xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 Somehow it *appears* that your ECU got reset between 3 and 4. I mean look at your learned values: they are all almost zeros. How can they become zeros like that? That is very strange. You sure it did not get reset between 3 and 4? Also, when the ECU gets reset, does your IAM become 0.5 and then slowly goes to 1.0? I believe this is how the stock ECU are set up. But your tuner can change that (mine did). Link to comment Share on other sites More sharing options...
StkmltS Posted September 4, 2015 Author Share Posted September 4, 2015 I guess the ECU could have been reset somehow, but how often do ECU's spontaneous reset themselves? I didn't tell it to reset and the battery didn't get disconnected. My wife can't drive a manual so I know she didn't do anything. When my ECU resets the IAM does go to .5, but I've never seen it at anywhere between .5 or 1.0. After a reset it usually stays at .5 for about ten to twenty minutes of driving and then it goes right to 1.0. Last night my wife said "You aren't going to like this, but maybe you should think about selling the wagon".... ahhhhh! My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
heiche Posted September 4, 2015 Share Posted September 4, 2015 (edited) Sometimes these events happen. Maybe there was a quick burst of knock for some reason and the ECU dropped the IAM. What's important is that it recovers back to 1.000 fairly quickly, like you've observed in the past. If it lingers there and struggles to get back to 1.000 for several drives, that might be more of an issue. Sometimes doing an ECU reset will actually get it to climb back to 1.000 quicker - but sometimes not if there's underlying knock. One time I was driving down the highway and an alert went off because my IAM had dropped. I immediately started sweating, and pricing a new shortblock in my head... About 1 minute later it was back up to 1.000! Very odd. Again, if it recovers quickly, it's not TOO big of an issue. Edited September 4, 2015 by heiche added anectote BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
StkmltS Posted September 4, 2015 Author Share Posted September 4, 2015 It was still at .625 for my drive to work this morning so if it doesn't go back up to 1 on my drive home I'll reset the ECU and see if that does any good. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 It still does not explain how your trims went from +10 to 0. Or maybe, when the IAM drops below 1.0, it also reset the trims? Ah that would make some sense actually I think... Link to comment Share on other sites More sharing options...
gimpydingo Posted September 4, 2015 Share Posted September 4, 2015 I guess the ECU could have been reset somehow, but how often do ECU's spontaneous reset themselves? I didn't tell it to reset and the battery didn't get disconnected. My wife can't drive a manual so I know she didn't do anything. When my ECU resets the IAM does go to .5, but I've never seen it at anywhere between .5 or 1.0. After a reset it usually stays at .5 for about ten to twenty minutes of driving and then it goes right to 1.0. Last night my wife said "You aren't going to like this, but maybe you should think about selling the wagon".... ahhhhh! My wife went to start the 07 LGT one morning and it would just crank. She took the other car. Looking at 07 I realized the ECU reset itself, first time this had ever happened, and not sense. IAM at .5, lv cleared, very odd. Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 ^ wow Link to comment Share on other sites More sharing options...
gimpydingo Posted September 4, 2015 Share Posted September 4, 2015 ^ wow I had unplugged the o2 and turned on the car to test something, obv got a code, which I never cleared. Thought that might have something to do with it, but I hadn't ever read about having a code resetting the ecu. Don't know what happened. I turned the key to acces for a few sec, then cranked and it started fine Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 Yeah. it's weird. Link to comment Share on other sites More sharing options...
StkmltS Posted September 4, 2015 Author Share Posted September 4, 2015 I reset my ECU on the way home and within a couple minutes IAM went back up to 1. Now I just have to fight the rough idle and stalling until the LVs get back up to where they should be... shouldn't be... my car hates me. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 Have you been watching your oil consumption? Link to comment Share on other sites More sharing options...
StkmltS Posted September 4, 2015 Author Share Posted September 4, 2015 My leaky OCV has been fixed for a while now, but even with that leaking and smoking for several weeks my oil level hasn't dropped. I'm getting close to my next oil change, which means my oil consumption between OCIs (3k) is still as close to zero as can be measured via the dipstick. For the love of spending money on this car I'm probably going to get an oil analysis done to see if it tells me anything new. I noticed the color of my coolant is a little murky so I may send some of that to get checked too. At this point I'd be pretty excited to find out I need a new head gasket. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
heiche Posted September 4, 2015 Share Posted September 4, 2015 At this point I'd be pretty excited to find out I need a new head gasket. BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 Man, I don't know what to tell you. Do you know of any shop in your area that specializes in Subaru? if there is one, I'd bring the car there and see what they notice. Link to comment Share on other sites More sharing options...
