rtbrjason Posted June 16, 2011 Share Posted June 16, 2011 Just to give you a better visual idea.. Here are all your knock events from one 78k log file.. The top table is actual knock events, and the bottom shows the total data points.. Note that 78k is not a lot of data so this is a considerable amount of knock. Any knock over 1.1 load or so is typically a problem. Note also that these knock events are happening despite the ECU pulling max timing from your timing table.. Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 I suppose it is too much to ask for the possibility that the knock sensor is bad, right? I mean, I have some idea what engine knock sounds like (okay, old v-8 carbureted engines...) and I am not hearing it in any significant way. Link to comment Share on other sites More sharing options...
rtbrjason Posted June 16, 2011 Share Posted June 16, 2011 I guess anything is possible yes. If the car truly drives fine it could be noise causing the ECU to pull all that timing which would in turn make the car run poorly. Check under the hood for anything that could be causing a rattle. I do however have my doubts on this.. As for logging, if you feel up to it, do one more short driving log with the following parameters: AF/Correction#1 (2 byte) A/F learning #1 (2 byte) AF Sensor # 1 Engine Load Engine Speed Ignition Total Timing Knock Sum IAM Feedback knock Learning knock Roughness for each cylinder. Link to comment Share on other sites More sharing options...
compsurge Posted June 16, 2011 Share Posted June 16, 2011 Is it the original clutch and flywheel as far as you know? Do you notice any clutch chatter or odd vibrations if you tap the gas sharply (~3000 rpm)? Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 No to the clutch questions. It's an automatic transmission (6 speed, I think?). Here are new logs for short trips with a couple of quick but not full throttle runs. The first log: Engine was cold and I thought running kind of rough. I stopped logging and wrote the file: https://docs.google.com/leaf?id=0B2aEuJiEjv06ZjE4MDgwMDAtZDQyOC00M2MxLTllNjgtYjA0MTgwZWQxN2Nk&hl=en_US&authkey=CK2C9MUE Second log: I sent a "Reset ECU" command, turned off, waited 10 seconds, turned to "On", waited about 5 seconds, started engine and drove off: https://docs.google.com/leaf?id=0B2aEuJiEjv06MzRjMDU4M2QtODFhYi00OGQyLWI5OTctYjhhYjM3YzM2MDhh&hl=en_US&authkey=CJaswvwI Third is from Learning View with a drive similar (but not identical) to second log above: https://docs.google.com/leaf?id=0B2aEuJiEjv06ZDkwN2I1MjYtZjllNi00MTZhLTgwYWEtNWEwMmYzYWI1ZGRh&hl=en_US&authkey=CL7ghdwE Link to comment Share on other sites More sharing options...
rtbrjason Posted June 16, 2011 Share Posted June 16, 2011 First log is not useful and the 2nd 2 links appear to be the same learning view. The fact that IAM (ignition advance multiplier) is at 0 explains any power loss. Boost control is disabled by the ECU at this point and you're running a failsafe (RICH) fuel table. Worse though is even with IAM at 0 it is pulling as much as 10 degrees in the lower rpms. Still interested in seeing how roughness monitors increment while driving.. Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 Yeah, your IAM should be 1 but I'm not surprised it's 0, it's pulled so much timing it's not even going to think about advancing it. There's a lot of physical knock with your feedback knock, check around for a loose bolt in the area? I guess that'd be the first thing to check...sometimes loose debris can trip the sensor if it's vibrating near it. Your A/F's look good on the learning view however. -12 of feedback knock, cheeeseee and rice. Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 I fixed the links; sorry. Try them again. Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 cylinder 4 seems to be logging some misfire events. I believe sometimes misfires can cause a false knock as well, or is it the other way around? Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 By the way, Learning View shows no codes. Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 I'm almost wondering if there's a problem with your ECU. You should getting atleast 1 code, lol. Misfires will throw codes, sometimes phantom misfires won't but judging by the amount of cyl 4 misses there are- I'd suspect a code.... and there weren't any codes before you reset the ECU? Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 I'm almost wondering if there's a problem with your ECU. You should getting atleast 1 code, lol. Misfires will throw codes, sometimes phantom misfires won't but judging by the amount of cyl 4 misses there are- I'd suspect a code.... and there weren't any codes before you reset the ECU? This was the first time I used Learning View, so I can't say for certain about before. However, everyone who has worked on this problem has commented that there were no codes thus adding to the confusion about what was happening. I'll try again later after the car has been driven for a bit. Link to comment Share on other sites More sharing options...
