anyone know how to tune a iac motor.

[monaro308]

There was a pre-measurement between the pintle and the body of the IAC that needed to be set before it went back into the t/body.It was something like 28mm but i have to check in the VN w/shop manual to make sure.

[V8hilux]

Yeah, I wondered about how far to wind it into the motor before installing it. I just had it clicking itself in until the spring was almost binding and went with that.

Then I set the max steps back to 196 so hope it is about right. I think the depth of the hole in the come manifold is a little shorter than the depth of the holden throttle body.

I have taken the iac through all 196 steps and it hasn't seemed to bind, the motor was changing revs with each step in both directions so hope i have it.

I couldn't believe how small those wires were, they didn't even have plastic on them, just that insulating varnish stuff i suppose. you had to have the unit almost back together and had to try to get the soldering iron in to this small gap to get at em, I had the soldering iron in my mouth, and working 2 small watchmakers screwdrivers with my hands and using the soldering iron to heat one of the screwdrivers to melt the solder to get em. lol.

Cheers,

[Holden202T]

now you just need to adjust the butterfly so you go 20-30 steps at warm idle and it should pretty well take care of everything else for you!