Commanded vs. Actual afr

[hollas13]

How close is the commanded afr readings from actual readings? Commanded afr is just what the computer is trying to get to correct?

[97AutoXVette]

How close is the commanded afr readings from actual readings? Commanded afr is just what the computer is trying to get to correct?

Correct.. For my car with my mods, it is almost spot on. As you continue to change more of the engine however, supposedly commanded vs. actual can deviate more and more.. I have heard stories from friends/coworkers who tune and see numbers on their wideband that differ from their commanded.

What are your current mods?

[hollas13]

3.4mps, 1.9 rockers, headers and canned tuned. Plus with your basic 180*tstat 103's, diy intake and cat back. im commanding 10.8:1 wot

[Fivefingerdeathpunch]

I command 11.2 then down to 10.8ish as rpms rise. But I tend to see 11 down to 10.3 with my AEM wideband.