My OWN thread about my OWN MS3x idle "issue"
12-19-2013, 07:41 PM
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My OWN thread about my OWN MS3x idle "issue"
+1 on Ben's analysis. In this area, your spark advance is operating off your spark map. Make sure the bins in your spark map around this area are all about the same. What's happening is that spark is advancing which produces more torque and increases RPM. Your idle duty then responds to that (with lag). As the RPM decays, the reverse happens. Bottom line, you've got a negative feedback loop. Post your spark map. Should be obvious.
Thank you, thank you, thank you.
Now I'm not 100% sure but I think the MS3 has a separate idle timing or is that just a separate idle VE (?)
This idle dip has been driving me crazy - tried every closed loop setting imaginable
Last edited by poobs; 12-19-2013 at 07:41 PM. Reason: typo
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12-19-2013, 10:07 PM
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Do you guys think that these may have something to do with the issue ...
Under Start Up and Idle
Idle RPM Timing Correction Curve – RPM vs timing delta ?
Idle Advance Settings - Turns Idle Advance on/off & shows timing advance vs load
Sorry abuot the screen shots.
First time that I look at these so any clarification will be greatly appreciated
Under Start Up and Idle
Idle RPM Timing Correction Curve – RPM vs timing delta ?
Idle Advance Settings - Turns Idle Advance on/off & shows timing advance vs load
Sorry abuot the screen shots.
First time that I look at these so any clarification will be greatly appreciated
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12-20-2013, 08:00 AM
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poobs, turn idle advance off.
If you're having an rpm dip coming to idle, it could be a plethora of things. I can seriously think of about 5-6 things it could be.
start your own thread, explain the issue fully, and post datalogs and your msq exactly like Richy has done in his first post here. then we can deal with YOUR issue instead of piggybacking off another's.
If you're having an rpm dip coming to idle, it could be a plethora of things. I can seriously think of about 5-6 things it could be.
start your own thread, explain the issue fully, and post datalogs and your msq exactly like Richy has done in his first post here. then we can deal with YOUR issue instead of piggybacking off another's.
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12-20-2013, 08:49 AM
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poobs, turn idle advance off.
If you're having an rpm dip coming to idle, it could be a plethora of things. I can seriously think of about 5-6 things it could be.
start your own thread, explain the issue fully, and post datalogs and your msq exactly like Richy has done in his first post here. then we can deal with YOUR issue instead of piggybacking off another's.
If you're having an rpm dip coming to idle, it could be a plethora of things. I can seriously think of about 5-6 things it could be.
start your own thread, explain the issue fully, and post datalogs and your msq exactly like Richy has done in his first post here. then we can deal with YOUR issue instead of piggybacking off another's.
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12-20-2013, 11:59 AM
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Well, no matter what is controlling spark advance in the idle region, it helps to keep the advance stable so that PW to the idle control valve is the only thing affecting RPM. The only exception to this might be a spark bump at the extreme low end to keep the engine from bogging.
KISS or die.
KISS or die.
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12-20-2013, 12:15 PM
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well it's not tuned.
mine was better than stock, even with a/c, headlights, and a subwoofer booming.
adaptive timing is really amazing. the PID code gets the idle valve close, then the MS controls the timing to keep it on target instead of manipulating the idle valve. It's much improved and locking the timing negates this feature.
mine was better than stock, even with a/c, headlights, and a subwoofer booming.
adaptive timing is really amazing. the PID code gets the idle valve close, then the MS controls the timing to keep it on target instead of manipulating the idle valve. It's much improved and locking the timing negates this feature.
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12-20-2013, 01:52 PM
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Brain
My tune is based on yours. My current spark table increases timing right away so it lacks the low timing value area that you guys mention - I still have to modify it
Far as I know timing advance at idle is turned "on" as is the Idle RPM correction (on the same screen )
What do you guys mean by locked on ?
Should I disable it ?
Thanks guys
My tune is based on yours. My current spark table increases timing right away so it lacks the low timing value area that you guys mention - I still have to modify it
Far as I know timing advance at idle is turned "on" as is the Idle RPM correction (on the same screen )
What do you guys mean by locked on ?
Should I disable it ?
Thanks guys
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12-20-2013, 02:59 PM
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Heres a log
Just driving around sedately
It did not do anything drastic but feels clunky between shifts and a slight surge on light acceleration.
Feels clumsy ..
Any insight is better than nothing thanks again
Just driving around sedately
It did not do anything drastic but feels clunky between shifts and a slight surge on light acceleration.
Feels clumsy ..
Any insight is better than nothing thanks again
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12-20-2013, 03:25 PM
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Here's some food for thought.
When I tap the gas pedal - no load from idle- it returns to idle very well but when I put a load on the motor the fun begins.
So it would seem that depending on what the motor is doing load wise when I step on the clutch it will recover nicely or dip.
What setting controls the above ?
When I tap the gas pedal - no load from idle- it returns to idle very well but when I put a load on the motor the fun begins.
So it would seem that depending on what the motor is doing load wise when I step on the clutch it will recover nicely or dip.
What setting controls the above ?
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