minytrker
May 15th, 2007, 05:50 PM
I just tuned a camaro with a cam and bolt ons. I used COS#5 and it runs perfect in OL. As soon as I put in CLSD the car kept going real lean after the o2's cut on. While driving the car in OL the a/f was 14.6-14.7 when in CLSD it would go to 17-18 a/f. I kept going from CL to OL while driving with the scan tool and finally the o2's started working right it seemed and the a/f stayed around 14.7. I then went WOT and the a/f went up to 15 and I left out it. I tried on more time and same thing happened. I flashed it back to OL and went WOT and the a/f was 12.8 right where I had it when I did the tune. Any idea's Im lost. The o2 are brand new.