Throttle hang and the Idle Stepper Table
#361
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I don't think this is the only table that affects it. I agree that you can get rid of it with this table, more than likely at the expense of your idle. I have made adjustments to other IX idle tables that affected my throttle hang, with no changes to the stepper table. I think it's more of a correct combination of values in all the idle tables combined. A while ago, I had near perfect idle with next to no hang and no BISS adjustment. I changed it though thinking I could make it a little better, and failed. I didn't save them, nor do I remember what they were. I also can't speak of how they would have worked in the winter/fall.
Last edited by biggie5252; Oct 9, 2008 at 10:22 AM.
#362
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I don't think this is the only table that affects it. I agree that you can get rid of it with this table, more than likely at the expense of your idle. I have made adjustments to other IX idle tables that affected my throttle hang, with no changes to the stepper table.
#364
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desired idles (n) (d)
actual desired idle rpm
(mivec and ig timing 1k rpm's and 0 40 loads)
at that point I had hang.
I will update if I find a good solution. Hard to road race when car gives you extra 3 second "bursts" of throttle into a corner Hold on haha ( or pray?)
#366
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i changed everything idle related back to stock settings. I keeped only ignition timing and mivec settings (9*) and 0 advance idle cells. seems to be mostly gone with you far "bottom right" stepper table (changed bottom 6 cells to 60). will report back after track day saturday.
#368
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It went well. I think no more throttle hang, with above mentioned settings. Ill post pics when I am able to. um some video of track day in the south forum. Link:
https://www.evolutionm.net/forums/sh...d.php?t=374076
https://www.evolutionm.net/forums/sh...d.php?t=374076
#369
Evolved Member
iTrader: (30)
Well I have been pulling an ostrich for the last 2 years and have been ignoring the fact that there is idle hang. I dont have any issues and I hadnt seen any until this week. So I read all this thread and a few others and I while I had figured out the coolant on my own, I think the other axis is RPM but RPMtarget not how it was. Looking at my logs it seems to correspond to this...definitely not load. It also seems as you gents are aware that it just uses 41*C as the last column and doesnt pull a timing table trick and interpolate past and spiral down. It just locks in on that table. Here is what I have as of today though and it all matches target RPM as listed in Evoscan (log to coolant to ISC steps). I'll post the corresponding log up after lunch.
aaron
aaron
#370
Evolved Member
iTrader: (17)
Well I have been pulling an ostrich for the last 2 years and have been ignoring the fact that there is idle hang. I dont have any issues and I hadnt seen any until this week. So I read all this thread and a few others and I while I had figured out the coolant on my own, I think the other axis is RPM but RPMtarget not how it was. Looking at my logs it seems to correspond to this...definitely not load. It also seems as you gents are aware that it just uses 41*C as the last column and doesnt pull a timing table trick and interpolate past and spiral down. It just locks in on that table. Here is what I have as of today though and it all matches target RPM as listed in Evoscan (log to coolant to ISC steps). I'll post the corresponding log up after lunch.
aaron
aaron
#371
EvoM Staff Alumni
iTrader: (16)
Well I have been pulling an ostrich for the last 2 years and have been ignoring the fact that there is idle hang. I dont have any issues and I hadnt seen any until this week. So I read all this thread and a few others and I while I had figured out the coolant on my own, I think the other axis is RPM but RPMtarget not how it was. Looking at my logs it seems to correspond to this...definitely not load. It also seems as you gents are aware that it just uses 41*C as the last column and doesnt pull a timing table trick and interpolate past and spiral down. It just locks in on that table. Here is what I have as of today though and it all matches target RPM as listed in Evoscan (log to coolant to ISC steps). I'll post the corresponding log up after lunch.
aaron
aaron
#373
Whenever i get throttle hang i can distinctly watch it stop the injectors around 3100rpm. There has to be something in the code, other than this table, that for some reason tells the computer to actually stop the injectors. I think whatever we do is a bandaid until we get someone to truly look at the code and see whats going on.
My car has done this since day one and no mods so it is something programmed in
Downshifting and slowing down for a turn is definitely not as efficient with throttle hanging and speeding you up instead of engine back pressure slowing you down.
PS It is more of a delay until RPM's start dropping and the speed in which they drop versus the throttle/rpm actually hanging in my case. Maybe just a play on words and maybe it describes the situation better. Need more coffee just woke up