Can't get dashpot adder to work
#1
Can't get dashpot adder to work
Short story: I get a bit of idle drop when entering idle. Occasionally it's pretty bad and it almost stalls. Once CL idle kicks in, it's fine. I checked the logs and the dashpot adder didn't seem to do anything. I raised it from around 3 to 10% to make sure it would be noticeable - still nothing. I got some input from Reverant and tried setting the Min duty for PID to around 20, close delay to 0. Still nothing (see log).
Any ideas on what else I could try?
Thanks,
- Tom
Any ideas on what else I could try?
Thanks,
- Tom
#3
Boost Czar
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Your idle valve barely moves at all. it pretty much stays locked at 35.5% I think you have way too much I value.
But if anything, the valve should drop down to 25% when youre driving regardless, I think this might be an issue with the firmware.
But if anything, the valve should drop down to 25% when youre driving regardless, I think this might be an issue with the firmware.
#9
It does compensate with higher Idle PWM% when for example I turn on the high beam, the rear window heater etc. It also idles fine. Only idle problem is the missing dashpot adder, resulting in an idle dip when coming off the throttle and engaging the clutch.
What are the conditions for a "known good Idle"? I'm wondering if it doesn't acknowledge my idle as "good" and therefore doesn't apply the dashpot adder.
- Tom
What are the conditions for a "known good Idle"? I'm wondering if it doesn't acknowledge my idle as "good" and therefore doesn't apply the dashpot adder.
- Tom
#10
Boost Czar
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Your log showed a non functioning idle value; as far as i can tell, it's not working at all. It doesn't close when on the throttle, it doesn't add dashpot when you lift, it doesn't react to PID, it doesn't do jack **** but sit there at 35% PWM. Does that makes sense?
Without seeing a log that shows the idle value actually doing something, I have to assume there's a bigger issue than just "no dashpot," because as far as I see it, you have no idle code.
Without seeing a log that shows the idle value actually doing something, I have to assume there's a bigger issue than just "no dashpot," because as far as I see it, you have no idle code.
#11
Your log showed a non functioning idle value; as far as i can tell, it's not working at all. It doesn't close when on the throttle, it doesn't add dashpot when you lift, it doesn't react to PID, it doesn't do jack **** but sit there at 35% PWM. Does that makes sense?
Without seeing a log that shows the idle value actually doing something, I have to assume there's a bigger issue than just "no dashpot," because as far as I see it, you have no idle code.
Without seeing a log that shows the idle value actually doing something, I have to assume there's a bigger issue than just "no dashpot," because as far as I see it, you have no idle code.
- Tom
#13
I lowered the P% and I% by a fifth to make sure the Idle RPM and PWM% would be stable, then did another log (attached along with the .msq).
No luck.
The idle dip is worst when down-shifting before engaging the clutch (621 RPM at 1059.4s).
Strange thing going on at 830s - 832s and again at 1005s - 1015s. The Idle PWM% drops to 19.9 (= Min. Duty for PID). It doesn't have an effect as it didn't happen during idle - just thought it was curious.
I turned on the heater fan and rear window heater at the end of the log and the PWM% went up by 6 points to deal with it.
- Tom
No luck.
The idle dip is worst when down-shifting before engaging the clutch (621 RPM at 1059.4s).
Strange thing going on at 830s - 832s and again at 1005s - 1015s. The Idle PWM% drops to 19.9 (= Min. Duty for PID). It doesn't have an effect as it didn't happen during idle - just thought it was curious.
I turned on the heater fan and rear window heater at the end of the log and the PWM% went up by 6 points to deal with it.
- Tom
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