Hey guys,
I've been tuning my truck and I did some data logging. At WOT, I had my target a/f ratio at 12.1:1, my actual a/f ratio was 11.25:1. So that would mean that I need to take some fuel out, but the thing is the O2 correction% was a 10.5. Doesn't it add fuel w/ the positive numbers in the O2 correction?
I did the test all in 2nd gear, no shifting, and this was after the initial stab of the throttle, so accerleration enrichment shouldn't have been added.
Also, another quick question. No matter how little, or how much fuel I give it, it backfires under de-accelration right around 2000rpm. It only does it when I'm in nuetral and rev it up fast and let off. Could this be a timing problem? The timing is at 32* when it's making the backfire.
Thanks a million.
I've been tuning my truck and I did some data logging. At WOT, I had my target a/f ratio at 12.1:1, my actual a/f ratio was 11.25:1. So that would mean that I need to take some fuel out, but the thing is the O2 correction% was a 10.5. Doesn't it add fuel w/ the positive numbers in the O2 correction?
I did the test all in 2nd gear, no shifting, and this was after the initial stab of the throttle, so accerleration enrichment shouldn't have been added.
Also, another quick question. No matter how little, or how much fuel I give it, it backfires under de-accelration right around 2000rpm. It only does it when I'm in nuetral and rev it up fast and let off. Could this be a timing problem? The timing is at 32* when it's making the backfire.
Thanks a million.
