Thread: TunerCode Feature Suggestions and Feedback

There's a little more to narrow band vs. wide band closed loop control than just the reverse voltage John described. A WBO2 tells you how far the AFR is from the set point (which can be set to anything with WB), but a narrow band only tells you that the AFR is rich, 14.7, or lean. You can't tell how far the AFR is from 14.7, and that is the only available set point.

With a wide band, the voltage to AFR is linear and you can run a PID loop control system, which if programmed properly, can maintain an AFR set point quite closely.

With the narrow band, the ECU actually forces the AFR up and down (lean and rich) to keep it switching back and forth about the 14.7 point.

Cheers,
Dave

I was talking to another forum member and this came up. Having a fuel/spark cut for AFR leanout prevention. This would be helpful if your fuel pump fails, injectors fail, or battery voltage drops below a point that can power the fuel pump and injectors.

Feature: AFR Leanout Prevention
Description: Fuel/Ignition cut when leanout condition is found.
How should it be implemented: Wideband would have to be wired into the ECU and being monitored by the ECU. When your air to fuel ratios are leaner then a certain point, trigger the fuel/ignition cut.

This can be setup using Programmable Outputs in the new version of TunerCode. See #5 in This post.

Dave

would it be possible to get a bit of a rewrite of the tunercode instructions?

There are a number of items that i personally have no idea what they do. Such as ECT TPS ENrich factor... Ok, i can kinda understand what that says, but what does it do? Like if i had a car that had a odd issue while driving where it had a flat spot at certain odd times, how would editing this item help. Not being specific with just this item, just in general tuning using all of tunercode.

I found out by accident about the Alpha N flag and what that does, and im surprised this comes turned on in the stock tunercode bin?

The idle page/data in Nismotronic has a LOT of charts, i have never changed any but the base idle rpm, what advantages can there be to drivablility with editing these?

So yeah, not knocking any current features or how they are presentented, just thinking a update of the instruction sheet to describe the adjustable items better might be due now there is so many people using it.

Hi Dave Vadim and I were talking about this today, this is would really help alot when tuning.

Hm, i dont know, i guess you could have it so its on a target afr map, if it goes a certain amount out of range of the target value it cuts?

It comes turned on by default on Nissan ECU's. I know my B14 had it, and made it painful to tune out! At least the B13 ECU (non-TunerCode) lets you set the TPS voltage.

Will there be an option to lock out o2 sensors? I ask because with my current set up, i go though about 1 o2 sensor every 6 months because of my 2step and nitrous.

It would be awesome if we had launch control in OBD2's

Yes, you can disable the o2 sensor feedback and run without one with no ill effects as long as your car is tuned properly to run without it.