2.2L LAP Performance Tech 2.2L LAP Performance Tech (2009+) 155 hp EcoTec with 150 lb-ft of torque

supercharging - 2.5 bar map rewire + iat2 ?

Old 12-06-2013, 01:09 AM
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supercharging - 2.5 bar map rewire + iat2 ?

Hi guys

I've decided to custom wire in the 2.5 bar map from the lsj. All of the information I have found on this says to wire the temp sensor from the 2.5 bar map to replace the temp sensor in the maf.
So I am basically replacing iat signal with an iat2, right? Do the 2.2l lap engines have a stock source for iat2? If so, where is it and why don't I wire the t-map sensor to that?
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Old 12-06-2013, 01:12 AM
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Pretty sure iat1 is maf and iat2 is map.

Not sure why youd wanna delete one..
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Old 12-06-2013, 07:42 AM
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our car's pcms are only pinned out for 1 IAT signal. therefore you switch it from the maf to the map to get "IAT2"


Pull the iat signal wire from the maf and connect it to the iat on the 2.5 bar map
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Old 12-06-2013, 12:47 PM
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Originally Posted by Slowbalt2000 View Post
Pretty sure iat1 is maf and iat2 is map.

Not sure why youd wanna delete one..
Thats what I thought as well which is why I was asking. All instructions I have found to wire in in the 2.5 bar t-map say to do it though
https://www.cobaltss.net/forums/prob...hematic-76724/
https://www.cobaltss.net/forums/2-2l...nstall-222170/
https://www.cobaltss.net/forums/how-...through-80620/


which led me to believe this might be the case :
Originally Posted by noorjariri View Post
our car's pcms are only pinned out for 1 IAT signal. therefore you switch it from the maf to the map to get "IAT2"

I just wanted to make sure so I don't mess up my car
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Old 12-06-2013, 04:30 PM
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Anyone know where I can find the plug/pigtail for the 2.5 bar map?

nevermind: http://api.viglink.com/api/click?for...38636612978312


Last edited by ShotgunJ; 12-06-2013 at 04:42 PM.
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Old 12-06-2013, 05:14 PM
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Originally Posted by noorjariri View Post
our car's pcms are only pinned out for 1 IAT signal. therefore you switch it from the maf to the map to get "IAT2"

Pull the iat signal wire from the maf and connect it to the iat on the 2.5 bar map
I did not know that. Thanks
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Old 12-06-2013, 05:23 PM
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Originally Posted by Slowbalt2000 View Post
I did not know that. Thanks
Welcome, that is only for the 2.2/2.4's (L61/LAP/LE5) though. The LSJ/LNF has both IAT1 and 2
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Old 12-06-2013, 05:23 PM
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Originally Posted by noorjariri View Post

Welcome, that is only for the 2.2/2.4's (L61/LAP/LE5) though. The LSJ/LNF has both IAT1 and 2
Well i have an l61 for now. Thanks again
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Old 12-06-2013, 06:21 PM
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Originally Posted by Slowbalt2000 View Post
Well i have an l61 for now. Thanks again
You just need the 1 wire...and leave the other one alone.

Thats also the same place I bought my connector.
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Old 12-10-2013, 09:47 PM
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subd for references
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Old 12-12-2013, 12:14 PM
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The wire colours aren't always the same on the MAFs, just so you know. I used a diagram I found on here, and cross-referenced it with the actual pinout and colours for my 2008 (which I pulled from Mitchell) and they were different.

But yeah as it has already been said, you just pull 2 of the IAT-related wires from the MAF, and splice them into the new MAP connector to get IAT2, which the computer sees as IAT1. Just make sure you're tuned correctly for it though as it does make a difference.
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Old 12-12-2013, 04:07 PM
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Originally Posted by 2.2balt View Post
The wire colours aren't always the same on the MAFs, just so you know. I used a diagram I found on here, and cross-referenced it with the actual pinout and colours for my 2008 (which I pulled from Mitchell) and they were different.

But yeah as it has already been said, you just pull 2 of the IAT-related wires from the MAF, and splice them into the new MAP connector to get IAT2, which the computer sees as IAT1. Just make sure you're tuned correctly for it though as it does make a difference.
Only 1 wire not 2
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Old 01-12-2014, 12:37 PM
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^Ya you're right. Was several months ago when I did it. Couldn't remember correctly.

Make sure you get tuned if you do this as it won't run right I've heard.
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Old 03-04-2014, 03:38 AM
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I am planning to do this as well. anyone know which wire I would need to move?
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Old 05-08-2014, 03:55 PM
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Originally Posted by 2.2balt View Post
The wire colours aren't always the same on the MAFs, just so you know. I used a diagram I found on here, and cross-referenced it with the actual pinout and colours for my 2008 (which I pulled from Mitchell) and they were different.

But yeah as it has already been said, you just pull 2 of the IAT-related wires from the MAF, and splice them into the new MAP connector to get IAT2, which the computer sees as IAT1. Just make sure you're tuned correctly for it though as it does make a difference.
Yeah my MAF colors arent the same as the 2.2s which color is it for the 2.4? Thanks
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