IAT Sensor????
Question:
What wasn’t clear? YOU HAVE NO IAT OR MAF SENSOR ON YOUR TRUCK. Got it? You have a MAP, TPS, CTS and O2 sensor-controlled engine. No mass airflow, no intake air temp, no fancy schmancy Vortec controls. Sam – Hide quoted text — Show quoted text -> clear as mud, thanks > On throttle body injections like the one on your truck, something called > "speed density" is used. The computer is setup to determine fuel deliver > based on MAP (manifold absolute pressure–vacuum), TPS(throttle position > sensor), CTS (coolant temp sensor), and Oxygen Sensosor. With speed > density, I’m assuming, GM figured out how to deliver fuel based on factors > without IAT. It’s all in the engineering. If "there is more than one way > to skin a cat" there is "more than one way to figure out how to inject > fuel > into an engine and make it run". > On some vehicles I’ve seen where IAT is subtle input for fuel delivery, > and > on other vehicles I’ve seen where it is a critical input for determining > fuel delivery. For example, in some foreign cars with early TBI > injection, > the Oxygen sensor was a subtle input, where as long as I can remember > oxygen > sensors in GM’s have always been a crucial input for fuel delivery…. > So long story short, to answer your question, NO would be the answer to > anything "similar to IAT". > Is this more clear now???? > Nick > > OK, THAT made no sense at all to me. > > Anything similar to the IAT? > > > in this instance, the 4×4 is not the "K" he was looking for, it is the > VIN > > > code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ > Vortec’s > > > have them, TBI motors do not. > > > I’d say since the TBI is a MAP based system, air temp isn’t as > important > > as > > > in a MAF based system. > > > -Bret > > > > I am checking out all of the sensors and or relays that feed the > brain > > of > > > > this thing. After 120,000 miles, I want to make sure everything is > > reading > > > > what it should and that the computer isn’t compensating or "just > inside > > > > range" on some of the values. Just a bug I got on and wanted to > follow > > > > through. Yes, it does have the TBI and yes, it is a 4×4, so that > means > > it > > > > has the K designation. Are you sure there is not an IAT? What would > > > replace > > > > it or what other readings does the brain pull from? > > > > > Your 350 should be a throttle body (TBI) injected 350 right > (eighth > > > digit > > > > of > > > > > your VIN is a K)?? If it is, from what I know there isn’t an IAT > > > sensor. > > > > > Those or more "typical" on Multi-Port injection. Can I ask why > you > > are > > > > > trying to find it??? Did you pull flash codes by grounding the > DLC?? > > > > > (jumper A-B) I’ve read flash codes and then went to a generic GM > Code > > > > Chart > > > > > and have been mislead before.. Hope this helps… > > > > > Nick > > > > > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to > > locate > > > > the > > > > > > IAT sensor, where the heck is it supposed to be? The manual > just > > > > > describes > > > > > > it, but dosen’t give you an exact location… > > > > > > Any one help? > > > > > > — > > > > > > Whenever I feel blue, I start breathing again.
Response:
clear as mud, thanks
– Hide quoted text — Show quoted text -> On throttle body injections like the one on your truck, something called > "speed density" is used. The computer is setup to determine fuel deliver > based on MAP (manifold absolute pressure–vacuum), TPS(throttle position > sensor), CTS (coolant temp sensor), and Oxygen Sensosor. With speed > density, I’m assuming, GM figured out how to deliver fuel based on factors > without IAT. It’s all in the engineering. If "there is more than one way > to skin a cat" there is "more than one way to figure out how to inject fuel > into an engine and make it run". > On some vehicles I’ve seen where IAT is subtle input for fuel delivery, and > on other vehicles I’ve seen where it is a critical input for determining > fuel delivery. For example, in some foreign cars with early TBI injection, > the Oxygen sensor was a subtle input, where as long as I can remember oxygen > sensors in GM’s have always been a crucial input for fuel delivery…. > So long story short, to answer your question, NO would be the answer to > anything "similar to IAT". > Is this more clear now???? > Nick > OK, THAT made no sense at all to me. > Anything similar to the IAT? > > in this instance, the 4×4 is not the "K" he was looking for, it is the > VIN > > code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ > Vortec’s > > have them, TBI motors do not. > > I’d say since the TBI is a MAP based system, air temp isn’t as important > as > > in a MAF based system. > > -Bret > > > I am checking out all of the sensors and or relays that feed the brain > of > > > this thing. After 120,000 miles, I want to make sure everything is > reading > > > what it should and that the computer isn’t compensating or "just > inside > > > range" on some of the values. Just a bug I got on and wanted to follow > > > through. Yes, it does have the TBI and yes, it is a 4×4, so that means > it > > > has the K designation. Are you sure there is not an IAT? What would > > replace > > > it or what other readings does the brain pull from? > > > > Your 350 should be a throttle body (TBI) injected 350 right (eighth > > digit > > > of > > > > your VIN is a K)?? If it is, from what I know there isn’t an IAT > > sensor. > > > > Those or more "typical" on Multi-Port injection. Can I ask why you > are > > > > trying to find it??? Did you pull flash codes by grounding the > DLC?? > > > > (jumper A-B) I’ve read flash codes and then went to a generic GM > Code > > > Chart > > > > and have been mislead before.. Hope this helps… > > > > Nick > > > > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to > locate > > > the > > > > > IAT sensor, where the heck is it supposed to be? The manual just > > > > describes > > > > > it, but dosen’t give you an exact location… > > > > > Any one help? > > > > > — > > > > > Whenever I feel blue, I start breathing again.
