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EVO IX 8859 comes out of open loop at idle

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Old Feb 5, 2018, 05:03 AM
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EVO IX 8859 comes out of open loop at idle

Hi all,

Something that is starting to get on my nerves, I am trying to run a lean idle and have all of the open loop load tables set to 0 in the idle areas.

When I start the car, it will idle at my target AFR, if I blip the throttle it will then idle back down and somehow go into closed loop and sit at 14.7. It will not go lean again until a reflash.

I had the idle where I wanted it for a few days with no changes, then this started happening for no reason, now I cannot get it to stay in open loop.

Any ideas?
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Old Feb 5, 2018, 05:28 PM
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The car starts in open loop and does not change to closed loop until the coolant temp hits 84 deg F. Open Loop Throttle #1 & 2 also need to be set to 0% at idle RPMs. The logic used for the transition to open loop is coolant temp > 84 deg F and either load or throttle exceeds the value in the respective open loop table.

Last edited by cdrinkh2o; Feb 5, 2018 at 05:35 PM.
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Old Feb 5, 2018, 05:50 PM
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Originally Posted by cdrinkh2o View Post
The car starts in open loop and does not change to closed loop until the coolant temp hits 84 deg F. Open Loop Throttle #1 & 2 also need to be set to 0% at idle RPMs. The logic used for the transition to open loop is coolant temp > 84 deg F and either load or throttle exceeds the value in the respective open loop table.
You are correct. I have been confusing open/closed loop for some reason when looking at the throttle tables. I will switch them to 0.

Thank you.
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