IAT or mass airflow sensor?

[SRadke]

What is the sensor on the intake tube of the third gens, IAT or mass airflow? I thought it was IAT but after removing it and takeing a look it isn't shaped like I expected a temp sensor, more like an airflow sensor. I'm making some intake changes and need to know if it's necessary to remount it or if I can just let it hang on the wire. Thanks.



-Scott

 

[TCDiesel]

What is the sensor on the intake tube of the third gens, IAT or mass airflow? I thought it was IAT but after removing it and takeing a look it isn't shaped like I expected a temp sensor, more like an airflow sensor. I'm making some intake changes and need to know if it's necessary to remount it or if I can just let it hang on the wire. Thanks.



-Scott

Placement is critical ,It is used By the ECM for engine and fan operations,it is the MAF sensor.

 

[Matt400]

It is a dual function sensor- for Intake Air Temperature and Pressure. Not to be confused with the dual function IAT/MAP sensor in the manifold that also is for temperature and pressure.

 

[nickleinonen]

it is an intake air temp sensor and barometric sensor... it sorta measures intake air restriction and adjusts fueling based on the temp and baro readings.



by the design of the sensor, technically you could make more power with it left out of the piping as it would read a little higher atmospheric pressure [no low pressure created by intake air filter restriction] allowing the ecm to fuel more as long as the temp it is reading doesn't get high... .



i've run my truck with it in the piping for my bhaf [where it currently is] and with it not in the piping... no noticeable difference in how it feels, reacts, fuel economy... on a chassis dyno, i don't think you would see any power difference, on an engine dyno, you probably would see small differences

 

[SRadke]

Thanks guys. For now it's dangling and when I get time later I'll try to remount it.



-Scott