AC idle dips

K-Series Programmable ECU Calibration updates / downloads
Russbus
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AC idle dips

Post by Russbus »

So my idle without the AC is perfect stays at 860rpm but as soon as I turn on the AC the idle drops down to about 840rpm then if i rev the car to 1,500rpm and let off the idle dips to 570rpm almost kills the car but then it bounces back up to 840rpm can you explain to me how to adjust the short fuel trim or help me out thank you so much.
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Russbus
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Re: AC idle dips

Post by Russbus »

The calibration is the k20a r set up
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Hondata
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Re: AC idle dips

Post by Hondata »

Please post the datalog rather than a screenshot. Probably you need to adjust the amount of air that bypasses the throttle body and then look at the idle duty control.
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Russbus
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Re: AC idle dips

Post by Russbus »

here is the datalog
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k20a r ac 123.kdl
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Hondata
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Re: AC idle dips

Post by Hondata »

Fuel trims are pretty good. o2 sensor might be a little slow to respond, but that is not the problem. I think you just need to check and adjust the amount of air that bypasses the idle controller, and perhaps adjust the duty cycle.
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Russbus
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Re: AC idle dips

Post by Russbus »

How do I adjust the amount of air that bypasses the idle controller? I know stupid question lol just dont wanna mess anything up.
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Spunkster
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Re: AC idle dips

Post by Spunkster »

First you must unplug the idle controller and set the idle manually at the throttle body at about 550 RPM.

Then all adjustments are made to the idle section of the parameters window in the software.
Russbus
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Re: AC idle dips

Post by Russbus »

Hey spunkster when I have the iacv unplugged how do I set the idle manually at the controller with the k20 set up I dont see a idle screw.
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Spunkster
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Re: AC idle dips

Post by Spunkster »

What is the idle when you have the idle controller unplugged?
Russbus
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Re: AC idle dips

Post by Russbus »

Jumps up to about 950 rpm's
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Spunkster
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Re: AC idle dips

Post by Spunkster »

Have you tried making changes to the slider for idle valve duty cycle adjustment?
Russbus
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Re: AC idle dips

Post by Russbus »

Yes I have still nothing
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Spunkster
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Re: AC idle dips

Post by Spunkster »

Do you have a light weight flywheel?
Russbus
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Re: AC idle dips

Post by Russbus »

Yes it's the stock k20a type r flywheel
Russbus
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Re: AC idle dips

Post by Russbus »

So it's a 11lb flywheel
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