Hi Genpop,
I went out to the car and tried your method of adjusting the IAC, and set the marker to where you had put the arrow (wasn't sure if you had just randomly put the arrow in, or it was in a specific place)
First, the button was greyed out with the engine running, but after some reconnecting, I set the IAC. I got 180 steps where your arrow was, then I guessed lower, and got 41, then finally 29.(I also got a message each time saying Error, command not sent)
, the ecu raised the engine speed, so
Each time I adjusted, The engine raised in speed- I'm not sure what command was not sent (I think I saw 2700 on the gauge .) until it hit its throttle idle switch rev limit, and if I wasn't quick enough, the stepper motor pin would adjust inwards to cut the revs - but only until about 1500rpm
If I was quick enough to adjust the screw, the idle steps would drop straight back to 0 - even with a slight move, and the idle would be 1200-1600 again. When this happens, It doesn't matter if I put the screw in or out - the steps are 0, and the idle either hits the throttle switch rev limit, or goes to around 1300.
Interestingly, It warmed up sounding fairly smooth/sweet - maybe a little rich - but it is warming up, so to be expected - but as it got to a certain point, something triggers in the ecu, and the revs change - they go higher, and leaner. car sounds good, but revs are high.
I think I have got part of a log, but I need to check my laptop tonight . (the laptop battery went flat..)
What do you know about a small blanked off factory set covered screw on the back of the SPi throttle body - I think Sprocket mentioned it somewhere?
The person before me adjusted pretty much everything, but I have not seen this screw, or if the cover has been removed..