arite well ive been searching my *** off all night trying to find an answer to this question that seems pretty damn simple, i duno why no one has this info

all i need to know if how much current is going through the o2 sensor wires that go to the ecu (wire d7 and d14)

im abuot to attempt to make a little a/f ratio control panel using resistors and i cant calculate a range of resistance to try without knowing how many amps im dealing with...

also if anyone has any suggestions on how to wire it i would appreciate it. im looking around for some kind of adjustable resistor so i dont need to use too many switches but havent had any luck... i dont even know if they exist.

oh by the way i have a 2000 prelude and the po2s is factory and the so2s is DENSO #234-4092. i dont even kno if this is the right place to ask this question but any help is appreciated ifanyone feels like thinking so thx

 

God I hate the word "guru" and all that it implies.

I've come across this topic on the forums at AEM. You should be able to find all you need to know there with some extensive searching.

 

im tired of searching and i hate that word and all that it implies

 

dvom in line with return wire

 

yea i plan on converting back to obdI with a new ecu and tuning it.. im just doing this for fun and to see if it actually works

i measured the current today and it seems to be at around 55-60 milliamps... so were looking at a .1v increase with 1.33 ohms of resistance. pretty small but not impossible.

what i cant figure out tho is if more resistance will increase the voltage or decrease the current so if anyone has some knowledge on this i could use the help

 

decrease current

 

why is that? normally thats not the case but the sensor circuit is pretty

 

... strange. i cant figure out how to draw it correctly so i cant really figure it out... does the sensor just alter voltages given by the ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nuezdaman44 &raquo;</TD></TR><TR><TD CLASS="quote">... does the sensor just alter voltages given by the ecu? </TD></TR></TABLE>I believe the sensor is the voltage source, and the ECU measures the voltage. You probably want a very high-impedance voltage measurement, in parallel with the ECU.

 

to read the amps on the signal wire you would almost need an oscilloscope the varying voltage changes to fast to read with a dvom, even if you had a dvom good to 10 megaohms res. the sensor caompares ambient air to exhaust gas oxygen and the relays the signal