IAT sensor

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May 29, 2007 | 07:05 PM

ken0001

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Joined: Apr 2007

Posts: 50

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From: Portsmouth, RI, USA

IAT sensor

Hi guys, can anybody tell me where the Intake Air Temp. sensor is located on my 1988 F-250 4.9L I6.
A picture or diagram if available would be awesome!!

Thanks in advance guys!

May 30, 2007 | 01:08 AM

cjsteak

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Joined: Feb 2005

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Howdy Ken,

This will probably be a learning experience for both you and I but I don't think your truck has an IAT, but an IAC (Idle Air Control valve).

Here's a pic I found of it at the Autozone website.

http://autozone.com/R,APP463611/vehicleId,1071701/initialAction,partProductDetail/store,573/partType,00207/shopping/partProductDetail.htm

I believe your IAC is the only other sensor on your throttle body besides your TPS (throttle position sensor). The IAC should be mounted on the very top of your throttlebody, centered. It only has 2 wires coming out of it and the connector points towards the front of the truck.

As far as I know.. which isn't very far... I think IAT's are found on the newer Mass Air trucks such as the 1996 4.9's. The IAC is the speed density way of measuring the intake charge temperature... I think.

May 30, 2007 | 10:56 AM

Silver Streak

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Joined: May 2002

Posts: 3,241

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From: Broken Arrow, OK

It does have an IAT. It is screwed into the #1 cylinder intake manifold runner. There are also some that have them in the airbox, but I think yours should be in the intake.

May 30, 2007 | 11:50 AM

ken0001

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Joined: Apr 2007

Posts: 50

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From: Portsmouth, RI, USA

hey brother, how do I get to it?? It seems you need the hands of a 2 years old to get to it????

May 31, 2007 | 01:49 AM

cjsteak

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Joined: Feb 2005

Posts: 158

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Silver Streak, thanks for clearing up my confused mess. I'm going to go look at my truck just so I know where it's at and how hard it is to get off if I ever need to get it off.

What are the symptoms of a failing IAT?

Thanks!