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Any further thoughts on this subject?

No worries, I'm not great at explaining things. But, basically - you use STFTs to tune fueling adjustments pre-PE and then the wideband for PE adjustments.

That blip you see there is your shift torque management. You can disable it if you want, but your trans won't last long...

At normal part throttle driving yes, which is why you can use STFTs to adjust the MAF. But once you hit PE, typically 3,500 to 4,000 rpms and based on throttle position, lambda should be commanded to...

Update:

After increasing my idle to 850rpms and putting over 50 miles driving around without making any other adjustments, it appears my idle has been improving. I'm not sure how long the idle...

1) Re-enable your MAF and your O2's and ensure your STFTs are enabled, but disable your LTFTs. Take your stock MAF Curve and add 10-15% on the whole thing. Write the tune to vehicle.

2) Ensure...

Not trying to hijack this thread, but thought I would post up a couple log of my Bank 2 reading rich at idle while also having my STFT's between bank 1 and bank 2 locked together, instead of pulling...

Grab one off the hptuner repository.

Tried the Idle Relearn Procedure - still have the funky idle. Its hard to tell if it is better though - i'd like to think it is, but i'm still getting wild swings in my idle spark timing that comes...

Couple more logs for everyone to look at.

The issue is coming on pretty intermittently as you can see in both short logs. When coming to a stop it'll idle really rough, bouncing around and you'll...

Make sure to include the LTFTs in your log as well as the STFTs. Do you have a wideband installed? Include that too.

Does this happen only at idle or also while driving?

Do you have LTFTs enabled?

I have the exact same issue. I've replaced the sensor on the bank that is reading richer than the other (one is switching one reads in the 750's ish) when at idle. The new sensor didn't change...

Oh good point, I missed that part of his post.

Tuner probably needs to add fueling at idle to get the trims down.

Great question. I have the same feature as well, one bank is reading leaner than the other at idle. Once I'm part throttle driving they read the same. It could be an exhaust leak near the O2...

Hello Everyone,

I'm having a strange idle problem after I made some minor adjustments to idle tuning. After uploading the slight adjustments, car ran fine but then the car seemed to have a power...

Do you mean you reduced the Virtual Torque in your idle area?

Anyone? Anyone have a stock ZL1 file with the FSCM? None of the tunes on the HP repository seem to include it. Or else, does anyone know where to source settings to update when replacing the...

I?m having trouble getting the HPTuner repository working and need a stock ZL1 file with the fscm. I?m swapping out my lowside pump with an LT4 and would like to program my FSCM with the LT4...

You can’t turn it off. Many have tried and its likely a setting we don't have access to. Other tuners have said that this happens when rear O2’s are disabled so is probably some fueling catalytic...

There are no settings that will keep it from unlocking when downshifting. The only thing I’d suggest is up your commanded pressures at wot so the converter will lock back up quickly with as little...

I’d describe it as more of a bandaid than a fix. We definitely are missing some tables.

Intried those settings and it has made the rich condition better by entering DFCO more often, but it had no effect on my STFT’s spiking to +32%.

Attached is an example of the bogging on launch. When dumping the clutch at 4800 rpms, the motor would bog down to around 2300 rpms pretty consistently. I did not capture a log with the change as...

I have my LTFT disabled and my STFT?s still shoot up to 32% during decel when DFCO is not active. E92 pcm, i dunno what the solution is other than to have DFCO on at all times during no throttle.