When I started burning my own proms the IAC reading was normal (40-50 steps at idle). I noticed the other day that it had climbed to about 80-90 steps ta idle and 135 while driving. The only tables that I have really modified are the main spark tables, could this effect the IAC or do I need to go looking for other problems? Thanks

 

Personally, I tune for min IAC counts at idle. 0 is fine by me.

Yes, changing you timing, at idle, can change your IAC counts at idle.

The IAC has several functions, and one is as of a throttle follower, so you'll always see it rise with increases in throttle opening.

Changing timing at cruise or WOT won't affect the IAC counts.

 

First, thanks for your help grumpy I really appriciate (sp?) it.

Now, is it a bad thing that they are that high? should I change the timing to bring them lower?

One last thing, does raising the timing usually raise or lower the IAC counts?

TIA,

Jim

 

The IAC has several functions, and one is as of a throttle follower, so you'll always see it rise with increases in throttle opening.


Grumpy ,Should your IAC be at maximum count at wot?
And what is max count 145?

 

max counts are adjustable in TC but the stock setting is 160