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Old 09-12-2020, 04:34 PM   #1
Drake_93
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PI ratio issues with ecutek and FI

I don't want to discuss how I ended up in this situation but I now find myself with a stock flashed ECU and a boosted car. I know most tuning principles and could likely get away with recalibrating an NA car decently well. Currently, the car runs, I've rescaled MAF, MAP, load tables etc, however as I approach .7g/r load the ECU flips the PI ratio to 100%.

Wouldn't be too bad if it weren't for the PI having a really really hard time responding in any timely fashion. (I have the afr and timing maps set conservatively, and have been just testing the car by putting around in an empty car lot). When the PI switches on, I'm seeing AFRs go absolutely insane, maxing at 20:1, and the STFT can get it to correct, but the PI will trend rich way past the target as well.

So I'm having 2 issues, PI ratio isn't fading in at 35% as intended by the cold/warm/hot maps, and the PI injectors overall seem super sluggish.

As for DI, they seem to be okay (5-7% LTFT).
I'm wondering if there's some sort of DI minimum that I'm not hitting at .7g, or if the requested pulse width is too high?, I'm at a loss.

PS: I have a base map/proper tune coming from xero limit... But I do want to learn what's going on here
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Old 09-12-2020, 08:39 PM   #2
Drake_93
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So, I should have added some info. I was running RRv10, I don't have any newer versions for some reason. and I was on ZA1JA01C. Issue in the logs I noticed is the Fuel system status was ALWAYS 0. this seems to be one of the known bugs with the USDM ROMS from v10 and v11... after looking through some of the posts that linked back to this. So, I ran back ROM RRv9.1, and wiped the MAF scaling back to stock and I'm now able to get up close to 1.2g/rev before the car starts to trail off. I think I might be missing a bit of scaling on the PI side to get through that jump but... progress is progress, and I hope this helps anyone else that might be having the issue.
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Old 09-13-2020, 05:34 PM   #3
tomm.brz
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IT'S THe rr10 bugged as hell
email ecutek support and ask for racerom 12 patches
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