Response:
On throttle body injections like the one on your truck, something called "speed density" is used. The computer is setup to determine fuel deliver based on MAP (manifold absolute pressure–vacuum), TPS(throttle position sensor), CTS (coolant temp sensor), and Oxygen Sensosor. With speed density, I’m assuming, GM figured out how to deliver fuel based on factors without IAT. It’s all in the engineering. If "there is more than one way to skin a cat" there is "more than one way to figure out how to inject fuel into an engine and make it run". On some vehicles I’ve seen where IAT is subtle input for fuel delivery, and on other vehicles I’ve seen where it is a critical input for determining fuel delivery. For example, in some foreign cars with early TBI injection, the Oxygen sensor was a subtle input, where as long as I can remember oxygen sensors in GM’s have always been a crucial input for fuel delivery…. So long story short, to answer your question, NO would be the answer to anything "similar to IAT". Is this more clear now???? Nick – Hide quoted text — Show quoted text -> OK, THAT made no sense at all to me. > Anything similar to the IAT? > in this instance, the 4×4 is not the "K" he was looking for, it is the VIN > code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ Vortec’s > have them, TBI motors do not. > I’d say since the TBI is a MAP based system, air temp isn’t as important > as > in a MAF based system. > -Bret > > I am checking out all of the sensors and or relays that feed the brain > of > > this thing. After 120,000 miles, I want to make sure everything is > reading > > what it should and that the computer isn’t compensating or "just inside > > range" on some of the values. Just a bug I got on and wanted to follow > > through. Yes, it does have the TBI and yes, it is a 4×4, so that means > it > > has the K designation. Are you sure there is not an IAT? What would > replace > > it or what other readings does the brain pull from? > > > Your 350 should be a throttle body (TBI) injected 350 right (eighth > digit > > of > > > your VIN is a K)?? If it is, from what I know there isn’t an IAT > sensor. > > > Those or more "typical" on Multi-Port injection. Can I ask why you > are > > > trying to find it??? Did you pull flash codes by grounding the DLC?? > > > (jumper A-B) I’ve read flash codes and then went to a generic GM Code > > Chart > > > and have been mislead before.. Hope this helps… > > > Nick > > > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to > locate > > the > > > > IAT sensor, where the heck is it supposed to be? The manual just > > > describes > > > > it, but dosen’t give you an exact location… > > > > Any one help? > > > > — > > > > Whenever I feel blue, I start breathing again.
Response:
No, like bret said, the TBI is a ‘Speed Density’ system. Fuel map is calculated from Manifold vacume, and RPM’s. Intake air temp and density is not measured like in the later Vortex’s. Cheers – Hide quoted text — Show quoted text -> OK, THAT made no sense at all to me. > Anything similar to the IAT? > in this instance, the 4×4 is not the "K" he was looking for, it is the VIN > code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ Vortec’s > have them, TBI motors do not. > I’d say since the TBI is a MAP based system, air temp isn’t as important > as > in a MAF based system. > -Bret > > I am checking out all of the sensors and or relays that feed the brain > of > > this thing. After 120,000 miles, I want to make sure everything is > reading > > what it should and that the computer isn’t compensating or "just inside > > range" on some of the values. Just a bug I got on and wanted to follow > > through. Yes, it does have the TBI and yes, it is a 4×4, so that means > it > > has the K designation. Are you sure there is not an IAT? What would > replace > > it or what other readings does the brain pull from? > > > Your 350 should be a throttle body (TBI) injected 350 right (eighth > digit > > of > > > your VIN is a K)?? If it is, from what I know there isn’t an IAT > sensor. > > > Those or more "typical" on Multi-Port injection. Can I ask why you > are > > > trying to find it??? Did you pull flash codes by grounding the DLC?? > > > (jumper A-B) I’ve read flash codes and then went to a generic GM Code > > Chart > > > and have been mislead before.. Hope this helps… > > > Nick > > > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to > locate > > the > > > > IAT sensor, where the heck is it supposed to be? The manual just > > > describes > > > > it, but dosen’t give you an exact location… > > > > Any one help? > > > > — > > > > Whenever I feel blue, I start breathing again.
