KManager 4.3.5.0
KPro4 PRB ECU
K24/K20 swapped 2004 S2000
Magnus Sheet Metal K-Series Intake Manifold
90mm KTuned TB
Injector Dynamics 725
Overrun cutoff manifold pressure set to 12 KPa on low/high cam
My first issue is that "Disable fuel over-run cutoff delay" doesn't seem to work. I've got the box checked, and the ECU has been flashed several times with it checked before these logs were taken. This can be seen in "2018-06-18_4(Overrun Cutoff Issue).kdl"
Second issue I'm having is that it takes almost 1.5 seconds (starting from when I press on the gas pedal) for the injectors to turn back on after an overrun. I'm not seeing anything popping out at me in KManager that would allow me to tweak the conditions to restart the injectors. Can be seen in both logs I attached.
Overrun cutoff Issues
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- Posts: 41
- Joined: Fri Mar 14, 2014 7:54 am
Overrun cutoff Issues
- Attachments
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- 2018-06-18_4(Overrun Cutoff Issue).kdl
- (222.26 KiB) Downloaded 170 times
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- 2018-06-19_1(Overrun Cutoff Issue).kdl
- (151.79 KiB) Downloaded 180 times
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- 06-18.kal
- (165.49 KiB) Downloaded 173 times
Re: Overrun cutoff Issues
1) it is not reaching 12 kpa to shut them off.
2) This is probably because it is decelerating and not with the larger throttle body there is not much of a change in vacuum when this is occurring. That would be my best guess.
2) This is probably because it is decelerating and not with the larger throttle body there is not much of a change in vacuum when this is occurring. That would be my best guess.
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- Posts: 41
- Joined: Fri Mar 14, 2014 7:54 am
Re: Overrun cutoff Issues
Hello, Thanks for the response.
1) I reflashed my ECU yesterday with an Overrun Cutoff of 18 kpa. There still looks to be an exact time of .5 seconds delay before it goes into overrun, even when going below 18 kpa. This can be seen in the log I attached.
2) Is there anyway you could let me know the exact conditions required to come out of overrun on kpro? I'm trying to smooth out the huge jerk in power I get after getting back on the accelerator after overrun. Is this based on the TPS or MAP sensors? In my logs, I tried several different ways of getting back on the accelerator to see if I can isolate the conditions. For sure, I have ruled out there being any kind of delay like there is when going into overrun (this is regarding the 1.5 seconds in my initial post). I did this by slamming on the accelerator and it basically instantly came out of overrun (seen @ 1:06). The times where I slowly got back on it, I can't definitively say if it was going past a set MAP/TPS value or if it had to do with the rate of change. But, if I were to take a guess, it almost looks like there is a hard coded value of 25 kpa where it comes out of overrun. This can be seen @ 0:49, 1:12, 1:17 and 1:23. Any way to tweak this value if that's the case?
1) I reflashed my ECU yesterday with an Overrun Cutoff of 18 kpa. There still looks to be an exact time of .5 seconds delay before it goes into overrun, even when going below 18 kpa. This can be seen in the log I attached.
2) Is there anyway you could let me know the exact conditions required to come out of overrun on kpro? I'm trying to smooth out the huge jerk in power I get after getting back on the accelerator after overrun. Is this based on the TPS or MAP sensors? In my logs, I tried several different ways of getting back on the accelerator to see if I can isolate the conditions. For sure, I have ruled out there being any kind of delay like there is when going into overrun (this is regarding the 1.5 seconds in my initial post). I did this by slamming on the accelerator and it basically instantly came out of overrun (seen @ 1:06). The times where I slowly got back on it, I can't definitively say if it was going past a set MAP/TPS value or if it had to do with the rate of change. But, if I were to take a guess, it almost looks like there is a hard coded value of 25 kpa where it comes out of overrun. This can be seen @ 0:49, 1:12, 1:17 and 1:23. Any way to tweak this value if that's the case?
- Attachments
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- 2018-06-19_2(Overrun Cutoff Issue).kdl
- (1.91 MiB) Downloaded 167 times
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- 06-19.kal
- (165.49 KiB) Downloaded 150 times
Re: Overrun cutoff Issues
There is no access to these values in the software and I cannot see what these values are.
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- Posts: 41
- Joined: Fri Mar 14, 2014 7:54 am
Re: Overrun cutoff Issues
What about my overrun cutoff delay issue?
Is your response confirming that it is the MAP value that brings it out of overrun?
Do you know if the IACV lets air in during overrun? If so, this might explain some of my issues. I tried using one with the KTuned 80mm setup w/IACV, but it let way too much air in to idle properly.
Is your response confirming that it is the MAP value that brings it out of overrun?
Do you know if the IACV lets air in during overrun? If so, this might explain some of my issues. I tried using one with the KTuned 80mm setup w/IACV, but it let way too much air in to idle properly.
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- Posts: 41
- Joined: Fri Mar 14, 2014 7:54 am
Re: Overrun cutoff Issues
So last night I decided to make some tweeks to my knock sensitivity (I've got some loud cams) and while I was in there, I figured I would uncheck "Disable fuel over-run cutoff delay" since it didn't seem to be working any way. Looking at the logs I took this morning, I noticed there is no longer a .5 second delay before entering the overrun conditions I have set...
I'm happy I can now toggle this setting, but is this the way this check box is supposed to work? The way it's worded, I'm getting the opposite effect.
I'm happy I can now toggle this setting, but is this the way this check box is supposed to work? The way it's worded, I'm getting the opposite effect.
- Attachments
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- 2018-06-22_1(Overrun Cutoff Issue).kdl
- (3.08 MiB) Downloaded 171 times
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- 06-21.kal
- (165.45 KiB) Downloaded 156 times
Re: Overrun cutoff Issues
That's very peculiar, KSeries4Life. But if it's working, that's awesome. It was a stroke of genius to uncheck that box and see what happens. haha