V1 Strange Idle Issue

[finazzoty]

Not sure I'll be able to open it, but can you post your tune?

Yessir here it is

 

[Gtstorey]

I don't open video file links at work, but the manual indicates that it won't read above 20:1 AFR. Anything higher such as when the car isn't running should show 4 dashes. Any chance its displaying one of the text messages listed in the manual?

 

[Rauq]

I've not yet made the jump to E85, but... try changing Stoich to 10, save, flash, and start her up and report back.

I've been wondering if creating a baseline E85 tune is this easy, and from everything I've read, the answer is definitely maybe. Not a lot of P12 support out there. But I'm comparing your tune to another that I believe was a ZZP E85 tune and they changed that value there.

I also don't see that they used a Flow Rate Mult vs. Volts multiplier, but I think they can accommodate for that by VE and MAF scaling which isn't super apparent to someone like me whose tune is so different. Disregard for the moment, though, that was more my musing than anything else.

 

[Rauq]

I don't open video file links at work, but the manual indicates that it won't read above 20:1 AFR. Anything higher such as when the car isn't running should show 4 dashes. Any chance its displaying one of the text messages listed in the manual?

I was thinking the same, but the dial LED being all the way over at the lean side makes me think that 29 might actually be the real AFR. My thinking was, my wideband never shows a reading that high, but my engine also never runs that lean, because if it's significantly higher than 16, it's in DFCO and shows that "----" reading. It shouldn't ever be running at 28:1 AFR, but here we are.

 

[Sluggonaut]

I've not yet made the jump to E85, but... try changing Stoich to 10, save, flash, and start her up and report back.

I've been wondering if creating a baseline E85 tune is this easy, and from everything I've read, the answer is definitely maybe. Not a lot of P12 support out there. But I'm comparing your tune to another that I believe was a ZZP E85 tune and they changed that value there.

I have an E85 tune form Al @ ZZP and stoich is set to 14.70.

 

[finazzoty]

I've not yet made the jump to E85, but... try changing Stoich to 10, save, flash, and start her up and report back.

I've been wondering if creating a baseline E85 tune is this easy, and from everything I've read, the answer is definitely maybe. Not a lot of P12 support out there. But I'm comparing your tune to another that I believe was a ZZP E85 tune and they changed that value there.

They changed the Stoich AFR to 10?

I also don't see that they used a Flow Rate Mult vs. Volts multiplier, but I think they can accommodate for that by VE and MAF scaling which isn't super apparent to someone like me whose tune is so different. Disregard for the moment, though, that was more my musing than anything else.

View attachment 41942

 

[Gtstorey]

I don't think it will run at all as lean as that. It's an error of some sort. Check the voltage at the white/brown analog output wires with a voltmeter.

 

[Gtstorey]

 

[Rauq]

Is your wideband after the cat? And/or after a flex? That won't work...

Feel free to scratch the stoich idea. Just a thought.

 

[Gtstorey]

Some of the experienced tuners on HPT say that the wideband will work after a cat. The tailpipe sniffers are after a cat if the vehicle has one.

 

[finazzoty]

Is your wideband after the cat? And/or after a flex? That won't work...

Feel free to scratch the stoich idea. Just a thought.

Nope it’s before the cat, but after the flex. It’s the ZZP down pipe that comes with their entry level turbo kit though and has a designated bung specifically for a wideband

 

[finazzoty]

Figured out how to correctly get power to the gauge - ended up using the ABS2 fuse on the fuseblock. @Rauq I'm now looking at getting the HP Tuners portion of this finished up. In regards to your maths parameters...are these (shown below) universal for all of us?

Don't quite understand where these are coming from. Can you explain?

Also, what would be the parameters needed for the "Wideband AFR Error?"

 

[Sluggonaut]

If your UEGO is the 30-0300, you can reference page 10 of the instructions for the math piece. So it would be more like ([7101.10]*2.3750)+7.3125

 

[Rauq]

Wideband error is what you'll actually log in your MAF or VE correction table. Once again, sub the *2+10 for whatever values your wideband gauge output. For my gauge, it's voltage *2 + 10, for yours I guess is *2.3750+7.3125. That is, if the voltage is 2.5v, for me that would calculate out to 2.5*2=5, +10=15 AFR. 2.5v for you would calculate out to 2.5*2.375=5.9375, +7.3125=13.125 AFR.

Wideband error is a percentage, 100* (actual AFR - commanded AFR) / commanded AFR. So if you're commanding 12 AFR and the wideband is reading 11, your error is 100*(11-12)/12= -8.3%. You will then use that value in your MAF or VE table to correct your fueling by taking 8.3% fuel out of that point in the map.

I have to say, though, there are better resources to walk through this stuff than my ramblings. I can help point you in the right direction, but I'd intended to walk through setting up a wideband in a Goblin rather than providing a tuning resource.

Below are a few good LSJ resources

https://dfkitcar.com/forum/index.php?threads/sc-tune-guide-1-hptuners-goblin-basic-settings.2628/

[SC TUNE GUIDE #2] HPTuners; Using Templates

The purpose of this thread is to show you how to use a template in HP Tuners. This function allows you to apply a specific set of changes to your tune time and time again without worry of forgetting one here or there. Let me explain a bit more, in order to prepare for tuning, you have to make...

dfkitcar.com

https://www.redlineforums.com/threads/maf-ve-tuning.40891/