How exactly do you hook up the gauge to the o2 sensor??? Does anybody know which wire it is that you hook it up to? Because my gauge hops up and down and doesnt show it running rich at all even though its supposed to when its cold, right... But does anybody know exactly what wire it is and how would i know if i got the right one? thanks....
Air/Fuel Ratio Gauge Question?
- Thread starter Pro5090GT
- Start date
Pin 43 (Dark Blue/Lt Geen wire) or pin 29 (Dark Green/Pink wire ) on the computer
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)
http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif
The A/F gauges that use the O2 sensor signal will jump all over the place. The reason is that the O2 sensors "switch" between .2 volt lean and .6 volt rich with a curve that looks like the drop off a high cliff. The curve is almost straight up and down, so the voltage shoots from .2 to .6 and back down again 2 or more times a second at cruse.
See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)
http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif
The A/F gauges that use the O2 sensor signal will jump all over the place. The reason is that the O2 sensors "switch" between .2 volt lean and .6 volt rich with a curve that looks like the drop off a high cliff. The curve is almost straight up and down, so the voltage shoots from .2 to .6 and back down again 2 or more times a second at cruse.
whitemustang89
Member
flyinghi3
Member
i did what whitemustang89 did and hook mine up to the wire on the 02 sensorIf you installed it correctly and....
" my gauge hops up and down and doesnt show it running rich at all even though its supposed to when its cold, right..."....PRO5090GT
What is supposed to happen is that upon initial cold-start conditions, it will immediately drop off the scale in the lean, then within a few seconds it will drift into the rich, kind of bounce a little, then once the O2 sensors warm up and the engine switches into closed-loop operation it should bounce in the mid-range...sometimes a little lean, sometimes a little rich. When you hit the gas, it will go rich. When you let off the gas quickly, it will go lean.
This is all assuming that all sensors, solenoids, computer and what-not are working properly, proper tune, adequate fuel delivery, and so on. Too many times people are posting that those A/F ratio meters are a POS, not understanding that all it is is a voltage meter with a pretty light display. So if it isn't reading the O2 sensor voltage you think it should, then perhaps there is something wrong with the sensors or your tuning.
" my gauge hops up and down and doesnt show it running rich at all even though its supposed to when its cold, right..."....PRO5090GT
What is supposed to happen is that upon initial cold-start conditions, it will immediately drop off the scale in the lean, then within a few seconds it will drift into the rich, kind of bounce a little, then once the O2 sensors warm up and the engine switches into closed-loop operation it should bounce in the mid-range...sometimes a little lean, sometimes a little rich. When you hit the gas, it will go rich. When you let off the gas quickly, it will go lean.
This is all assuming that all sensors, solenoids, computer and what-not are working properly, proper tune, adequate fuel delivery, and so on. Too many times people are posting that those A/F ratio meters are a POS, not understanding that all it is is a voltage meter with a pretty light display. So if it isn't reading the O2 sensor voltage you think it should, then perhaps there is something wrong with the sensors or your tuning.
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