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Old 06-17-2012, 07:12 PM   #1
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Default idle issues with A/C

I'm just getting off the ground with my MS setup. Driveability is great, but idle could be a lot better. Idle without the AC is not terrible, but with AC is a mess. Oscillates and eventually dies out unless I play with the throttle.

I read through this: http://www.msextra.com/doc/ms3/tmp/2Idle_Control.html

Using that as a guide, I tried playing with the proportional and integral controls but didn't make any headway.

Any tips? I've attached a short log of idle with AC.
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File Type: msl ac.msl (261.1 KB, 110 views)
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Old 06-17-2012, 07:23 PM   #2
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Try adding more duty through the A/C idle up duty menu. Also post your msq.
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Old 06-17-2012, 07:31 PM   #3
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msq is attached, thanks
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File Type: msq Allen10.msq (84.4 KB, 59 views)
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Old 06-17-2012, 07:36 PM   #4
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here is the current settings for ac duty
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idle issues with A/C-ac-duty.jpg  
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Old 06-17-2012, 09:02 PM   #5
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I have not yet played with the idle outputs, so I have never done what you're asking about. But one thing jumps out at me:
In the chart you posted things start happening as of approx. 130*C. You should rarely get to that temperature at all. I believe our stock thermostats are set at 190F, that's 88*C.
Maybe the chart has *F and *C confused?
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Old 06-17-2012, 09:56 PM   #6
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That is an interesting comment. I'll have to go and look at settings, but I just pulled that picture when the computer was not hooked up to the car. I don't know if that has any effect on that readout?
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