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Discussion Starter · #1 ·
Hello ,

Where might the "Intake Air Temperature sensor" (IAT) be located exactly, on the 1989 Trooper 2.8 Engines?
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They do have a temperature sensor in the factory air cleaner housing. To test, remove air cleaner cover and put a thermometer as close to the sensor as possible. Temp must be below 86 degrees. Reinstall air cleaner and start the engine. If engine is cool, damper door should close off outside air entering snorkel, instead taking it's air off the exhaust manifold tube. When the damper door starts to open, remove the air cleaner cover and check temp., it should read about 131 degrees.
 

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Discussion Starter · #3 ·
Where is it located on air cleaner? Is it a flat black plastic looking tube? Thanks for the info.
 

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It does not have an IAT sensor that tells the ECM the air temp. It does have a stove pipe that is designed to warm the air on cold mornings to prevent icing. It is completely useless and can be eliminated at any time you choose. It is simply a temperature sensitive vacuum valve that when cold will direct air to the vacuum actuator on the air cleaner lifting up the flapper valve inside and sucking in hot air from off the exhaust manifold.
 

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Discussion Starter · #5 ·
betterthanyou said:
It does not have an IAT sensor that tells the ECM the air temp. It does have a stove pipe that is designed to warm the air on cold mornings to prevent icing. It is completely useless and can be eliminated at any time you choose. It is simply a temperature sensitive vacuum valve that when cold will direct air to the vacuum actuator on the air cleaner lifting up the flapper valve inside and sucking in hot air from off the exhaust manifold.
Thanks my man! In central Florida we dont have to worry about icing much here. Most of the year we deal with hot air so it probly is useless .

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