iskate2

So I'm getting some tuning done on the ITB CRX and everything is looking peachy so far, but my data is being played back to me in a funny way...

the values below were logged during partial throttle pulls around 1% to 40%, but they play back out here in the 30% to 100% range. Is there something Im being an idiot about? or is this a legit concern?

Thanks

92TypeR

What does the log of TPS% say?

In live data view, is TPS 0% when throttle is closed, or 100%?

Is it a factory Honda TPS sensor? Did you calibrate the TPS sensor?

Make sure the MAP and TPS sensor plugs are not switched.

Gunmetal_B20_Hatch

iTrader: (9)

Are you using the Honda TPS?

May need to enter a different voltage range

iskate2

Stock TPS

Calibration is perfect.

In live data view, while logging and recording, everything looks normal. Only the playback is like this.

92TypeR

Try rebuilding the map. Reselect sensors and re-calibrate the TPS.

Does S-Manager allow for blended maps, ie: first 8 columns manifold pressure, last 8 columns TPS%? The ITB'd B-series I tuned before all had better part-throttle drivability with blended maps versus Alpha-N.

If the problem still persists, sounds like a look-up value issue in the code for overlay, since live data view is accurate.

iskate2

It seems that I can have my primary map TPS based and my secondary map pressure based or vise versa- so you would suggest trying this? my vacuum falls right off to zero after I touch the throttle, so it would see wide open during a lot of partial throttle times, wouldn't it?

92TypeR

For about the first 15-25% of TPS%, you should have partial vauum. After about 25% TPS%, you are near or at atmospheric pressure.

For ITB tune, I usually have vacuum from 150mbar to XXXmbar (usually around 400mbar), then TPS after. The transition (from XXXmbar to XX% TPS) is determined from data logs. Start a data log, very slowly tip-in to the throttle, maybe 1-2% every second. You can shut it down by about 50% TPS% since you are almost guaranteed to be at ATM pressure by that point.

Review the datalog and plot MAP vs TPS. When you see MAP start dropping fast to ATM pressure, look at what TPS% that is. Those are your transition points.

You will want a column every 50mbar.