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Explanation needed for "Min Coolant Temp for Closed Loop"???

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Old Dec 21, 2006 | 10:28 AM
  #1  
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MR
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Explanation needed for "Min Coolant Temp for Closed Loop"???

Hi,

Can someone advise what this "Min Coolant Temp for Closed Loop" in the stock ecu parameter is all about?

Thanks in advance!
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Old Dec 21, 2006 | 11:36 AM
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From: Butthole, MA
When your car is cold, it uses the open loop map ( no trimming)
When the car is warm it adjusts or "trims" when it is in closed loop.

Part of what determines closed and open loop is the coolant temp.

However, when you are really gunning the car, it goes into open loop.
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Old Dec 21, 2006 | 01:13 PM
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From: CA
Just to add to the explanation....

You would use this if you wanted to run your car in open loop for some reason, like to get your open loop fuel map at idle or low load cells scaled correctly for stoich, for example.

You would simply enter a temperature that you would not reach, and thus, you would never enter closed loop. You would always be in open loop.


Eric
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Old Dec 21, 2006 | 04:59 PM
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Hi Eric,

Thanks for the explanation...

O...and Merry Christmas to u & all!!!!



Originally Posted by l2r99gst
Just to add to the explanation....

You would use this if you wanted to run your car in open loop for some reason, like to get your open loop fuel map at idle or low load cells scaled correctly for stoich, for example.

You would simply enter a temperature that you would not reach, and thus, you would never enter closed loop. You would always be in open loop.


Eric
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Old Dec 21, 2006 | 07:06 PM
  #5  
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From: Oak Creek, WI
I had to do this very thing to figure out my STFT so I had the coolant temp set to 220 or so. Now that the trims are good I lowered it back down to 85 so I can still get some sort of startup enrichment.

Hopefully if Ecuflash ever gets updated again they can find the closed loop maps. Tuning would be a lot easier for me. But the best I can do for now is just playing with the Injector scaling and the latency values.
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