Fuel injection? Open or Closed loop?

Jim B · 07-15-2012, 05:32 PM

2001: A Space Odyssey was the only movie I ever saw where after the ending most of the audience in the theater was standing in the aisles looking back at the screen or looking at each other wondering if the movie was over......I guess A Clockwork Orange (another Kubrick film) is definitely out of the question for Ed's movie library....

Ed Wright · 07-15-2012, 06:33 PM

Jim, I saw that wierd sucker, well, part of it. Walked out before it was over. Too strange for me.

Capri · 07-16-2012, 03:52 PM

I have noticed on alot of the GM and Mopar units that this sensor is left unscrewed into the intake.

Does it stay cooler in the open air and change reading to the processor?

KRatcliff · 07-16-2012, 04:06 PM

Which sensor?

Ed Wright · 07-16-2012, 05:02 PM

Kyle, he has to be talking about the IAT sensor.

Usually mounted in the air filter box or ducting. Can also be screwed into the intake manifold and set up as a MAT sensor. Lots of race cars running around without one, the diagnostic code shut off, and the correction table zeroed out. In Speed Density mode, most recommend a MAT sensor being used.

KRatcliff · 07-16-2012, 05:20 PM

Gotcha. I wasn't sure if he was referring to the MAP sensor which is in the proper position for Speed Density, but flipped up and the hole plugged for Alpha N.

Capri · 07-17-2012, 01:44 PM

Intake air temp sensor. For me, its a factory unit screwed into the lower intake. Just noticed alot of others let it flap in the breeze near the entrance to the TB. Just wondered if it helps something in the fuel curve control.

View Poll Results: Fuel injection? Do you run in open loop or closed loop
Open Loop	80	65.04%
Closed Loop	43	34.96%
Voters: 123. You may not vote on this poll

07-15-2012, 05:32 PM	#1
Jim B Member Join Date: Dec 2008 Posts: 100 Likes: 0 Liked 1 Time in 1 Post	Re: Fuel injection? Open or Closed loop? 2001: A Space Odyssey was the only movie I ever saw where after the ending most of the audience in the theater was standing in the aisles looking back at the screen or looking at each other wondering if the movie was over......I guess A Clockwork Orange (another Kubrick film) is definitely out of the question for Ed's movie library.... Last edited by Jim B; 07-15-2012 at 05:39 PM.

07-15-2012, 06:33 PM	#2
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel injection? Open or Closed loop? Jim, I saw that wierd sucker, well, part of it. Walked out before it was over. Too strange for me. __________________ Ed Wright 4156 SS/JA

07-16-2012, 03:52 PM	#3
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Fuel injection? Air intake temp sensor I have noticed on alot of the GM and Mopar units that this sensor is left unscrewed into the intake. Does it stay cooler in the open air and change reading to the processor?

07-16-2012, 04:06 PM	#4
KRatcliff Senior Member Join Date: Sep 2011 Posts: 769 Likes: 75 Liked 534 Times in 143 Posts	Re: Fuel injection? Open or Closed loop? Which sensor?

07-16-2012, 05:02 PM	#5
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	Re: Fuel injection? Open or Closed loop? Kyle, he has to be talking about the IAT sensor. Usually mounted in the air filter box or ducting. Can also be screwed into the intake manifold and set up as a MAT sensor. Lots of race cars running around without one, the diagnostic code shut off, and the correction table zeroed out. In Speed Density mode, most recommend a MAT sensor being used. __________________ Ed Wright 4156 SS/JA

07-16-2012, 05:20 PM	#6
KRatcliff Senior Member Join Date: Sep 2011 Posts: 769 Likes: 75 Liked 534 Times in 143 Posts	Re: Fuel injection? Open or Closed loop? Gotcha. I wasn't sure if he was referring to the MAP sensor which is in the proper position for Speed Density, but flipped up and the hole plugged for Alpha N.

07-17-2012, 01:44 PM	#7
Capri Member Join Date: Apr 2004 Posts: 171 Likes: 0 Liked 27 Times in 14 Posts	Re: Fuel injection? Open or Closed loop? Intake air temp sensor. For me, its a factory unit screwed into the lower intake. Just noticed alot of others let it flap in the breeze near the entrance to the TB. Just wondered if it helps something in the fuel curve control.