no high rev
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
The intake air temperature (IAT) sensor is a thermistor-type sensor with a variable resistance that changes when exposed to different temperatures. When interfaced with the powertrain control module (PCM), it produces a 0-5 volt analog signal that will measure temperature.
The IAT sensor's primary function is to measure ambient air temperature in order to determine when the exhaust back pressure device is needed. It is also used as input to determine idle kicker function.
Detection/Management
An IAT signal that is detected out of range high or low by the PCM will cause the engine to ignore the IAT signal, disable exhaust back pressure operation and assume an ambient temperature of 15°C (59°F).
Glad to have helped Chase.
The IAT sensor's primary function is to measure ambient air temperature in order to determine when the exhaust back pressure device is needed. It is also used as input to determine idle kicker function.
Detection/Management
An IAT signal that is detected out of range high or low by the PCM will cause the engine to ignore the IAT signal, disable exhaust back pressure operation and assume an ambient temperature of 15°C (59°F).
Glad to have helped Chase.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Originally Posted by superduty4x4
Chris- I tried to rep you, but I'm sure you know the story. Your post above was helpful too... how do some of you guys know so dang much about these trucks? 
1) Hang around here and read what others say.
2) Get one of those handy service manucal DVD's.
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Junior User
Joined: Jun 2003
Posts: 62
Likes: 0
From: West Jordan, Utah
sometimes the obvious just is too obvious. after plugging the sensor back in the high rev works again!
thanks everyone for all the help and insite. rep points on the way.
Chase just curious what problem unpluging the sensor will solve for you?
thanks everyone for all the help and insite. rep points on the way.
Chase just curious what problem unpluging the sensor will solve for you?
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
Originally Posted by kjswensen
Chase just curious what problem unpluging the sensor will solve for you?
Originally Posted by F350-6
That parts easy.
1) Hang around here and read what others say.
2) Get one of those handy service manucal DVD's.
1) Hang around here and read what others say.
2) Get one of those handy service manucal DVD's.
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78_ford_F150
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
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Jul 28, 2004 07:42 PM
