MichaelR32GTR Posted March 24, 2020 Report Share Posted March 24, 2020 hello guys, just after some help in regards to my idle running electronic throttle with link g4+ fury, while I'm at cruise rpm and I clutch in to change gears, revs always jump up to 3500-4000rpm everytime I change gears. and coming to a stop at red lights and the cars still rolling, I clutch in to neutral and revs spike again high for atleast 4 seconds then settles to idle I have attached my tune file if I can get any assistance with this matter, it would be much appreciated ! ps, could a vacuum leak cause this issue (I'm running map sensor not air flow meters) michael gtr tune1.pclr Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 24, 2020 Author Report Share Posted March 24, 2020 I took the car out before, was at warm operating temps (car was sitting for an hour or so) went to drive off and came to a stop and the car was hunting erratically between 2000-4000rpm for about 5-10mins until it got to full operating temp and then the erratic hunting stopped, during these 5-10mins of driving driveability was abit weird aswell until it went away, looking at my digital dash TPS wasn’t changing during the hunting issue, map and afrs were i have a video I’m trying to attach but it’s too large.... Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 24, 2020 Report Share Posted March 24, 2020 There are a couple of settings that look a bit odd to me but I would really want to see a log file before suggesting any changes. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 24, 2020 Author Report Share Posted March 24, 2020 Do you want a log of me driving along, changing gears to replicate the high rpm between gear changes ? i will get some tomorow morning for you anything specific you require let me know thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 24, 2020 Report Share Posted March 24, 2020 Just a normal drive with some of these idle problems captured will do. MichaelR32GTR 1 Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 25, 2020 Author Report Share Posted March 25, 2020 driving today to get some logs, I noticed on the digital dash if TPS is at 5 or 6, the high rpm between gear changes is very evident, if TPS is at at 4 its much better, attached is a log from today,,, log1.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 25, 2020 Report Share Posted March 25, 2020 Ok, the first thought I have is throttle position is not tracking target well, it is quite slow. Try increaseing your E-throttle proportional gain from the current 6.0 to 8 (drop back to 7 if it becomes unstable) and and try increaseing the integral to 0.1 or 0.15. I think I would also remove 0.5% from these cells in the idle base pos table to make it look like this: Then do another log. It will likely still need a few other changes. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 25, 2020 Author Report Share Posted March 25, 2020 Thankyou i will change to above mentioned settings and report back Friday or Saturday on how it goes thanks, much appreciated Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 27, 2020 Author Report Share Posted March 27, 2020 ok so drove the car today, a little better overall, I don't mind a very small amount of rev hang between gears but it still needs more work, also after a 30min drive I gave it a little hit in second gear and came to a stop and revs were hunting, then rev hang between gears was worse, I captured this briefly in the attached log, changed made was: proportional gain- 7 integral gain- 0.145 and in idle base position table I changed setting from 70 ECT to 140 ECT to 0 as you mentioned above thanks log11.llg Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 27, 2020 Author Report Share Posted March 27, 2020 FYI looking at my old vipec v88 settings before I changed to link fury and the electronic throttle settings were proportional gain: 5.00 integral gain: 0.145 derivative gain: 25.00 never had any issues in the past with the vipec Any other recommendations as to what can be changed to get rid of this annoying issue, please let me know thanks admin ! Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 27, 2020 Author Report Share Posted March 27, 2020 I tried the above settings from my old vipec ecu and that was horrible currently at P: 8 I: 0.145 D: 40% drives much better there i notice when I come to a stop and revs increase sometimes, TPS is showing 6 sometimes even 7 but my e throttle 1 target at that rpm is 5 Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 27, 2020 Report Share Posted March 27, 2020 Ok, the throttle control is much better now. I want to try making the first row of your E-throttle table into something a bit more normal now. Can you change the red cells to match this example and do another log. It may stall a bit more often with this adjustment but we will probably be able to fix that later with idle ignition. Can you also change the idle speed control RPM lockout to 300RPM. These changes may not improve things initially but since Im not there to see & feel it how it responds live, I need you to try this stuff so I can look at the logs to see if we are heading in the right direction or not. