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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

IAT Sensor

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Old Nov 25, 2009 | 02:06 PM
  #1  
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Bovaloe
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Mountain Pass
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From: East Wenatchee, WA
IAT Sensor

So just did a MAF conversion. Took a wiring harness from a 95 and put it in my 91. Everything worked out but the one question I have left is about the IAT sensor( located in the air box before the MAF stock).
I cant find where to put the wire that goes into the ECM. The pinouts and wiring diagrams I have either say ACT( located on lower intake) or just dont have the sensor on them.
I dont remember if the donor truck had both or not but all the info I can find uses the 2 sensor names interchangeably, so do I need both or is one or the other good enough?
Which one should I use if it is?
I used the pinouts on here:
Ford Fuel Injection

I used my Haynes manual and any wiring diagrams i could find on the internet and cant figure it out.
 
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Old Nov 25, 2009 | 03:11 PM
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Conanski
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ACT stands for Air Charge Temperature and IAT is Intake Air Temperature which is the same thing and you only need 1 of them.
 
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Old Nov 26, 2009 | 09:31 PM
  #3  
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Bovaloe
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Originally Posted by Conanski
ACT stands for Air Charge Temperature and IAT is Intake Air Temperature which is the same thing and you only need 1 of them.
Ok got that. is one better than the other or whats the deal?
I have the ACT hooked up now but the IAT sensor and wire is just hanging out in there and could be plugged in no prob.
So which one should I use?
 
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Old Nov 26, 2009 | 10:33 PM
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Conanski
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It's just a different name for the same thing so get a sensor and plug it in. On earlier motors the air temp sensor was located on the lower intake but it was moved out to the airbox later on.
 
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