PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

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Old Jan 11, 2013 | 12:58 AM
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I have a 2 bar tune on my car and wot at 5k with goes way rich and even when I shift and get back on it it stays rich. I have to wait a little bit then it will run right... Any ideas why it would do this?
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Old Jan 11, 2013 | 01:00 AM
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It's a 97 camaro with a 383 small cam and v7 ysi, 60# injectors twin intank 255 pumps.
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Old Jan 11, 2013 | 07:15 AM
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Post the tune and a data log????
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Old Jan 11, 2013 | 12:55 PM
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the log is with HP tuners and the tune is with Jet DST/tunercats. I cant get the tune to attach... I can email it to you
Attached Files
File Type: hpl
2 bar scan lt1.hpl (71.5 KB, 44 views)
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Old Jan 11, 2013 | 01:25 PM
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I would wonder about COT, which is a persistent
enrichment mode that gets triggered when you go
to high RPM & load.

The log file is not evidently anything to do with the
stated problem, it looks like an idle log. Now there,
I see STFT creep driving wideband AFR down below
stoich, indicating a narrowband sensor issue to me.
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Old Jan 11, 2013 | 02:15 PM
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Yeah, you cannot leave COT enabled or it will make WOT very rich to reduce exhaust temperatures. JB is probabbly correct!
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Old Jan 11, 2013 | 02:26 PM
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Ok what is COT? What's it stand for because I have to find it in jet dst.... Remember I have an ol LT1. My stft are disabled as of now while I'm working on my ve table. In that log there is a wot pull then I shift just past 5k and get back on it a little in 5th gear to show how rich it is
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Old Jan 11, 2013 | 03:14 PM
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This is an lt1? Did it ever work right and then all the sudden change?
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Old Jan 11, 2013 | 03:34 PM
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No I'm just doing the tune for the first time now and something is making it get really rich past 5k. If you have HP timers I attached a log with a pull that shows it happening.
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Old Jan 11, 2013 | 10:57 PM
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If I put it in 4th gear and go wot at 2500 it will pull hard till 5k then go full rich and not clear out for a while... Any ideas are welcome.
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Old Jan 11, 2013 | 11:01 PM
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It is either your VE table or your maf table or your pe. lower the number in the sections where you have your problem.

Im not sure the exact way you are running a 2 bar. Make sure you have the MAP settings correct and you read 100kpa at key on engine off.
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Old Jan 13, 2013 | 03:50 PM
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In that log I was unable to see anything useful. What
you want most, is an idea whether this enriched jump
is commanded (commanded AFR vs wideband AFR). If
it's being commanded (like COT) then you can chase
down the actor by the target value being used - though
I guess with the Jet setup maybe you don't get to
touch that kind of stuff.

But if the AFR is diverging from commanded that says
you are looking for some other deal (fuel pressure rise,
a sensor getting shaken loose and telling the car it's
-40F and throwing big enrichment, etc.).

It would help if people attached the .cfg file that was
used to generate the logs. Otherwise I get a bunch of
empty "unsupported param" cells in the table & graphs.
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