They make a plug in play for this
U taking 4 wire connector into a a 6 wire ?
Adding the iac to to the connector correct
It's really easy

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Heres a pic

 

Is this what u want

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So is my harness wrong then?

 

I have the 6 pin connector I just don't know why the IAC wires were left not connected. Being this an 03 the connections have to be in the harness somewhere i would think.

 

Well there is a reason ur right. 03 04 have the 6 wire connector. If it's disconnected there must be a tune. Or someone cut it and just thought it was a good idea. But the 03 04 gt maf has it all incorporated into it

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Is it common to do that in the tune? No cel's, my concern is just inaccurate readings going to cpu with it not connected. Car seems to run ok.

 

If u have a good scan tool u should b able to read the iac inputs. To verify its ok. I know I converted my car from 90mm maf to a slot style maf that the 05 and on uses for my turbo setup

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I don't but i'm going to be putting on the dyno in the near future just to check everything.

 

Are you guys meaning IAT? As in Intake Air Temp sensor?
I thought IAC was Idle Air Control?

Somebody may have relocated the IAT sensor to a different location and just left the wires in the MAF connector?

 

Maybe the IAT gets relocated with the Roush blower setup to read the IAT after the blower (where a Terminator computer would read IAT2?

 

My apologies I meant iat not iac that's a typo

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Yes big typo! I meant IAT. I will check and see if thats the case.