StkmltS Posted September 4, 2015 Author Share Posted September 4, 2015 Turn in Concepts ("FU Cam Bolts" anyone?) is only about 30 minutes away... but I'm too afraid of what I think they'll say My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 4, 2015 Share Posted September 4, 2015 Just go see them man. Show them this thread and let them do a diagnose. It may have a happy ending who knows . Link to comment Share on other sites More sharing options...
StkmltS Posted September 18, 2015 Author Share Posted September 18, 2015 I bought an oil analysis from WIX (on Amazon) and mailed it off this past Monday. In the sadistic "a Subaru owns me" kind of way I'm hoping it comes back with abnormally high aluminum content. Next month I'll put a line in the budget to have TIC look at the car. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
heiche Posted September 18, 2015 Share Posted September 18, 2015 In the sadistic "a Subaru owns me" kind of way I'm hoping it comes back with abnormally high aluminum content. Great line. Totally relate BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
xt2005bonbon Posted September 18, 2015 Share Posted September 18, 2015 Car still running the same though? Or getting worse? Link to comment Share on other sites More sharing options...
StkmltS Posted September 18, 2015 Author Share Posted September 18, 2015 It runs the same as usual. The misfire is still present, but it otherwise drives fine as long as the LVs stay where they shouldn't be... should be... whatever. It's been sitting in my garage for about a week now with a halfway completed oil change while I've been waiting for my local dealership to call me back saying I can come pick up my new valve cover bolt. Once that shows up I'll recheck the valve clearances, fix the broken bolt, finish the oil change, and change the TB + goodies. Several weeks ago I replaced all of the 4mm & 6mm OEM vacuum hoses with new silicone ones. I've also replaced the broken grounding strap. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
StkmltS Posted September 24, 2015 Author Share Posted September 24, 2015 Measured valve clearances post-VJ: Cyl#2 intake: .007" (unchanged) Cyl#4 intake: .007" (unchanged) Cyl#2 exhaust: .014" (was .008") Cyl#4 exhaust: .013" (was .012") Broken valve cover bolt is out! What a pain in the butt. I need to clean up the threads a bit, other than that I'm surprised how cleanly it came out considering the funky angle I had to use to get to it. http://images.tapatalk-cdn.com/15/09/24/26ac78cd60ff2cec213da703a27e7f91.jpg Sent from inner space. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
StkmltS Posted September 25, 2015 Author Share Posted September 25, 2015 Oil analysis results here http://legacygt.com/forums/showthread.php/used-oil-analysis-stock-05-gt-103k-miles-245634.html?p=5241594#post5241594 My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
heiche Posted September 25, 2015 Share Posted September 25, 2015 wow, no "red flags" came back in the analysis? no "found half-inch chunks of piston"? In all seriousness, I'm not familiar with the numbers, and there's no acceptable range given for them, so I'm just going by the diagnosis paragraph. BtSsm - Android app/Bluetooth adapter. LV, logging, gauges and more. For 05-14 Legacy (GT, 2.5, 3.0, 3.6), 02-14 WRX, 04-14 STi, 04-14 FXT, 05-09 OBXT Link to comment Share on other sites More sharing options...
StkmltS Posted September 25, 2015 Author Share Posted September 25, 2015 wow, no "red flags" came back in the analysis? no "found half-inch chunks of piston"? In all seriousness, I'm not familiar with the numbers, and there's no acceptable range given for them, so I'm just going by the diagnosis paragraph. Same here, I was hoping for off-the-chart coolant or aluminum content. My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
StkmltS Posted September 29, 2015 Author Share Posted September 29, 2015 This past weekend at a local Subaru meet I talked to the owner of a highly modified OBX about my misfire. After explaining my symptoms and talking about everything I've already tried, he was certain that my turbo inlet is the problem. He said my #2 cylinder only looks like the problem because it just happens to be the cylinder most affected by the un-metered air entering the inlet somewhere it shouldn't. He's a Subaru ambassador so he's gotta know what he's talking about, right? A problematic inlet seems like it would explain everything: The misfire goes away under boost Engine temp doesn't change the symptoms Good compression & leak down resultsNo change after swapping plugs / coils / injectors / orings / gaskets The engine doesn't consume oilAcceptable UOA results (for the newbs: Used Oil Analysis)Positive LV's in all four ranges I haven't thoroughly inspected my inlet, but with just a quick glance it's obvious that the turbo end of the hose looks pretty ugly. It's visibly deteriorated enough that I wouldn't ever dare take it off and hope to reuse it. A new inlet was already on my #YNANSB shopping list, so... I ordered a new inlet and hopefully I'll find enough time to get it installed this weekend. I didn't buy an OEM inlet because why replace an OEM part with an OEM part? What do I look like? A silly fuddy-duddy person who thinks aftermarket parts are a waste of money? I went with a blue Mishimoto (MMHOSE-SUB-08IH). My DiySB rebuild Got Misfires? Link to comment Share on other sites More sharing options...
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