What is and how work??????
What is and how work??????
04-09-09, 10:30 AM
#2
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The intake air temperature sensor senses how cold the incoming air intake charge is. Thats why turbo guys use intercoolers.
cooler air is more dense, thus requiring more fuel.
Your ECU uses this signal as part of its calculations on how to run the engine.
cooler air is more dense, thus requiring more fuel.
Your ECU uses this signal as part of its calculations on how to run the engine.
04-09-09, 10:52 AM
#6
ugh....... it is one of many sensors that when working properly in conjunction with each other assists the ECU in determining the proper amount of fuel air, and the necessary timing advance / retardation. Specifically this sensor happens to be used to determine the temperature of the air as it passes into the intake manifold.
Come on man, do some research, I don't want to see a "what do exhaust do?" thread...... cuz truthfully.....
Come on man, do some research, I don't want to see a "what do exhaust do?" thread...... cuz truthfully.....
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04-09-09, 11:48 AM
#10
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04-09-09, 12:07 PM
#11
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Because our airflow sensors only tell the ecu the velocity of the incoming air, it needs to know the temperature of the incoming air to determine its mass.
04-09-09, 12:08 PM
#12
MECP Certified Installer
The ECU uses the intake air thermistor to derive the mass of air being drawn into the intake, by using the Air Flow Meter. It compares the volume of air ingested with the temperature of the air to come up with air mass. It needs to do this because the volume of air doesn't change with temperature, density does, but you need to know the volume of the incoming air to determine mass from its temperature.
The equation is easy....
M=D*V
I can do a much more detailed explanation, if you or others would like me to. There is alot more to it.
The equation is easy....
M=D*V
I can do a much more detailed explanation, if you or others would like me to. There is alot more to it.
12-13-09, 10:13 AM
#16
12-13-09, 11:30 AM
#17
The IAT sensor in the manifold is actually used for the BAC valve operation, at least on the S4's:
The AFM has an integrated IAT sensor that is used for load calculations:
probably because the manifold IAT sensor is not that important. but also you can't plug it in "backwards" because the sensor is not polarized. It's just a thermistor.
The AFM has an integrated IAT sensor that is used for load calculations:
probably because the manifold IAT sensor is not that important. but also you can't plug it in "backwards" because the sensor is not polarized. It's just a thermistor.
12-29-09, 06:56 PM
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OK so I got my 86 GXL running tonight, but found a saw blade zip tied to hold the AIR FLOW METER open a little bit. When I removed this bit of jankity redneck fix, I found the car wouldn't start. So, do I put the saw blade back? Or is there a better way to resolve my problem.
These are the engine related mods... (Bought it like this)
1986 GXL
Header
3 inch exhaust
Cone air filter, sort of SRI style.
These are the engine related mods... (Bought it like this)
1986 GXL
Header
3 inch exhaust
Cone air filter, sort of SRI style.
01-20-10, 10:02 PM
#19
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Should the IAT sensor be replaced during a vacuum hose job? I'd rather not replace it if it doesn't need it but just wondering because im gonna be doing a vacuum hose job very soon. Oops, I didn't see that this is the second gen section. Well the 3rd gens have the IAT sensor underneath the rats nest of vacuum hoses where it is exposed to a great deal of heat, and I was wondering if it should be replaced during a vacuum hose job
01-20-10, 10:16 PM
#20
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It should be fine to leave it be if you are replacing hoses.
The FD guys like to go to a faster reacting IAT as the stock IAT will heat soak(from engine heat) and give the Ecu some bad info.The FC IAT is located before the Throttle body so it is essentially not Around any Heat from the engine.
The FD guys like to go to a faster reacting IAT as the stock IAT will heat soak(from engine heat) and give the Ecu some bad info.The FC IAT is located before the Throttle body so it is essentially not Around any Heat from the engine.
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maikelc
3rd Generation Specific (1993-2002)
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