Re: I6 Starting and Idle problem
Thanks CJ2609. Yeah, I've cleaned it pretty well with carb cleaner. You can hear and feel (at the port to the IACV inside the throttle body) that it's doing it's thing as the load on the engine changes (A/C or P'steer or putting into Drive etc). Idles perfectly under all conditions (except that 1st start).
No mods done to the motor, exhaust, or intake. This is just a straight family runabout and this problem has only surfaced in the last month or so (just after the warranty ran out of course).
The ECU should command the IACV fully open during cranking (to allow foot off throttle starts) which it is. Then when the key is released it should control the idle to suit conditions (ie fast idle when cold). It's as if the ECU is commanding the IACV to close fully when the key is released. On the 2nd attempt it works perfectly.
Don't know if it is the IACV itself or another sensor that's faulty. I think I need to look at what a brand new IACV looks like - mine seems sloppy inside.
I have the AU1,2,3 Max Ellery service manual but it's pretty useless and I still don't know how to get into the KOEO/KOER self test modes (without scan tool) either.