I have been pretty happy with my Megasquirt so far, had it for about six months now, got it tuned to perfection, and all is well with the world... Except for one small thing I never managed to fix: My Idle Control Valve does not work.
I have been suspicious of this since the beginning, seeing as I have fiddled around with the idle settings a bit but they didn't seem to reflect any change. I settled with the fact that would have to stabilize cold idle with my accelerator pedal, and I was fine with that for a few months.
But since I went back to tuning the ECU for some changes today, I figured since I was at it I might just check the IAC valve function. So I did. I disconnected the valve and proceeded to turn on the car. To my surprise it turned on roughly as it usually does and then stabilized around the 900 RPM.
I then proceeded to place the valve plug back in, and no noticeable change in idle.
So... I'm sure my valve was working because my car used to fast idle on the stock ECU. It never did with the Megasquirt. I'm using the stock 90-93 settings for the idle, so I'm placing the blame in the outputs or a hardware problem. What do you guys think it could be?
My outputs settings are as follows:
I'm not bothered by this problem because the car runs flawlessly now, except when started from cold. But I would appreciate having this fixed anyway.