your Scangauge? If so, could you possibly test your A/F ratio at WOT?
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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..
