warp10

iTrader: (5)

I'm tuning my VE tables and I wanted to see the difference between tuning with STFT's and tuning with the wideband.

Once I got the STFT's around the 0% to +/-2% error margins, I checked my wideband and it is hanging between -2% to -5% AFR error. (Nothing in the +%)

Is it normal? Is my wideband out of wack? Maybe I'm using the wrong formula in HPT?

Using LC1 WB and I just recalibrated it in case it was an issue.

I'm using [[PID.2811]/.625]+10] in HPT.

Edit: LC1 is programmed with 0V=10AFR and 5V=18AFR

16floz470ml

iTrader: (2)

-2% to -5% is perfect. That is exactly what you want. I also have the lc1 and you cannot get the calibration exactly perfect. It sounds like you are pretty close though. Any thing around -5% and you are right on. Use the wideband only and tune everything with it.

YellowToy/A

iTrader: (1)

Fuel trims only work in closed loop. What is the error of commanded to actual air/fuel ratio? In closed loop the a/r will move about the commanded a/f as the fuel trims do there job.

warp10

iTrader: (5)

THX

Yep, I was in closed loop with LTFT disabled to do the VE tuning with the narrow band.

The AFR error from the wideband is commanded VS actual.