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Post by corymck89 on Apr 6, 2016 22:46:47 GMT -5
I am having a hanging idle issues, it is consistent so I don't believe its the iac. I have included a datalog of the idle issue and my current tune.
also if someone gets the chance and has my tune open could u check over my warm up enrichment ( I changed some values) after I added 83lb/hr injectors it was adding to much fuel.
sorry for the noob questions I'm reading and researching as much as possible.
thanks in advance!!
current set up:
ms2 sequential
2.3 turbo
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Post by Stinger on Apr 6, 2016 23:29:29 GMT -5
Your idle speed tracks perfectly with commanded IAC duty. This means it's doing exactly what the tune is telling it to do.
Are you referring to the 5 seconds after warm startup that it holds at 1650 rpm before IAC duty starts to drop and rpm drops with it as a hanging idle?
Your idle VE values being in the mid teens while still being rich (11's) would indicate you've got a settings error somewhere in the fueling/injector settings.
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Post by corymck89 on Apr 6, 2016 23:38:34 GMT -5
I thought something was off with the fuel table or something, after i installed the injectors its been i real struggle getting the VE table back in shape. A friend told me that the VE table shouldn't of changed that tuner studios would interpret the table with the size of injector? Im not sure how correct this is but the car wouldn't run without changing the table.
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Post by corymck89 on Apr 6, 2016 23:40:32 GMT -5
And yes i am referring to the 5 sec hang time, is it normal for everytime i stop or come to a red light it idle high for 5 sec befor dropping?
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Post by Stinger on Apr 7, 2016 0:16:32 GMT -5
Your friend is correct that if the injector characteristics were accurate with the old injectors, and with the new injectors, little to no change should need to be done to the fuel table.
The most likely problem is injector dead time as this is a setting that only really effects low engine speeds and that appears to be where your tune is out of whack.
No, it shouldn't hang for 5 seconds coming to a stop. That's not what your log showed though, it showed a warm start. Does it hang for 5 seconds any time you bring it to idle or just under those two circumstances?
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Post by corymck89 on Apr 7, 2016 6:50:56 GMT -5
Anytime
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Post by wesk on Apr 7, 2016 12:07:36 GMT -5
I will look at file tonight. Is your file set to "use initial values" or "use last value?"
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Post by Stinger on Apr 7, 2016 13:52:35 GMT -5
It's set to use initial value table.
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Post by corymck89 on Apr 7, 2016 14:02:39 GMT -5
Thanks Wesk! And thanks Stinger, im at work not sure without it in front of me.
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Post by wesk on Apr 7, 2016 20:10:01 GMT -5
Yank about 20% duty from the entire PWM Idle initial values table. Just highlight table and subtract 20%.
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Post by corymck89 on Apr 7, 2016 20:54:25 GMT -5
Thanks! Also a friend and stinger said i shouldn't of needed to adjust my ve fuel table after i went from 36lb/hr to 83lb/hr but i had to change it alot any insight on why that was? I have did save my fuel table befor i changed it
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Post by wesk on Apr 8, 2016 5:39:11 GMT -5
When injectors get large, deadtime (and errors in deadtime) affect the tune alot at low loads.
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Post by corymck89 on Apr 9, 2016 10:41:02 GMT -5
My injector dead time @13.2v (ms) is 0.650
And battery voltage correction (ms/v) 0.090
Witch direction should i move with these or any idea on where to start?
Should i restore my old fuel table (befor injector swap) and play with the dead time until it gets close to the old table?
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Post by wesk on Apr 9, 2016 10:49:29 GMT -5
It depends on which injectors.
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Post by corymck89 on Apr 9, 2016 10:52:02 GMT -5
Ahh ok i dont have the part number handy but they are, low impulse 83lb/hr holley brand injectors.
Not sure if this is the info your after
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