turbotrana Member 2,586 Member For: 21y 9m 7d Gender: Male Posted 23/10/12 02:42 AM Share Posted 23/10/12 02:42 AM I think this is an FG specific problem with Drive by Wire hooked into the equation somewhere.Below are the Spark Source Values I have been logging. The datalogs shows abnormallity in the way you would expect the spark to operate.When decelerating you would expect to see 18 then 9 when you come to idle. Except sometimes its 18 then 9 for a second then 1 or 0 or 2 then sometimes 4 or 7 or 8 then settles to 9. The idle timing(9) is about 10deg and will spikes on the other maps (up to 40+deg) and causes sh*tty idle.So really only a datalog can tell you if its a similar issue to mine.0 Crank or under speed1 Base2 Borderline3 Torque control4 Pre-ignition6 Stabilized low load7 Cold engine low load8 Idle feedback at minimum clip9 Idle feedback10 Spark set by on-demand self-test15 Output State Control16 Foreground Spark Borderline Clip18 Closed-Throttle Deceleration Spark 1 Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 10d Gender: Male Location: @ my laptop Posted 23/10/12 03:03 AM Share Posted 23/10/12 03:03 AM although throttle blade position is used to control idle,the ecu uses spark to help control idle speed as it is quicker than adjusting throttle position Link to comment Share on other sites More sharing options...
FGX 40T Donating Members 142 Member For: 14y 9m 1d Gender: Male Location: WA - South of the River Posted 23/10/12 03:56 AM Author Share Posted 23/10/12 03:56 AM Thanks - so what do you think my tuner should focus on - idle spark or throttle position or both. Sorry I have liitle knowlege or understanding of any of this. Cheers Link to comment Share on other sites More sharing options...
Paulie2256 Donating Members 7,441 Member For: 16y 1m 16d Gender: Male Location: SE Melbourne Posted 23/10/12 04:03 AM Share Posted 23/10/12 04:03 AM annnnnnd jesus just found this thread. prepare for your idle to be healed. 2 Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 10d Gender: Male Location: @ my laptop Posted 23/10/12 04:16 AM Share Posted 23/10/12 04:16 AM he needs to check the lot and for possible other car issues Link to comment Share on other sites More sharing options...
sexual harrassment panda I see a red door and I want to paint it black Donating Members 5,919 Member For: 15y 2m 12d Gender: Male Location: Far north queensland Posted 23/10/12 04:23 AM Share Posted 23/10/12 04:23 AM how old is your diff bush? 2 Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 16y 7m 6d Gender: Male Location: Adelaide Posted 23/10/12 04:28 AM Share Posted 23/10/12 04:28 AM /\/\/\ this guy /\/\/\ Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 5m 30d Gender: Male Location: OZ Posted 23/10/12 04:38 AM Share Posted 23/10/12 04:38 AM When I was running e85 I ran into this problem of spark jumping and leading to a miss at idle, even when I commanded low idle timing. This was a simple fix in the end but it had me scratching my head to start with. It wasn't throttle or idle timing related....it was the relationship between various timing tables. The spark source for idle is obviously 9 but that doesn't inform you as to the base spark value :-)If you have to take forum advice to your tuner.......well I won't even say anymore! Plus they aren't likely to listen!As ratter eluded too..... you have to ensure your vehicle is mechanically sound also. 1 Link to comment Share on other sites More sharing options...
boost69 Donating Members 737 Member For: 19y 7m 19d Posted 23/10/12 05:14 AM Share Posted 23/10/12 05:14 AM My stock FG does this sometimes when pulling up at the lights, it feels like it's going to stall and then recovers, does not happen all that often but you do notice it when it happens.So im thinking it could be an FG issue rather than the product of your tune. Link to comment Share on other sites More sharing options...
IH8TOADS Silver Donating Members 3,618 Member For: 19y 5m 30d Gender: Male Location: OZ Posted 23/10/12 05:52 AM Share Posted 23/10/12 05:52 AM Yeah could be a common problem, or even something mechanical/service orientated...maybe a few mods and tune elevate it? Link to comment Share on other sites More sharing options...
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