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10-22-2018, 08:25 PM | #57 | |
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Without a log, it's difficult to say what is causing your problems. If you want to check, you could just change back to the OFT AVCS on your current tune. Bucking and stumbling doesn't sound AVCS related though. Sounds more like fuel or timing problems. Under which conditions does it occur? I had a car with bucking issues under relatively constant low rpm and load. It turned out to be too much transient ignition retard on small throttle changes so the timing was retarded too much and caused the bucking. Not saying this is your problem at all, just saying there can be a lot of reasons and the only way to figure it out is to log. Not sure what you mean with "breaks up"?
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10-23-2018, 07:12 PM | #58 | |
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I'm not trying to hijack your thread but here's where I'm at... I suppose by "breaking up" I mean stumbling and loss of power, but it almost like it has hit a limiter, not as if it dies off, it just bogs. I have since returned to the OFT v4.03 map with only the IAM changed to 1 and nothing else. Below 3.5k, under medium load (above maybe 1.0v MAF) and under several other situations as well. I have noticed that the Intake VVT channel is freaking out in the logs and makes no sense, while the exhaust follows what it should. In the second log you can see a misfire on cylinder 1 under these conditions where it's "breaking up." It has new spark plugs and wasn't doing it before or for the first 3k miles after. Under very hard driving, before switching back to the OFT tune, it threw a P0366 code for the bank 1 exhaust camshaft position sensor performance (only ever did it twice) and has not returned since switching back, but still has issues. I'm worried I might be falling victim to the timing gear/actuator/ECU issue that plagued so many '13s. Log 1: https://datazap.me/u/craneom/stumbling?log=0&data=1 Log 2: https://datazap.me/u/craneom/stumbling?log=1&data=1 Crappy video where you can kind of hear it "breaking up": I have had terrible luck with this car from the day I bought it, so I wouldn't be surprised if this turns into something serious. Last edited by craneom; 10-23-2018 at 08:24 PM. |
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10-23-2018, 09:31 PM | #59 | |
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The reason for asking is that it doesn't look like v4.03. It looks like it's an old calid which for sure doesn't log intake AVCS correctly. You have a CEL during the video. This is definitely not related to these cam tables. You have some kind of hardware issue. The misfires could be caused by a broken coil pack. Cylinder 1 is usually the one that fails first. CEL for that is P351. Read out any CELs, if nothing related to AVCS, log the AVCS with the v.4.03 tune and do a WOT pull from 2 to 5-6k rpm (or redline if you can without it misfiring). Check that they are actually outputting what they should from the tables.
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10-24-2018, 10:58 AM | #60 | |
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CID is ZA1JA01C. The CEL was flashing for misfires, but did not store a code and does not normally do that as I try to avoid driving under conditions which cause it. It has not stored any code other than P0366 which only ever came up twice and has not come back. A 3rd gear WOT pull will misfire terribly from 2K-4K and most likely above 7k as well. I am perplexed because it has yet to store a misfire code or a coil pack code. I will try and get the log this afternoon and see what happens. I will also most likely swap the coil to cylinder 3 and see if the misfire follows. |
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10-24-2018, 05:52 PM | #61 |
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Alright here are two 3rd gear pulls and some idle and driving with small pulls.
First Pull to red-line: https://datazap.me/u/craneom/more-mi...s?log=0&data=1 Second pull to just shy of 7k: https://datazap.me/u/craneom/more-mi...s?log=1&data=1 Some idle and driving logs: https://datazap.me/u/craneom/more-mi...s?log=2&data=1 |
10-24-2018, 08:33 PM | #62 |
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You forgot to log the intake cam. V. 4.03 should log intake correctly. Maybe you need to update the OFT template file?
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10-24-2018, 10:47 PM | #63 |
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I didn’t bother logging the intake cam because it was still displaying incorrectly. I can try and wipe everything and go all the way back to stock and see what happens... I swapped the #1 and #2 ignition coils and the misfires did NOT follow. Under load while misfiring below 4K it threw the P0366 code twice this evening after clearing it out. I can pull the plug but I’m not sure thatll be the issue if it’s almost brand new. I’m not sure if a bad camshaft sensor would cause misfiring, but misfiring can cause that code to come up even if the sensor is fine.
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10-25-2018, 12:42 PM | #64 |
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I have gone all the way back to stock tune and the VVT log is still freaking out.
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10-25-2018, 04:49 PM | #65 | |
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If it throws P0366 continuously, I would have it looked at. I don't know how a broken sensor would affect the log output. Perhaps the reason for the crazy values?
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10-25-2018, 11:21 PM | #66 | |
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I’m trying to avoid the stealership if possible due to financial deficits from recently being unemployed. It’s possible I had a hairline crack in that plug so I am going to replace it tonight. If that doesn’t work I’m resorting to swapping the cam position sensors from bank to bank and maybe even the actuators. What I don’t understand about the bad sensor logic is that the code is for the exhaust cam sensor while the intake is the one bugging out in the logs. |
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10-26-2018, 03:10 AM | #67 |
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I’ll end the thread jacking here and return to AVCS discussions after this post.
I flashed the car back to stock, disconnected the battery and completely wiped the tablet and my computer of tunes and definitions. I grabbed fresh v4.03 files and updated the tablet template. I again edited the Stage 2+ map to set the initial IAM to 1.0 and flashed the car. In the mean time, I wiggled out the #1 plug and was in for a surprise. After only 5K miles, the ceramic was cracked in several places. I replaced it with another OEM Denso plug and fired it up with the fresh tune. It idled as smooth as glass. I then took it out for a spin to get it up to temp and do a few pulls; and has zero misfires or bogging/hesitation. Obviously it’ll take some miles before it relearned itself fully, but it’s much better. Now, the strange behavior of the Intake VVT channel continues.... To return to the topic, what have you done to your tune regarding loads/load limits? |
10-26-2018, 07:29 AM | #68 | ||
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I've scaled the MAF and then adjusted the load limits. Thereafter adjusted the Engine Load Compensation table. Check out this thread: http://www.ft86club.com/forums/showthread.php?t=119535 You can try these Load limits for a start. I usually start out with those for the Gruppe-S header and adjust from there: P.s. If you don't want to go through all that hassle, you can still just use the AVCS with the OFT v.4.03 tune.
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10-26-2018, 02:51 PM | #69 |
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An update roughly 16months ago has caused my intake cam readings to read incorrectly. I approached OFT about it but to no avail. I am running a ROM based on B01C.
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11-23-2018, 12:59 AM | #70 | |
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Overall not sure how much of a difference it made, but it was fun using. What intrigued me the most using it was that the tool kept pointing the exhaust cam in the 4k-5k rpm range to 50°. The stock tables only go to 40° |
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