Seems like an odd one. I can't achieve (in a good way) the rolling idle I want (1k rpm). I can easily achieve any stationary idle I want (within reason). I set the stationary idle using the method from the help file and that works as it should.
I say I can't achieve it "in a good way" because I find I can achieve it if I drastically reduce the idle duty cycle. Right now at 2 clicks below normal the rolling idle sits at 1,150 rpm. Each move in either direction on the duty cycle seems to be worth about +- 50-75 rpm in moving idle result. So if I reduce the duty cycle by 2 more clicks then yes I can achieve my 1k rpm rolling idle but then the stationary idle suffers.
No vacuum leaks, I've already gone through cans of carb cleaner to prove that and with the IAC unplugged it's not hard to achieve the base idle suggested in the manual.
I'd like my duty cycle to be at "Normal" because the stationary idle seems better there, even better at 1 click above normal, and again with the duty cycle set at normal or above stationary idle hits the target spot on. But then a problem comes in with closed loop operation stops working during the resultant high rolling idle because then overrun fuel cutoff and resume start cycling on and off repeatedly because in rolling idle I'm off the throttle and the too high rolling idle is right at the threshold for fuel resume and this cycle prevents closed loop from activating again until I come to a stop and it goes to stationary idle or I get back on the gas to cruise. I can raise the initial overrun resume rpm to work-around this but that seems like a rigged solution.
I've also played around with the main ignition maps setting timing to 16 for all the cells involved and their neighbors. This did not change the results. I also experimented with a little less timing and still no change in the rolling idle. In the attached cal the timing is back to normal, just letting you know.
b18c1
AEM CAI with a cutout in the bumper so wind goes straight to the filter (Maybe this is forcing more air through the bypass when moving and the cause? The rolling idle doesn't vary much with speed though)
ITR TB (No FITV)
Skunk2 IM
Skunk2 Tuner 1 Cams set at 0,0
DC 4-1 Header
Crower Springs & Retainers
The rest of the internals stock
Prelude 290cc injectors
Car runs spot on aside the rolling idle issue.
Can't achieve desired rolling idle
Can't achieve desired rolling idle
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Re: Can't achieve desired rolling idle
The idle when still moving will be higher than when stationary. This is completely normal.
Re: Can't achieve desired rolling idle
Idle speed vs Coolant temp (moving):
https://www.hondata.com/help/smanager/i ... espeed.htm
So these params should basically be ignored / have no effect?
https://www.hondata.com/help/smanager/i ... espeed.htm
So these params should basically be ignored / have no effect?
Re: Can't achieve desired rolling idle
I don't know of anyone else having issues with this. Unless there is proof that there is a software problem, then there is nothing I can do.
Re: Can't achieve desired rolling idle
In your car if you set rolling idle either higher or lower from where you have it now does it honor the change? Does it honor your current rolling idle setting?