STFT still regestering in Open loop is this correct

[robertearl]

2000 Corvette

I am trying to tune via Wideband and have disabled LTFT and STFT. When logging I notice that all of the LTFTs are 0 as I would expect. The STFTs are still regestering even though I have them disabled.

Is this correct? Are they still effecting the fueling or are they ignored since I have them disabled.

If they should be 0 also, what else do I need to do other than to disabled them???


Reb

[Russ K]

Set the closed loop enable temp to 280*F, and make sure that the STFT open loop is set to disable.

Russ Kemp

[robertearl]

I did. Both of those are set.

Reb

[Russ K]

Post your tune & scan log showing the STFT's not staying at 0.

Russ Kemp

[LinearX]

I'm not sure if you've cleared the learned fuel trims or not, but that's something else you may need to do as I think the ECM will remember them even if you've got them disabled.

[robertearl]

When I try and upload the hpt and hpl files, it just hangs. I can upload the cfg file. I checked and they are less than 400kb. Is anyone else having this problem????


Reb

[robertearl]

Found it. I had forgotten to set the closed loop enable temps to 250.


Reb