I just got an a/f gauge for my crx. its a 1991. I would also like to use it in my 1996 honda civic 2dr. Could someone here please tell me what the wire is at the PCM for both or either cars so I may test it out and decide which car to use it more on. I planned to use it mainly on the crx, but since its still in project, I might use it on the other vehicle. I know its the O2 sensor wire, unsure of color and pin and whatever else. thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spluvs2install &raquo;</TD></TR><TR><TD CLASS="quote">I just got an a/f gauge for my crx. its a 1991. I would also like to use it in my 1996 honda civic 2dr. Could someone here please tell me what the wire is at the PCM for both or either cars so I may test it out and decide which car to use it more on. I planned to use it mainly on the crx, but since its still in project, I might use it on the other vehicle. I know its the O2 sensor wire, unsure of color and pin and whatever else. thanks</TD></TR></TABLE>

I used my helms manual. it had all the pinouts for the ecu.

 

I dont have any manuals. Could you look it up for me real quick? Unless anyone else knows. thank you!!

 

its a white wire...like the last one...you know how you have plug "A" "B" "C" .... its on "C" ...last wire on the bottom...
C - 16

 

hey man, I'll check it out in the morning since its cold and night time right now, I'll look for that wire and hook up my gauge to it and hopefully that it. Now is that the same for both a crx and for civic or will the civic be different as far as that is concerned?

 

do you have a wide band o2 sensor? because if you dont, the guage is worthless. narrow band o2 sensors dont have enough resolution to display accurate o2 levels beside rich or lean. something to think about before installation.

 

well, im not going to fully install it unless i see that wire either so no worries. otherwise, I have no idea. I need to go get a book about the car somehow

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sanimalp &raquo;</TD></TR><TR><TD CLASS="quote">do you have a wide band o2 sensor? because if you dont, the guage is worthless. narrow band o2 sensors dont have enough resolution to display accurate o2 levels beside rich or lean. something to think about before installation. </TD></TR></TABLE>

For some people, like me, that's all you need. I'm getting it tuned to get the A/F straight. Then, if i'm spraying and it goes to lean for more than a second, I can back off.

Lean = bad,
Rich = good.

 

well good and bad. I dont have a white wire at that c-16 pin, i mean theres a wire there but its not white and its in the middle of the hardness. It is a ZC engine, so I'm guessing its a different hardness, i believe the car is an HF, but still, unsure!! any help greatly appreciated!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">

For some people, like me, that's all you need. I'm getting it tuned to get the A/F straight. Then, if i'm spraying and it goes to lean for more than a second, I can back off.

Lean = bad,
Rich = good. </TD></TR></TABLE>

i think you are the first person to ever point out a valid reason to have an a/f guage hooked to a narrowband. i didnt think of that when i made my post. the tricky thing now is not to be too rich. but it is very hard to run too rich in some cases. stock injector duration would max out before you got to a point where you are too rich. either way, good post.

 

X2

but do you know what wire I'm lookin for?

 

if by pcm you mean Engine Control Unit (ECU), then it is pin/wire c16 on a pm6 ecu. thats the wire that sends voltage from the o2 sensor to the ecu. thats for both dpfi and mpfi engines.

 

how can i check the wire at C16 at the ecu b/c i dont want to expletive anything up here. can i use a DMM on it to maybe see a different in a resistance of some sort? I'm not sure what ecu I have as when i bought the car they told me it has a Si computer that was computer advanced of some sort, but they didnt bolt it down and its got an "eye" in the middle of it so you can see the board inside it. its got 3 plugs, one that is kinda clearish and 2 black smaller ones. there are no markings on the clearish one if I remember correctly, but on the black ones only.

 

i might try that wire and see what happenes ya know. whats the worse thing, yea

 

Leave plenty of slack in the wire. (Don't cut it an inch from the ECU)

Cut it , splice in the A/F. If it doesn't work, just re-connect the two.

 

yea as you know, its been pretty gloomy and rainy today so I havent had a chance to try it, but I wrote down the pin# so we will see if that is the one

 

Narrow band A/F guage? Just another really good light show. If you really want to know A/F get a wideband.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D16SohcVtec &raquo;</TD></TR><TR><TD CLASS="quote">Narrow band A/F guage? Just another really good light show. If you really want to know A/F get a wideband.</TD></TR></TABLE>

It serves a purpose. Tells you if ur running rich, stoich, or lean. That's it. It doesn't tell you how lean or how rich, just that it is one or the other.

 

I have always just wanted to try out an a/f gauge, so hopefully it just does something for now.....tomorrow

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">

It serves a purpose. Tells you if ur running rich, stoich, or lean. That's it. It doesn't tell you how lean or how rich, just that it is one or the other.</TD></TR></TABLE>


exactly. works for me for now.

 

well hopefully tomorrow is a better or at least nicer day outside so i can check that wire

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by STREETWERKZ &raquo;</TD></TR><TR><TD CLASS="quote">


exactly. works for me for now. </TD></TR></TABLE>

Also, A/F guages are useless during part throttle driving. The ECU does some loop program so it just blinks back and forth. Only when you're WOT does the A/F guage show you what the engine's running at.

 

Ok, i had a hard time starting the car today, so hopefully tomorrow. but i have a new question and dont really want to start a whol enew thread. I wanted to know what ECU is the PM6 ecu? Is that a normal honda crx ECU or is that a different one? When i bought the car, they said it was a much better ecu, but i dunno. SO what is your take on that?

 

so i guess i might have to start a new thread for the question huh

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spluvs2install &raquo;</TD></TR><TR><TD CLASS="quote">Ok, i had a hard time starting the car today, so hopefully tomorrow. but i have a new question and dont really want to start a whol enew thread. I wanted to know what ECU is the PM6 ecu? Is that a normal honda crx ECU or is that a different one? When i bought the car, they said it was a much better ecu, but i dunno. SO what is your take on that?</TD></TR></TABLE>

PM6 is the ECU for a D16A6 engine. They came out of 88-91 CRX and Civic Si's.