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 27, 2020 Author Report Share Posted March 27, 2020 Thanks for that i think we are headed in the right direction I just made the changes and saved I will go for a drive tomorow morning and do a log and report back so far changes are promising, thanks once again ! Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 28, 2020 Author Report Share Posted March 28, 2020 good day I made the above changes and got a log, man this high idle between gear changes and neutral is bad also there was no stalling with the changes made see log after that log I changed proportional gain to 10 to see how it would behave and its better but still there current settings in that log are: P: 10.00 I: 0.145 D: 40.00 could a vacuum leak on the intake plenum cause this or running a MAP sensor won’t cause any issues like air flow meters would ? log4.llg Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 28, 2020 Author Report Share Posted March 28, 2020 TPS is never consistent when it behaves (rarely its at around 4) when it’s causing all sorts of high inconsistent idle it’s up to around 7 and extreme cases 8 Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 28, 2020 Report Share Posted March 28, 2020 Can you attach the latest tune as some of the logged values suggest some of the changes I have suggested earlier havent been made. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 28, 2020 Author Report Share Posted March 28, 2020 sure thing this is current tune file michael gtr tune1-1.pclr Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 28, 2020 Author Report Share Posted March 28, 2020 log from late this afternoon log6.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 28, 2020 Report Share Posted March 28, 2020 Can you update to the latest firmware (5.6.7). The E-throttle ISC offset is not working how I expect it to, I remember there was a bug related to that sometime ago that was fixed so this may be related. Can you do another log after doing that, with no other changes. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 28, 2020 Author Report Share Posted March 28, 2020 Sure thing uploading now and will test with no changes tomorow thankyou again Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 29, 2020 Author Report Share Posted March 29, 2020 so i did the firmware update to 5.6.7 and went for a drive, problem solved !! no more hunting idle, no more high random idle, just nice perfectly smooth gear changes and I can actualy enjoy driving the car again ! I have a log to show you (LOG8) that its all fixed, but I did before the log change Proportional Gain to 7, yesterday it was at 10 while testing, both 10 and 7 had identical results with perfect driveability today second log (LOG9), Idle when coming to a stop is a abit low (used to be 1100ish rpm before now sometimes drops under 1000) and hunts alittle then eventualy settles should I put all settings back to how they were originaly before we made changes ? thanks again !! log8.llg log9.llg Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 29, 2020 Report Share Posted March 29, 2020 Can you try the E-throttle target like this: Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 29, 2020 Author Report Share Posted March 29, 2020 Yeh will change to those settings tomorow would a lower number in the top row mean lower idle rpm ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 29, 2020 Report Share Posted March 29, 2020 29 minutes ago, MichaelR32GTR said: would a lower number in the top row (for idle) mean lower idle rpm ? It looks like it needs about 3.3% TP to hit the normal 1050RPM idle (with fan on), but with the current table it was pulling 4.4% from the target table, +0.5% for the fan step, so the closed loop trim was pulling -1.6% out to acheive the idle target. When you drive off this CL trim is stored so that next time you enter idle conditions the throttle should be sitting in a position that is somewhere close to where it needed to be to achieve the correct idle last time. I suspect this -1.6% trim when it is entering idle conditions is possibly contributing to the dip below target when coming to a stop. I might be wrong but you usually need to experiment with a few variables to see where the main influence is coming from. We may end up having to increase those top left hand cells back to closer to were they where but its best not to change too much at once. Also, just noticed the ISC proportional gain is quite low, can you bump that up to 1.0 as well. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted March 30, 2020 Author Report Share Posted March 30, 2020 1050 seems low for this engine and cams and idle abit ruff sometimes when it’s at 1150 it is perfectly smooth and generally more happy what changes would need to be made to lift idle 100rpm from where it was in the software Quote Link to comment Share on other sites More sharing options...
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