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XfireZ51 · 07-30-2024

The way to set the IAC is after u have it idling just below ur desired idle, say ALMOST stalling, IOW once u have set ur idle just below where u actually want it, connect everything, restart w diag tool and now see hiw many IAC steps u have for ur desired idle. I shoot for something like 10-15steps. If its above that, then open the TB, below that close TB. The point is u want to achieve as little ECM intervention necessary for the motor to operate. IAC reaction is also something that can be modified slowing it or speeding it up.
I like to set my IAC when fans are running due to the extra load so as to give me an extra margin.

07-30-2024	#22
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Challenges setting minimum idle air. The way to set the IAC is after u have it idling just below ur desired idle, say ALMOST stalling, IOW once u have set ur idle just below where u actually want it, connect everything, restart w diag tool and now see hiw many IAC steps u have for ur desired idle. I shoot for something like 10-15steps. If its above that, then open the TB, below that close TB. The point is u want to achieve as little ECM intervention necessary for the motor to operate. IAC reaction is also something that can be modified slowing it or speeding it up. I like to set my IAC when fans are running due to the extra load so as to give me an extra margin. Last edited by XfireZ51; 07-30-2024 at 04:56 PM.