need suggestions for tune problem

**bigtoyz** · 03-21-2014, 12:06 AM

Here is my table for the Throttle follower IAC vs. MPH

0 2
4 4
8 8
12 10
16 10
20 10
24 10
28 10
32 10
36 10
40 10
44 10
48 10
52 10
56 10
60 10
64 10

Edit: my counts are at 40 and idles pretty good and returns to idle pretty quick also

**brettmc** · 03-21-2014, 08:23 AM

does this table add the iac counts at that mph or subtract or is this the actual count value at that mph?

**blkchevyz** · 03-21-2014, 08:38 AM

do you have the stock tune or the one you had before modifiing it?

i'm running an obd1 but my throttle follower iac offset is
3
4
8
12
16
20
20
20
20
20
20
20
20
20
20
20
20

this was on a large head/cam car and idled great.

**brettmc** · 03-21-2014, 08:52 AM

do the offset tables add or subtract?

thanks for the table hints. i'm going to try some of these after work today.

**blkchevyz** · 03-21-2014, 09:03 AM

i would think it would open the iac valve more with the higher number, since most cars idle high till you come to a complete stop then drop down.
but that way you would think you wouldnt get the idle to go down... but who know could be pushing it past the limit or just cant keep up, or i could be completely wrong on what it does.

but like you already figured out, make little changes at a time, and make sure you keep the old files in case something just doesnt go right with it. also good to track what you changed as well.