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08-23-2018, 07:47 AM | #15 | ||
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Check you dont have exhast leaks you usually get high positive ltft at idle Check intake leaks you want to see boost parameter at about -9 psi ie vaccuum at idle or about 0.3 bar, think oft works in psi and measires 0 boost at atmospheric pressure ie 1 bar 14 psi. But i think oft boost parameter is reliative to atmospheric not absolute If all good then try running full di injection at idle loads ie put zero in the 0.2 and 0.3 load columns in the thre di\di ratio tables Still no good alter the idle conpensation tables this determines how much advance\retard is used to control idle speed thtese tables are defined |
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08-24-2018, 08:25 AM | #16 |
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You could try enriching the CL fuel table at idle loads.....
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08-24-2018, 08:33 AM | #17 |
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Or add fuel through the Engine load compensation table. It idles in 0.2 and 0.3 bar.
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08-24-2018, 09:21 AM | #18 |
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It would closed loop that out
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08-24-2018, 10:50 PM | #19 | |
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Here's a log i captured while my idle was bouncing around. What does your expert eyes see here ?? https://datazap.me/u/junnever/log-15...data=1-9-10-11 |
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08-25-2018, 12:31 AM | #20 | |
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looks like ecu is compensating for something using ignition advance log boost it will show manifold pressure/vaccuum is air conditioning or defrost or defog on as that will cause idle fluctuations what mods do you have ? intake or catchcans or anything else do you have any aftermarket electrical stuff like headlights ? |
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08-25-2018, 08:15 AM | #21 |
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A/C is ON. Bone stock other than Valenti tail lights.
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08-25-2018, 11:09 AM | #22 |
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If it's running lean, I suppose it was meant that it runs off target AFR? Didn't have the problem, so can't say if it will help. But it might be worth a try.
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08-25-2018, 06:46 PM | #23 |
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Seems that some setups like a little enriching at idle. It isn't this platform specific. Certainly stopped mine from bogging.
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08-25-2018, 09:52 PM | #24 |
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10-21-2018, 10:45 PM | #25 |
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So I finally flashed the new Stg-2-plus-v4.03 tune (I was running the OFH v1 tune prior) to see if I could feel any differences. After giving the car about a week to settle into the new tune, I noticed more throttle lag than previous, and the car seemed less responsive at all throttle ranges. I logged a few 3rd gear pulls and noticed am at 0.7 with minor flkc corrections.
This worried me at first that significant knocking was initiating an am drop from 1.0 to 0.7. I finally sat down and decided to delve into the differences between the OFH v1 tune and the new Stg-2-plus-v4.03 tune and here's the highlights... 284 same tables 19 changed tables 38 new tables As for the changed tables, the significant differences to the v4 tune include: Initial am at 0.7 vs 1.0 (causing the laggy feeling) Base timing b table timing reductions above a load of 0.7 and 3700rpm Start-up idle speeds were decreased A/F learning limits were narrowed down Overall, it appears the new tune is more a more conservative replacement. I miss the response so I plan to adjust the initial am back to 1.0, make a few other minor updates, and do some logging. |
10-29-2018, 02:49 PM | #26 | |
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There was quite a length discussion around here on the forum for why it was set to 0.7 and not 1.0 and lots of flaming. After driving for quite some time with all the different tunes, it makes sense that IAM should be at 1.0. The whole point of tuning is to make the car perform (fairly generally speaking) to the max of its potential. It's not difficult to consistently get the same octane of gas, let alone the same brand name too. If it were 0.9 IAM, I understand, but there's no differentiation in 91 and 93 octane with the newest tune. Anyone have mapping for 93 octane gas for the latest OFT tunes? |
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10-31-2018, 10:00 PM | #27 |
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11-01-2018, 12:40 AM | #28 | |
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I set my IAM to 1.0 and had to pull about 3 deg out of the OTS Stg1 v4.03 tune base timing table B at high load around 4800 rpm. Been compketely knock free and don't have that dead pedal feel. I only use California 91 from Valero (also elimnates crickets!). |
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