Benjy Posted October 21, 2014 Share Posted October 21, 2014 With the "feathering" and it only seeming to misfire on WOT/heavy throttle, it definately sounds like ignition failure of some sort mate. It's not unusual for coils and/or plugs to break down when warm and under heavy load. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 With the "feathering" and it only seeming to misfire on WOT/heavy throttle, it definately sounds like ignition failure of some sort mate. It's not unusual for coils and/or plugs to break down when warm and under heavy load. Yeah I know just gettin pissed off. I just want to drive the bloody thing lol Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted October 21, 2014 Share Posted October 21, 2014 Gutted for you mate When its running spot on, you'll love it! Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 Gutted for you mate When its running spot on, you'll love it! Hopefully it will be running well soon bud cheers. Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted October 21, 2014 Share Posted October 21, 2014 (edited) Are the yellow parameters in the first picture the faults? If so could the syvecs be creating a misfire on boost to prevent the autobox temperature becoming dangerously high? Edited October 21, 2014 by Justin Bieber (see edit history) Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 21, 2014 Share Posted October 21, 2014 Looks like the Lambda sensor has croaked, or a wiring issue. Can you read the real time Lambda on a gauge or the diagnostics for the Syvecs? With no Lambda signal it's probably mapped very safe, and to give low / no boost and go rich. BTW, that's not a log, it's just a set of screenshots, a proper log of the fault occurring would be much better. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 Ryan said those shots are old errors so not actual. I've to send him datalog of the car doing it so he can check. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 Are the yellow parameters in the first picture the faults? If so could the syvecs be creating a misfire on boost to prevent the autobox temperature becoming dangerously high? Old faults apparently Ryan ironed out. There's two tranny coolers on the box. I'll send Ryan the datalogs. Quote Link to comment Share on other sites More sharing options...
Geo Posted October 21, 2014 Share Posted October 21, 2014 guess its laptop back in, you drive i'll pull logs then? im just double checking im doing it right. open Sdata, plug in the ethernet cable with the ignition on but don't start the engine, click device, auto read and it will show a ID window, click ok and it downloads it(rename today's date) It then asks if you want to clear the logs and logbook, click yes. Then file, view in Sview and bingo Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 Cool we can do that once the new coils are in bud. Quote Link to comment Share on other sites More sharing options...
Al Massey Posted October 21, 2014 Share Posted October 21, 2014 guess its laptop back in, you drive i'll pull logs then? im just double checking im doing it right. open Sdata, plug in the ethernet cable with the ignition on but don't start the engine, click device, auto read and it will show a ID window, click ok and it downloads it(rename today's date) It then asks if you want to clear the logs and logbook, click yes. Then file, view in Sview and bingo I should really try this. Tony, hope you get it sorted soon bud Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 21, 2014 Author Share Posted October 21, 2014 I should really try this. Tony, hope you get it sorted soon bud Cheers dude. Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted October 21, 2014 Share Posted October 21, 2014 guess its laptop back in, you drive i'll pull logs then? im just double checking im doing it right. open Sdata, plug in the ethernet cable with the ignition on but don't start the engine, click device, auto read and it will show a ID window, click ok and it downloads it(rename today's date) It then asks if you want to clear the logs and logbook, click yes. Then file, view in Sview and bingo Yep, that's it. Also, if you plug the laptop in and open Smon you can live watch any data you want while the car is running, but you have to set up the graphs. Don't worry though, from that you can't modify or delete the map....that really would be a bad day out! Lol Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 24, 2014 Author Share Posted October 24, 2014 Brand new OEM coils fitted. Misfire remains. Best try plugs next f##k sake I'm due setting this c##t on fire. Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted October 24, 2014 Share Posted October 24, 2014 Brand new OEM coils fitted. Misfire remains. Best try plugs next f##k sake I'm due setting this c##t on fire. I would try another set of plugs first, highly unlikely though if they are new. Might be the ignitor pack. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 24, 2014 Author Share Posted October 24, 2014 It can't be much else now surely only plugs and ignitor to try. If it isn't any of them then I'll need to get the logs to Ryan to have a look at. Quote Link to comment Share on other sites More sharing options...
mrboomberang Posted October 27, 2014 Share Posted October 27, 2014 Any bother i get with missfire is always plugs Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 27, 2014 Share Posted October 27, 2014 If that is the case either the plugs are the wrong type or grade, or you have a serious mapping issue. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 27, 2014 Author Share Posted October 27, 2014 If that is the case either the plugs are the wrong type or grade, or you have a serious mapping issue. I've racing 9's coming tomorrow Chris I'll change them over and swap igniters over. I doubt it's the mapping as it pulls really strong till it's quite hot then craps itself on kick down. I'll fit new plugs and hope that's it sorted. If it's not plugs now I'm lost. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 29, 2014 Author Share Posted October 29, 2014 Still to fit the plugs as they haven't arrived yet. I had the car out tonight for a drive and it never skipped a beat for an hour then the miss reared it's head again. Bugger. If it drives on boost with no issues for an hour with a good few kick down pulls I have my doubts it's a plug related issue. Hopefully the plus arrive tomorrow anyway so I'll get them done and start pulling logs for Ryan. It's a bizarre fault. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 29, 2014 Share Posted October 29, 2014 Wouldn't hurt to monitor the fuel pressure. The pump could be getting tired after an hour or so.... bit of a shot in the dark, but after reading the thread it's a bit of an odd issue considering what you've changed so far. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 29, 2014 Author Share Posted October 29, 2014 Wouldn't hurt to monitor the fuel pressure. The pump could be getting tired after an hour or so.... bit of a shot in the dark, but after reading the thread it's a bit of an odd issue considering what you've changed so far. It's certainly a weird one as it drives great for an hour. The pump is brand new with a 12volt supply bud. Can't really rule it all out yet as I've still the plugs to try but I doubt it's plugs to be honest. AFR's when it's pulling good is around 11.9 but when it misses I'm seeing low 10's. Quote Link to comment Share on other sites More sharing options...
Big Supes Posted October 29, 2014 Share Posted October 29, 2014 Agreed mate. I'd be surprised if it was the plugs as they would fail a lot earlier on. At what RPM does it start missing at? If it's consistent, it could be the ECU safe guarding the engine. Could be a drop in fuel pressure. Either way, I'm dying to know. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 29, 2014 Author Share Posted October 29, 2014 Agreed mate. I'd be surprised if it was the plugs as they would fail a lot earlier on. At what RPM does it start missing at? If it's consistent, it could be the ECU safe guarding the engine. Could be a drop in fuel pressure. Either way, I'm dying to know. When the miss is on if you floor it then it happens straight away. Wont come on boost but I can feather it in gently and it will build pressure to about 120mph then starts to slightly misfire again. If you drive normally it's a dream and it idles perfect. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted October 29, 2014 Share Posted October 29, 2014 30 minutes on a dyno with diagnostics attached would show the cause, if the logs don't point a finger at anything. Can you log the wideband, that would give a good clue? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.