rtbrjason Posted June 16, 2011 Share Posted June 16, 2011 I'm not sure what is going on but I suspect something mechanical. I will add that my car pulled similar timing when my engine went. In my case it was accompanied by considerable engine noise. At no point in time did my car throw a code either despite total engine failure. Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 I'm not sure what is going on but I suspect something mechanical. I will add that my car pulled similar timing when my engine went. In my case it was accompanied by considerable engine noise. At no point in time did my car throw a code either despite total engine failure. Valid point, engine mechanical noise, I.E. tapping/knocking can trigger a knock sensor and in turn retard timing. However the OPmeister said his engine sounds fine. Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 Maybe this is kind of silly, but I used my phone's voice recorder to record several seconds of engine sound. It is an .amr file and needs to be played using the QuickTime player. I can look into converting it to an .mp3. https://docs.google.com/leaf?id=0B2aEuJiEjv06MjRjMTYyNTAtNGMwNy00NGE2LTliNmYtMTkxYzc0NjViMmRi&hl=en_US&authkey=CIOewqMJ Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 Here is the same file in .mp3 format: https://docs.google.com/leaf?id=0B2aEuJiEjv06YWRkOWFkYWUtNGVhYy00YTY5LThkMTctODU1ZTc0NDIwMDRh&hl=en_US&authkey=CMG98dYO Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 is that inside the car, outside? idling? driving? edit: yeah that sounds terrible. Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 is that inside the car, outside? idling? driving? edit: yeah that sounds terrible. Hood open, foot on accelerator, reaching over (under) hood with left hand holding phone. I know it isn't a very useful recording... Link to comment Share on other sites More sharing options...
PartyRock Posted June 16, 2011 Share Posted June 16, 2011 maybe a video of the engine running and with part throttle? youtubeeeee Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 maybe a video of the engine running and with part throttle? youtubeeeee Link to comment Share on other sites More sharing options...
DHracer Posted June 16, 2011 Share Posted June 16, 2011 I just read this thread, I have the identical symptons with my car, going thru the same exact thing. Had one cylinder 9 psi low, all others normal. Some days it won't even happen other days its terrible. The hotter it gets the better it runs odly enough? Threw a code for the first time this week twice for bad o2 sensor/circuit. Have not had a chance to change it yet. I feel like its not the issue tho. I wanna drive it off the bridge at times! Link to comment Share on other sites More sharing options...
Legacy25GT2005 Posted June 16, 2011 Author Share Posted June 16, 2011 I wanna drive it off the bridge at times! My son wants to take it back to Afghanistan with him and blow it up! Link to comment Share on other sites More sharing options...
xt2005bonbon Posted June 16, 2011 Share Posted June 16, 2011 maybe a video of the engine running and with part throttle? youtubeeeee ^+1. Time for an HD quality video with (especially) high quality sound recording. Link to comment Share on other sites More sharing options...
rtbrjason Posted June 16, 2011 Share Posted June 16, 2011 Mine was very obvious noise so I don't think OP is having the same problem. [ame=http://www.youtube.com/watch?v=dO50bwaxzwY]YouTube - 08 Spec B engine failure[/ame] Link to comment Share on other sites More sharing options...
xt2005bonbon Posted June 17, 2011 Share Posted June 17, 2011 Mine was very obvious noise so I don't think OP is having the same problem. Dang. Engine looks so new still and already failed. That really sucks. Link to comment Share on other sites More sharing options...
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