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View Full Version : Need help wiring a plx m300 to replace stock sensor


2_fast_240
02-18-2008, 11:03 PM
Alright, ive been searching for hours and the more I read the more confused i get.
I know the red goes to ignition power and black goes to ground. And, the gray goes to the o2 signal.

I get confused when it starts talking about these resistors and capacitors. The diagram shows the resistor going from the o2 heater power to the o2 heater ground. But I see neither of those in any ecu pinouts.
Can I just put it inline with the o2 signal.

The capacitor I have no idea about. Im kinda under the impression that i dont need to worry about that guy.

Also, it says to put the o2 sensor at least 24" from the turbo. My jgs kit has the bung welded right around 17". Has anyone tried this combo or know if I will be o.k. at this distance. The sensor just cant see temps. above 850 C or it will fail.

I might just weld another bung in and put the stock sensor in the jgs dp.

This is a '91 ka24de by the way

S14DB
02-18-2008, 11:23 PM
Weld in a different bung.

smelly240
02-19-2008, 07:31 AM
the resistor is to simulate the Stock O2 sensors heater element... so it doesnt throw a heater malfunction code. You also have to be sure that the analog output is programmed to work as the stock narrowband does. Its easier to weld in a bung. it probably wont hut the sensor being 17 away. I have mine like 6 inches away and it hasnt failed yet.