Wheres the o2 heater power and o2 heater ground on a 95 EPROM ecu?

[elementalwindx]

For the PLX M-250, exactly like the subject says. I've finally found time to wire in the caps and resistors and since I'm using just my white (wb) wire, I'm assuming I only use one capacitor. Also where the hell do these resistors go? It says o2 heater ground and o2 heater power, but I dont see that anywhere on the vfaq pinouts.

Also on a side note, moving my o2 sensor to the rear bung like almost everybody told me to do did absolutely nothing, but cost me $60 for a replacement o2 cause I ####ed the last one up getting it out with that tial 38mm flange in the way Wish I had put it in the rear in the first place since that was so much easier! *blah*

 

[donmagicjuan]

You're talking about the power resistor(s) to simulate the heating element of the old O2 sensor, right? I just cut the old O2 sensor off, and tapped into the heater wires in the engine bay. The heater wires are both black, and obviously polarity doesn't matter. I mounted my resistors right under my air filter, just to make sure they stayed cool enough. Make sure to mount them on something non-conductive.

I know everyone says not to run a wideband in the front O2 location, but I installed mine there before I heard this dogma(~6 months ago), and I haven't had any problems at all.

Edit: Actually, if you're running the wideband in the rear location, it would probably be a better idea to wire the resistors in the cabin. Hold on I'll look up the ECU pinout info for you.

 

[donmagicjuan]

You must have skipped right over it on the vfaq pinout page, the rear O2 heater is pin 54 and the front is pin 60.

 

[elementalwindx]

You must have skipped right over it on the vfaq pinout page, the rear O2 heater is pin 54 and the front is pin 60.

I know which one is the rear and the front but i do not understand which one is the heater ground and the heater power? or am I not understanding this? Would front be power and rear be ground? WTF

 

[donmagicjuan]

I know which one is the rear and the front but i do not understand which one is the heater ground and the heater power? or am I not understanding this? Would front be power and rear be ground? WTF

Ok, I get what you're asking now. Each of those pins is a power supply. Therefore, you would connect one end of your resistor to the wire at the appropriate location (54 for rear, 60 for front) and the other end of the resistor to a suitable ground. Polarity isn't an issue for resistors. Just be sure to only tap into the location that you're using the wideband in.

 

[elementalwindx]

Ok, I get what you're asking now. Each of those pins is a power supply. Therefore, you would connect one end of your resistor to the wire at the appropriate location (54 for rear, 60 for front) and the other end of the resistor to a suitable ground. Polarity isn't an issue for resistors. Just be sure to only tap into the location that you're using the wideband in.

ahhh that makes more sense Thanks!