MS3 Pro IAC stepper opening above locked out speed

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goldduster318
MS/Extra Newbie
Posts: 10
Joined: Sun Dec 07, 2014 1:58 pm
Location: Lake Orion, MI

MS3 Pro IAC stepper opening above locked out speed

Post by goldduster318 »

Hello,

I've had this issue where the stepper IAC valve opens above the minimum vehicle speed forever with the car. I upgraded the firmware to V1.5.0 so this is now set under "engine state settings".

My car has a VSS in it and the settings are set to keep the IAC closed above 2 mph just as a general setting. The car has a 4-speed so I may push the clutch in before this so once it works correctly, I may need to change the setting. In any case, it tends to open if you're running with the throttle closed for a long period in gear while moving, such as going around a corner or coasting up to a light. I'd like to control this to only when I need it to idle. Please help!

I've attached the MSQ along with a data log.

Thank you!
Image
1970 Duster, 340ci/470hp 4-speed, 3.23:1, Megasquirt 3 Pro Sequential EFI with LSX truck coils
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