Response:
OK, THAT made no sense at all to me. Anything similar to the IAT?
– Hide quoted text — Show quoted text -> in this instance, the 4×4 is not the "K" he was looking for, it is the VIN > code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ Vortec’s > have them, TBI motors do not. > I’d say since the TBI is a MAP based system, air temp isn’t as important as > in a MAF based system. > -Bret > I am checking out all of the sensors and or relays that feed the brain of > this thing. After 120,000 miles, I want to make sure everything is reading > what it should and that the computer isn’t compensating or "just inside > range" on some of the values. Just a bug I got on and wanted to follow > through. Yes, it does have the TBI and yes, it is a 4×4, so that means it > has the K designation. Are you sure there is not an IAT? What would > replace > it or what other readings does the brain pull from? > > Your 350 should be a throttle body (TBI) injected 350 right (eighth > digit > of > > your VIN is a K)?? If it is, from what I know there isn’t an IAT > sensor. > > Those or more "typical" on Multi-Port injection. Can I ask why you are > > trying to find it??? Did you pull flash codes by grounding the DLC?? > > (jumper A-B) I’ve read flash codes and then went to a generic GM Code > Chart > > and have been mislead before.. Hope this helps… > > Nick > > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to locate > the > > > IAT sensor, where the heck is it supposed to be? The manual just > > describes > > > it, but dosen’t give you an exact location… > > > Any one help? > > > — > > > Whenever I feel blue, I start breathing again.
Response:
in this instance, the 4×4 is not the "K" he was looking for, it is the VIN code for the 5.7 TBI engine. IAT is Intake Air Temp, right? 96+ Vortec’s have them, TBI motors do not. I’d say since the TBI is a MAP based system, air temp isn’t as important as in a MAF based system. -Bret – Hide quoted text — Show quoted text -> I am checking out all of the sensors and or relays that feed the brain of > this thing. After 120,000 miles, I want to make sure everything is reading > what it should and that the computer isn’t compensating or "just inside > range" on some of the values. Just a bug I got on and wanted to follow > through. Yes, it does have the TBI and yes, it is a 4×4, so that means it > has the K designation. Are you sure there is not an IAT? What would replace > it or what other readings does the brain pull from? > Your 350 should be a throttle body (TBI) injected 350 right (eighth digit > of > your VIN is a K)?? If it is, from what I know there isn’t an IAT sensor. > Those or more "typical" on Multi-Port injection. Can I ask why you are > trying to find it??? Did you pull flash codes by grounding the DLC?? > (jumper A-B) I’ve read flash codes and then went to a generic GM Code > Chart > and have been mislead before.. Hope this helps… > Nick > > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to locate > the > > IAT sensor, where the heck is it supposed to be? The manual just > describes > > it, but dosen’t give you an exact location… > > Any one help? > > — > > Whenever I feel blue, I start breathing again.
Response:
I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to locate the IAT sensor, where the heck is it supposed to be? The manual just describes it, but dosen’t give you an exact location… Any one help? — Whenever I feel blue, I start breathing again.
Response:
Your 350 should be a throttle body (TBI) injected 350 right (eighth digit of your VIN is a K)?? If it is, from what I know there isn’t an IAT sensor. Those or more "typical" on Multi-Port injection. Can I ask why you are trying to find it??? Did you pull flash codes by grounding the DLC?? (jumper A-B) I’ve read flash codes and then went to a generic GM Code Chart and have been mislead before.. Hope this helps… Nick – Hide quoted text — Show quoted text -> I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to locate the > IAT sensor, where the heck is it supposed to be? The manual just describes > it, but dosen’t give you an exact location… > Any one help? > — > Whenever I feel blue, I start breathing again.
Response:
I am checking out all of the sensors and or relays that feed the brain of this thing. After 120,000 miles, I want to make sure everything is reading what it should and that the computer isn’t compensating or "just inside range" on some of the values. Just a bug I got on and wanted to follow through. Yes, it does have the TBI and yes, it is a 4×4, so that means it has the K designation. Are you sure there is not an IAT? What would replace it or what other readings does the brain pull from?
– Hide quoted text — Show quoted text -> Your 350 should be a throttle body (TBI) injected 350 right (eighth digit of > your VIN is a K)?? If it is, from what I know there isn’t an IAT sensor. > Those or more "typical" on Multi-Port injection. Can I ask why you are > trying to find it??? Did you pull flash codes by grounding the DLC?? > (jumper A-B) I’ve read flash codes and then went to a generic GM Code Chart > and have been mislead before.. Hope this helps… > Nick > I have a 95 GMC Sierra 4×4 with the 350 motor. I can’t seem to locate the > IAT sensor, where the heck is it supposed to be? The manual just > describes > it, but dosen’t give you an exact location… > Any one help? > — > Whenever I feel blue, I start breathing again.
