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04-11-2012, 12:03 PM | #23 | |
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Spark plugs solved my timing drop issues. Since you think the injectors are the most likely cause, I guess you should start there. Good luck
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04-11-2012, 06:37 PM | #24 |
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What about timing pulls with 4.01 Stg 1 ST aggressive with top tier 93 octane all new injectors/coils/plugs/DME/walnut blasting?
They are corrected with some E85 added to the mix.......... Another question, how do you know if the E85 is any good? It is only at one station here and there is NEVER anyone there getting it. It must be old. T Last edited by Mangler; 04-11-2012 at 06:52 PM.. |
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04-11-2012, 07:22 PM | #25 | |
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04-11-2012, 07:55 PM | #26 | |
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04-11-2012, 07:57 PM | #27 | |
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If they are corrected with e85 then the tune is too aggressive for you particular conditions. |
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04-11-2012, 08:00 PM | #28 | |
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04-11-2012, 08:06 PM | #29 | |
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When ATR comes out you can likely dial down the boost in that and/or reduce ignition. Or get a protune. Or go to a less aggressive map. |
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04-11-2012, 08:15 PM | #30 | |
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When are they going to put ION sensing on these engines...... T |
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04-12-2012, 11:35 AM | #31 |
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When I look at a log, I always like to view the original .csv file, and the first thing I look at is individual cylinder timing correction. Which cylinders are "noisy" varies from car to car, so viewing all them at the same time gives you a good idea of overall timing correction. Correction in 1, 2, or sometimes even 3 cylinders under load would be somewhat normal. But, consistent timing correction in 3+ cylinders under load typically means the tune is too aggressive for the car.
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04-12-2012, 01:15 PM | #32 |
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Bear in mind that it takes a few days for the car to adapt to the new map.
When I first flashed Stg2+ aggressive, i had timingdrops on 3 cylinders(immediately after switching to 4th gear). But after giving the car a few days to adapt, now i have none at all.
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09-16-2012, 04:56 PM | #33 |
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I'm just beginning to learn to read my own logs. So far, I think things look pretty good - the only thing I've noticed is an occasional timing correction and a single TPS closure (always between 1-2 gear). Had one in all three logs, but different cylinder in each log, at different rpms, and only one correction in the whole log (1-2-3 gear pulls, since when I floor it it always downshifts to 1 - at leat I think it does?). Are these something to look into, or pretty normal?
Running Stage 1 sport on stock E93 N54 right now. Want to live with that for a while until I move up to aggressive (both to enjoy a the power bump twice, and to watch the logs to make sure the car is liking the tune). EDIT: the TPS may be closure induced by DTC/DSC, since I know I forgot to turn it off in the first log. In the last one, it's in exactly the same place - bet I forgot again.....
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2007 E93 N54 Last edited by andrew_b; 09-16-2012 at 05:07 PM.. |
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09-16-2012, 06:49 PM | #35 | |
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Once I get a log that is decent (remembering to disable DTC/DSC, good start, etc) will post to make sure I'm reading it right....but this is a huge help.
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09-16-2012, 06:50 PM | #36 |
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duplicate
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09-16-2012, 07:30 PM | #37 | |
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If the throttle closure is not traction control related you're probably overshooting boost targets. |
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09-16-2012, 09:12 PM | #38 | ||
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pull 1: boost mean: 32.15, boost req: 29.71, TPS dropped to 40.03% pull 2: boost mean: 31.32, boost req: 29.45, TPS dropped to 58.92% Both occured at the bottom of the RPM drop (4590 and 4572) when it shifted from 1st to 2nd. If that is what is causing it, what can be done?
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09-16-2012, 09:18 PM | #39 |
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Ok, looking closer...further down the graph, in the shift from 2-3, the boost mean and requested boost do almost exactly the same thing (I mean, almost identical numbers), and no TPS closure.
But the overshoot (difference) is less - under 1. Need more logged pulls I guess.... |
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09-16-2012, 10:17 PM | #40 |
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I have a manual transmission and have only spent a couple days driving a 6AT so I can't give you any real great tips, however i've read from a few guys that if you're VERY careful with it in M mode you can feel it hit a stop before it hits the kick down button.
Before making any attempt to fix any boost over shoots you need to be sure that's what's going on. If the throttle closes because of traction control then it will cause a boost spike(the TMAP sensor is pre-throttle body, so that means that throttle plate closures will spike boost pressure in the charge pipe.) Get some good DSC off 3rd gear logs. IF YOU'RE HAVING BOOST OVERSHOOT CLOSURES: In order to fix the boost over shoot you'll need to use the ATR software. There are a couple ways to do it(in MOST cases, some cases may require special attention but yours should be taken care of.) 1)This is the more involved, but most accurate way. Log Boost setpoint factor and MAF req WGDC and then back off the values(a good rule of thumb is reduce the current value by 10%) in the WGDC base table around where the boost overshoots occur. 2)This is the quicker, dirtier way of doing it. It shouldn't cause any problems but it's just not the preferred way IMO. Simply open the WGDC base table and reduce ALL cells by 10%. So 57% becomes 51.3%, 6% becomes 5.4% etc... It still takes a couple minutes but is a little less involved. Once you make an adjustment then save the map and flash it to the car and log and see how it looks. If it's good then you're done, if not repeat. Last edited by Ænema; 09-16-2012 at 10:28 PM.. |
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09-17-2012, 12:30 AM | #41 |
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1-2 gear wont look clean. logs should be taken in 3-4 gear.
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09-17-2012, 07:12 AM | #42 | |
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So should I really just ignore the data from 1-2? So far, it looks like the closure is always right at the 1-2 shift point. 2-3 and 3-4 (the data between the spikes where the shifts are) all look really good (as far as I can see) except for a single timing correction on 1 cylinder (different cyl in each pull).
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