where the hell is it??????

[AGRO]

there must be a iat ve multiplier or something alike in the factory cal, i know the cos # 5 has but why dont we have the factory one available?, i have wondered this for years, well since 99.

Agro.:D

[Tordne]

For $50 (current deal) you can have it in the Custom OS by upgrading to Commercial version ;)

[AGRO]

thanks for that, i already have a commercial version, still no answer though.

[SSpdDmon]

Because the GM engineers didn't see a need for it.

[AGRO]

i can almost garauntee there is some sort of iat vs fuel, not pe either ve,..... ever disconnected your iat sensor and logged it????? richens the fuel curve by alot, we really need to see this table, its in the code somewhere,

GMPX?
Blacky?

[SSpdDmon]

IAT is referenced in the VE fueling calculation. It's part of an equation, not necessarily another table. If you disconnect the IAT, I believe the PCM assumes a single value. This can alter fueling if the assumed value is different than the actual value. See this post...

http://forum.efilive.com/showthread.php?t=3396