Air fuel gauge

west_side_supra · 06-08-2007, 11:13 PM

i just picked up a air fuel ratio gauge and i was trying to figure out what color wire i need to use for oxigen sensor, the ECU one im guessing.

either i did find the right one and its telling the truth and the car is running beyond rich or its just a wrong wire

Supra2NR · 06-08-2007, 11:27 PM

Quote:

Originally Posted by west_side_supra

i just picked up a air fuel ratio gauge and i was trying to figure out what color wire i need to use for oxigen sensor, the ECU one im guessing.

either i did find the right one and its telling the truth and the car is running beyond rich or its just a wrong wire

those ones are not really that reliable or accurate for that matter

i wouldnt trust that gauge 4 sh!t

west_side_supra · 06-09-2007, 12:17 AM

i already know that its not that accurate, but the fact is the car is running rich. i already knew this, but i just got it so that when i buy or fix things its good to know if im acually doing anything to get it closer to running right.

cre · 06-09-2007, 04:16 AM

It's not just a matter of how much info they display, but the consistency of it. Try connecting a volt meter to the O2 line and you'll see the signal bounces all over the place. Unless the gauge is heavily buffered (in which case it's worthless for a different reason) it's still not going to really provide you with any decent information... not even a good basis for a hunch.

As for which wire, what year and model are your car?

west_side_supra · 06-09-2007, 05:51 AM

87 turbo, its got the heated wires for the 02.

cre · 06-09-2007, 06:39 AM

'87-'88 Turbo ECU pinout is here: http://www.fadingworld.com/Supra/MAF...0-%2087-88.jpg

Don't refer to the diagram for anything else though, it's incomplete.

06-08-2007, 11:13 PM	#1
west_side_supra 12psi boost Join Date: Sep 2006 Location: Marysville Washington Posts: 353	Air fuel gauge i just picked up a air fuel ratio gauge and i was trying to figure out what color wire i need to use for oxigen sensor, the ECU one im guessing. either i did find the right one and its telling the truth and the car is running beyond rich or its just a wrong wire __________________ 7MGTE - 500hp never dyno'd exhaust: 3inch pipes no cat/powerhouse manifold/garret gt47 18psi/HKS SS racing wastegate fidenza cam gears intake: PHR 4inch intake/K&N filter/3 inch intercooler/ pipeFMIC/greddy type R bov/ fuel: 550cc PTE/ walbro 255lp / Aeromotive adj pressure regulator transmission: Fidenza flywheel/ACT extreme kit electronics: map ecu 1 / HKS EVC 9 gauges:boost,EGT,oil temp & pressure/aem AFR

06-09-2007, 12:17 AM	#3
west_side_supra 12psi boost Join Date: Sep 2006 Location: Marysville Washington Posts: 353	i already know that its not that accurate, but the fact is the car is running rich. i already knew this, but i just got it so that when i buy or fix things its good to know if im acually doing anything to get it closer to running right. __________________ 7MGTE - 500hp never dyno'd exhaust: 3inch pipes no cat/powerhouse manifold/garret gt47 18psi/HKS SS racing wastegate fidenza cam gears intake: PHR 4inch intake/K&N filter/3 inch intercooler/ pipeFMIC/greddy type R bov/ fuel: 550cc PTE/ walbro 255lp / Aeromotive adj pressure regulator transmission: Fidenza flywheel/ACT extreme kit electronics: map ecu 1 / HKS EVC 9 gauges:boost,EGT,oil temp & pressure/aem AFR

06-09-2007, 05:51 AM	#5
west_side_supra 12psi boost Join Date: Sep 2006 Location: Marysville Washington Posts: 353	87 turbo, its got the heated wires for the 02. __________________ 7MGTE - 500hp never dyno'd exhaust: 3inch pipes no cat/powerhouse manifold/garret gt47 18psi/HKS SS racing wastegate fidenza cam gears intake: PHR 4inch intake/K&N filter/3 inch intercooler/ pipeFMIC/greddy type R bov/ fuel: 550cc PTE/ walbro 255lp / Aeromotive adj pressure regulator transmission: Fidenza flywheel/ACT extreme kit electronics: map ecu 1 / HKS EVC 9 gauges:boost,EGT,oil temp & pressure/aem AFR

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06-09-2007, 04:16 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It's not just a matter of how much info they display, but the consistency of it. Try connecting a volt meter to the O2 line and you'll see the signal bounces all over the place. Unless the gauge is heavily buffered (in which case it's worthless for a different reason) it's still not going to really provide you with any decent information... not even a good basis for a hunch. As for which wire, what year and model are your car?

06-09-2007, 06:39 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	'87-'88 Turbo ECU pinout is here: http://www.fadingworld.com/Supra/MAF...0-%2087-88.jpg Don't refer to the diagram for anything else though, it's incomplete.