04-06-2023, 05:57 PM | #29 | |
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04-06-2023, 06:12 PM | #30 |
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No other mods, just catback right?
IAM is a bit low so it being stock tune does raise a bit of a red flag. LTFT is also high positive, but don't know engine temp and injection mode. I'd ask you to do a log then but I am drawing a blank on some parameters that we would need to see.
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04-06-2023, 06:17 PM | #31 | |
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AEM dryflow drop in filter, Perrin silicone inlet tube, and Fujitsubo Authorise S axleback. That's it as far as power/engine performance mods.
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04-06-2023, 07:38 PM | #32 |
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Have you considered flashing an OTS tune to it to see if it fixes it? Just curious. The stock maf scaling is sometimes not good. I messed up scaling my maf once, went the wrong direction, and it causes all kinds of drivability issues and dropped IAM with no codes.
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04-06-2023, 07:49 PM | #33 | |
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Yep. I was actually getting ready to flash an OTS tune, but then that stuff with the stalling/MAF sensor happened so I held off until I could ensure that the car was healthy.
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04-06-2023, 10:21 PM | #34 |
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FWIW, I believe that the knock/ping/detonation is real. I still wanted to rule out the other stuff.
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04-07-2023, 07:45 AM | #35 | |
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04-07-2023, 11:05 AM | #36 | |
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@tomm.brz this may be getting into your realm of expertise. Something you have seen before?
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04-07-2023, 12:26 PM | #37 |
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So I got a video of the knock, you can hear it loud and clear once I put the camera outside. I also logged these blips but gonna need to upload it later.
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04-07-2023, 12:29 PM | #38 |
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It's almost like the ecu can't trigger the direct injection fast enough when activated with the throttle blip.
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04-07-2023, 12:33 PM | #39 |
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need a log of precisely that happening while recording the log to say something
also 91 oct ca nt be good enough for the stock tune and advance multiplier should drop accordigly Also if you take a look at knock correction table of stock tune you see the "worst" knocking area for Subaru is right at low rpm high load so when you jump on throttle suddenly on low rpm I d bet you have one of the first revision of the 2013-2014 tunes, which don t have a timing revisions from Subaru during fast transients/blips so timings can get too high and cause pre ignition and the most common failure caused by this is the oring in the DI injectors that disintegrates i don nt think one is able to hear the proper engine "knock" sound just by blipping the acceleator, but you can clearly hear if the oring popped, by a loud popping dry sound when you quickly blip the throttle Without a video of the sound and a log anyway is difficult to guess EDIT: oh well the OP is providing while i was writing this, so i ll wait for the logs |
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04-07-2023, 12:35 PM | #40 |
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from the noise, it sounds indeed like an oring popped, try to make a video with engine bay open and have someone blipping for you while you record
it gets loud when done like this so it s easier to confirm but it s already 95% popped DI oring for me You ll need to replace the oring within all 4 injectors, then flash to OTS tunes as they have the fix already, or a more recent stock tune , or a custom tune directly |
04-07-2023, 12:46 PM | #41 | |
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https://www.dropbox.com/s/k0uqa9cnq9...Knock.csv?dl=0 No knock correction which is interesting... |
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04-07-2023, 12:48 PM | #42 | |
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