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Tune Very Inconsistent

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Old Jun 13, 2010 | 08:35 PM
  #76  
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Yeah, I can tomorrow morning....11:35 PM here.

Maybe have an idea what's wrong?
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Old Jun 13, 2010 | 08:53 PM
  #77  
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not yet..

i want to see if you hit the same load and same IPW for different pulls (same gear thou)

if you get a different AFR or see different loads then you know something is wrong
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Old Jun 13, 2010 | 09:24 PM
  #78  
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So you've scaled the Injector Scaling to a different value than stock, but have the stock MAF Scalings?

Maybe if you tuned your MAF instead of the injectors, it would work better.

Some of your posts seem to point towards having an incorrectly tuned MAF.

What ROM ID do you have?
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Old Jun 13, 2010 | 09:39 PM
  #79  
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I'm not really sure about the maf scaling....if I did that, then I wouldn't have to do injector scaling right?

My rom id is the newest one is 52680022.

I will do another 3rd gear pull tomorrow tephra.

What would I need to do to tune the maf scaling? That would require scaling the injectors down and then maf up right?
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Old Jun 14, 2010 | 06:23 AM
  #80  
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Yes, I'll pm you later when I have a bit more time.
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Old Jun 14, 2010 | 10:16 AM
  #81  
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Cool, thanks man
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Old Jun 15, 2010 | 12:59 PM
  #82  
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Update: So I'm still driving around with absolutely ZERO fuel trims. When I first turned the trims off, wot was in the mid 11's. Now after two days, it's in the mid-high 10's.

WTF.

One thing I have noticed is that when I first turn the car on, it idles pretty well at 14.7 or so. But once I go around and drive it for a little bit, the idle never returns to 14.7, it just stays at 13.5 or so. WTF, there's no trims? Why would it idle fine earlier in the same drive cycle, but then all of the sudden decide to not idle okay?

I have not tried the MAF scaling yet, but I guess I will soon. Just gonna have to rescale my injectors and latency which will suck

Anyone have any suggestions?
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Old Jun 15, 2010 | 06:07 PM
  #83  
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how did you disable the trims?
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Old Jun 15, 2010 | 11:06 PM
  #84  
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I set the Hertz in your LTFT disable code to as high as they can go and then I set all the values to 0 in all four of the open loop load tables.
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Old Jun 15, 2010 | 11:08 PM
  #85  
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ok

does your STFT stay on 0? that would mean the trims are disabled...

I don't think its a trim issue thou
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Old Jun 15, 2010 | 11:19 PM
  #86  
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Yeah the STFT is always 0. So now I know it's not the trims, I just wanted to eliminate that from the possible causes list.

Oh yeah, today it went back to mid 11's under WOT tonight.....was raining though.
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Old Jun 15, 2010 | 11:20 PM
  #87  
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well if its ECU related you should see different IPW numbers in the logs for a good pull vs bad pull..

did you have a chance to get 2x back to back 3rd gear pulls (with IPW) that had different AFR's?
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Old Jun 15, 2010 | 11:59 PM
  #88  
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No I havent.....it seems like they just want to change at random times. Maybe I should just log everywhere I go now lol.
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Old Jun 17, 2010 | 12:34 AM
  #89  
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May be it is something fuel preasure related?
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Old Jul 16, 2010 | 08:02 AM
  #90  
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Wait wait wait, you're telling me this is how this thread ended???


I'm having the exact same problem with my IX!!!

What i noticed is the the higher the boost, the more exaggerated the problem (i.e. the richer the afr's become)

Please see attached for logs over multiple PSI settings. I really need help with this
Attached Files
File Type: zip
July 1 2010 All Logs.zip (20.6 KB, 0 views)

Last edited by Carloverx; Jul 16, 2010 at 08:23 AM.
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