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Re: DBW idle control, rpm dips below idle speed on transit to idle

Posted: Mon Dec 18, 2017 7:12 pm
by Mattias
HaltechMatthew wrote:Nope. Goes to Base Duty + Long Term Correction + Decel Offset when you lift off the throttle.


Thanks, that is clear but i remember idle output going to Min Output when clutch is engaged under those conditions? Wish I made a log but will have to check it again when Spring arrives to this side of the planet :wink:

BR,
Mattias

Re: DBW idle control, rpm dips below idle speed on transit to idle

Posted: Tue Dec 19, 2017 3:59 pm
by SONofSUN
Thank you all for the help. I get it running much better now. No more stalling. Attached are map and a log file for the parameters I used. I will also clean the throttle body today to make sure everything is ok there.

Re: DBW idle control, rpm dips below idle speed on transit to idle

Posted: Sat Mar 06, 2021 7:13 am
by boXXer
Hi guys, bit of a thread bump! I have EXACTLY the same problem on my LS3 480 crate motor (hot cam), Car drives quite nice (for a base map) and ive done a few miles now. When the car is fully warmed (does not do it when cold), if im driving and coming to say a junction, or roundabout on overrun, once i dip the clutch the car will either stall completely, or hunt so bad that it will drop to 500rpm, then rev right upto 2000 rpm and so on, until you touch the throttle or hold it open until it can stabilize. Any setting i can take a look at?

How did you get on with your idle in the end?
Thanks

Re: DBW idle control, rpm dips below idle speed on transit to idle

Posted: Tue Jun 08, 2021 5:43 pm
by SONofSUN
boXXer wrote:Hi guys, bit of a thread bump! I have EXACTLY the same problem on my LS3 480 crate motor (hot cam), Car drives quite nice (for a base map) and ive done a few miles now. When the car is fully warmed (does not do it when cold), if im driving and coming to say a junction, or roundabout on overrun, once i dip the clutch the car will either stall completely, or hunt so bad that it will drop to 500rpm, then rev right upto 2000 rpm and so on, until you touch the throttle or hold it open until it can stabilize. Any setting i can take a look at?

How did you get on with your idle in the end?
Thanks


Could not solve it. I have moved the engine to another car and still working of fitting the engine. Will feedback the issues again.