Part Throttle is too rich A/F = 9.9-10.2

alblude · Post by **alblude** » Sat Oct 01, 2005 2:15 am

When I had it tuned at DynoSpotRacing at full throttle the mixture was REAL lean so we brought that down in 4 runs to acceptable levels. But it seems that part throttle is rich as hell at 9.9 - 10.2. I don't have the .bin files, I guess I'll ask for them, but is there something I can do in the mean while?

Post by **Spunkster** » Mon Oct 03, 2005 9:52 am

temporary fix would be to try and turn down the fuel pressure, but then it will lean out at full throttle.

You need to take it back to the tuner and have some part throttle tuning done.

alblude · Post by **alblude** » Mon Oct 03, 2005 3:31 pm

Spunkster wrote:temporary fix would be to try and turn down the fuel pressure, but then it will lean out at full throttle.

You need to take it back to the tuner and have some part throttle tuning done.

I guess I neglected to mention I'm not using a Wideband. I'm just getting this from my O2 sensor. I called my tuner today and he said that is not accurate. Could the accuracy be that bad at part throttle?

Post by **Spunkster** » Mon Oct 03, 2005 3:31 pm

Impossible to say without a wideband reading.

turbosi92 · Post by **turbosi92** » Tue Oct 04, 2005 5:59 am

alblude wrote:
Spunkster wrote:temporary fix would be to try and turn down the fuel pressure, but then it will lean out at full throttle.

You need to take it back to the tuner and have some part throttle tuning done.
I guess I neglected to mention I'm not using a Wideband. I'm just getting this from my O2 sensor. I called my tuner today and he said that is not accurate. Could the accuracy be that bad at part throttle?

Yes, without a wideband tuning won't accurately happen. Case closed.

EGHATCH · Post by **EGHATCH** » Fri Oct 07, 2005 12:27 am

its almost impossible to run 9s and 10s at part throttle especially at idle. most likely engine will stall and you smoke will be everywhere. go back to your tuner

alblude · Post by **alblude** » Fri Oct 07, 2005 3:58 pm

well a couple of things I guess. Most importantly it wasn't a wideband, second, that reading was from PalmLog 1.0.4. The reading from HondaLogger was anywhere between 8.9 and 12. so clearly they're whacked and definitely need to be disregarded. On that note, I'm wondering what the accuracy of Palm log will be when I DO install the wideband.