MichaelR32GTR Posted October 15, 2023 Report Share Posted October 15, 2023 For a while now (forever pretty much lol) low rpm cruise like in a car park or a street etc every time I slightly get off the throttle I get bad jerking/bucking and looking at my digital dash I see ignition values vary widely when it does it. having a look in my idle ignition control settings I think these values are too high and it thinks it’s in idle while cruising causing these issues idle ignition control: on map lockout: 100kpa rpm lockout: 2500rpm (seems high) ? speedlockout: 40kmh (seems high)? TP/AP lockout: 0.4% do these rpm and speed settings seem high, should they be lower ? Any tips on what it should be car is a 32 gtr - link g4+ fury, etc Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 15, 2023 Report Share Posted October 15, 2023 Yeah both RPM and sped lockout are higher than typical, although I find these do need to vary quite a bit for driver style. Make sure there is a non-driven wheel speed source set up for the speed lockout. But from your description I would say your jerking issue sounds more like overrun fuel cut incorrectly set up rather than idle ign. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted October 16, 2023 Author Report Share Posted October 16, 2023 Yeh I have a driven and non driven wheel active I will check the overrun fuel cut settings and report back Thankyou Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted October 16, 2023 Author Report Share Posted October 16, 2023 Ok so looking at my overrun fuel cut settings I have the following, not sure if these are part of the issue… fuel cut mode: on TP/AP threshold: 0.3% activation delay: 1.5s torque reduction/introduction time: 2.0s ignition retard: -10.0 then overrun deactivation table, deactivations rpm and engine coolant temp table, everything from -30 degrees to 140degrees has 2000rpm in each box Quote Link to comment Share on other sites More sharing options...
Adamw Posted October 16, 2023 Report Share Posted October 16, 2023 Just temporarily turning ORFC off will tell you if it is that or not. Quote Link to comment Share on other sites More sharing options...
MichaelR32GTR Posted October 18, 2023 Author Report Share Posted October 18, 2023 Will give that a go and report back over the weekend thanks 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.