Cleaning the IAT sensor
#1
Cleaning the IAT sensor
The IAT sensor measures the temperature of the intake manifold. The ECM uses this sensor reading to set injection timing and adjust the air-fuel ratio. If the fuel mileage and power output of you engine seem low, some owners have found improvement in EGT, fuel economy, and power after cleaning carbon from the IAT sensor in at the rear of the intake manifold. Engine with exhaust brakes are particularly prone to IAT sensor fouling because soot is blown back into the intake during valve overlap. Smokingdiesel.com has an information page about problems caused by the IAT sensor.
The only tool you need is a 3/8" ratchet with a 6" extension and 13/16" socket.
The IAT sensor is found on the driver's side of the engine, almost at the back of the intake manifold.
Temperature
Resistance
30°
40K
32°
30k to 36k ohms
76°
13K ohms
77°
9k to 11k ohms
81°
6.87K ohms
122°
3k to 4k ohms
130°
4K ohms
167°
600 to 675 ohms
212°
600 to 675 ohms
Replacement Sensor:
Cummins PN 3408345
Dodge PN 05014197AA Sensor, Temperature (SEN, TEM)
The only tool you need is a 3/8" ratchet with a 6" extension and 13/16" socket.
The IAT sensor is found on the driver's side of the engine, almost at the back of the intake manifold.
Temperature
Resistance
30°
40K
32°
30k to 36k ohms
76°
13K ohms
77°
9k to 11k ohms
81°
6.87K ohms
122°
3k to 4k ohms
130°
4K ohms
167°
600 to 675 ohms
212°
600 to 675 ohms
Replacement Sensor:
Cummins PN 3408345
Dodge PN 05014197AA Sensor, Temperature (SEN, TEM)
Last edited by Whit; 08-31-2007 at 11:20 AM.
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Jet A Fuel (10-27-2015)
#2
Forgot what to clean it with. Only use carb or electronic aerosol cleaners on these sensors. Anything else will leave reisdue that will distorte the readings.
#4
Dont use carb cleaner
Electric contact cleaner is available at most parts stores and is the best thing to use.
#6
for a stock truck...you don't need to do this till well past 100k most of the time...did the old 2001 at 85k and it was clean as a whistle. Do third gens have em?
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wildbill (06-12-2008)
#8
Yes a 3rd gen has an IAT
and if you run a exhaust brake you should clean the IAT every 10k.............its amazing the difference
I cleaned my buddies at around 50k, he has no brake and yes it was carboned up somewhat......you could hear the diff in the idle before and after the cleaning
and if you run a exhaust brake you should clean the IAT every 10k.............its amazing the difference
I cleaned my buddies at around 50k, he has no brake and yes it was carboned up somewhat......you could hear the diff in the idle before and after the cleaning