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Long iddle upper after cold stard

Old May 6, 2020 | 10:53 AM
  #1  
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Long iddle upper after cold stard

Hi !

i search to solve a little problem. after cold crancking, during 2mn (!) my iddle is very high (2500 to 1500 rpm) and, in one step, it's good :


i run with tephra V7 96530706 (evo8 EUDM) E85

have you any idea to solve that ?

cheers
Eric (excuse me if it'snot very precise, i'm french.....sorry lol)
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Old May 6, 2020 | 11:40 AM
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I think this thread will be really helpful for you in dealing with this issue. I would also suggest doing a boost leak test to rule out the possibility of a vacuum leak.

https://www.evolutionm.net/forums/ec...cv-tables.html

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Old May 6, 2020 | 01:07 PM
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Originally Posted by Biggiesacks
I think this thread will be really helpful for you in dealing with this issue. I would also suggest doing a boost leak test to rule out the possibility of a vacuum leak.

https://www.evolutionm.net/forums/ec...cv-tables.html
Thanks ! I've already see this thread and i think i must check iscv setup but i don't know what map control that and why the up iddle duration is so long....

To be honnest, i don't tjink a leak do that...the problem is here since the e85 tune and tephra v7 conversion by a mapper before i sell the car . Also, it run perfectly and ive never trouble with it...😉
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Old May 6, 2020 | 01:12 PM
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It's table #3 "ISCV Post-Cranking Initial Demand Adder"

The decay timers aren't a part of that thread, I'm not sure what thread they are located in, but basically the colder the engine is the longer it takes to decay down. I don't think the decay timer is your issue though, you probably just need to reduce demand in table 3 corresponding to your starting temperature.
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Old May 6, 2020 | 09:15 PM
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it is normal to be idling higher during cold start.... or what am I misunderstanding in your question?

is this after your e85 tune? You can check with the tuner but it does make sense since E85 is harder to ignite and especially when cold that you would want to give it more so the engine actually idles until it warms up as evident in the logs.
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Old May 7, 2020 | 12:17 AM
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Question

Originally Posted by Biggiesacks
It's table #3 "ISCV Post-Cranking Initial Demand Adder"

The decay timers aren't a part of that thread, I'm not sure what thread they are located in, but basically the colder the engine is the longer it takes to decay down. I don't think the decay timer is your issue though, you probably just need to reduce demand in table 3 corresponding to your starting temperature.
i'm agree with you but i've not definition in xml tephra 9650706 for theses maps.... :-( but i'm sure the issue is here ;-)

it is normal to be idling higher during cold start.... or what am I misunderstanding in your question?

is this after your e85 tune? You can check with the tuner but it does make sense since E85 is harder to ignite and especially when cold that you would want to give it more so the engine actually idles until it warms up as evident in the logs.
yes, it's normal to up at cold iddle but i think it's too long (2 minutes ) and too high rpm (2500 to 1500 after 2mn). the log is in centrigade units for temp coolant : at cranking the cool temp is 58°F on log. i think 1700/1800 rmp during 30s should be correct. for a very cold cranking, 2500 rpm why not but nnot a 58°F (30°F why not)

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Old May 7, 2020 | 08:16 AM
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Originally Posted by RicouSRT
i'm agree with you but i've not definition in xml tephra 9650706 for theses maps.... :-( but i'm sure the issue is here ;-)
Oh IC, that is a problem. Have you tried searching the lancerregister forum for the xml? If im not mistaken 965 is a EDM rom so you might have more luck over there.
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Old May 8, 2020 | 03:18 AM
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Originally Posted by Biggiesacks
Oh IC, that is a problem. Have you tried searching the lancerregister forum for the xml? If im not mistaken 965 is a EDM rom so you might have more luck over there.
i don't find any more but i've perhaps something to test

i think some modif on iscv table idlle lock up and ISCV CTS Adder "1 could close trouble..i'll test that and i'll tell you ik it's ok ;-)
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