85crx509

sup honda-tech.r's

im having trouble with my 02 censors.
the engine light comes on and i can feel the engine bogging down while im driving.

ok here goes this is my o2 censor setup on my 90 ls engine in an SI,
both of my o2 censors are single wire, dont know if some come with dual wires.
Both of the censor wires are connected together, then another wire is connected to both of those wich is connected to my SI harness.
does this make any sense to anyone and is there a better way for this connection
to happen?

but my main concern is, it giving me the engine code because of the way it is wired
or because the censors are just bad..

could the 2 censors be in some way canceling one another out?

for sure im gonna replace the censors but i would like some help on this befor i go and disconnect anything.

i will post some pics 2marrow when i get home from work.

sleepingciv

iTrader: (2)

i might be wrong but doesnt the 90 ls use one o2 sensor?

85crx509

the header that is on the engine has 2 sensors.. should it have only 1?
should i replace only 1 then? which one?

sleepingciv

iTrader: (2)

i think pretty much all headers have 2 spots for o2's cause they fit many cars...

Im pretty sure that you only need one i woud change the one closes to the head, and just unplug the other one. Got to the parts store and they can tell for sure howmany ya have for a 90 ls.

its not vtec right??

zrickety

iTrader: (1)

b16 has 2 sensors...thought the b18 had one? i would just leave #1 hooked up to the harness and disconnect the other. see if your code goes away.

if it needs 2 sensors like the b16 then you need to run an extra wire to the ecu

ivanson

i also beleive you should only have one 1 wire o2 sensor????? on pre obd
[obd0]. i dont think obd0 had a o2 that monitor after the cat??? or correct
me if i wrong.

sleepingciv

iTrader: (2)

ya i think were right guys 1 o2.
I think since the header had 2 spots for one he ran 2 of them.

ivanson

yea. just remove the second one and plug it. or hey just disconnect it the wire
and its pluged already.

85crx509

i wanna thank all u guys for the help.

ok so i disconnected one wire but and just left one sensor connected, but i didnt remove the other one.
i went for a drive and the check engine light came on again , damn.
2 marrow i will connect the other one and test drive with that one connected, and see what happens.


Modified by 85crx509 at 7:05 PM 10/28/2008

sanimalp

what was the other sensor hooked up to? and what code are you getting? a code 1? what ecu are you running? because you can run an obd1 ecu with a b18a just fine and that will require 2 o2 sensors..

tico

here might be ur problem. the d-series non vtec motor for th efs run a single wire o2 sensor. ur running two sensore splice together. one is reading different the other and is confusing the ecu. replace o2 sensor nearest to the head with a honda oem o2 sensor reset ur ecu and u should be good

traxxasx

Your obd0 your ganna need 2 o2 sensors singal wire. Now you need to wires them both up with SEPERATE wires to the ecu. Also i would go to autozone and get to universale o2 sensors for 90-93 acura integra. And replace yours. Reset the ecu and go from there.

85crx509

here is proof that i have 2 sensors and how there connectd. my pm6 ecu . now my ecu is thowing a code , is a code 13

IndySporty

PM6 ECU=one single-wire O2 sensor (other one not needed)
Universal single-wire O2= 17 bux at parts counter.
Swapped CRX without a CEL= priceless.
(You are losing a lot of power by using the PM6 ECU, you need a PR4)

D16SiHatch

code 13 is a barometric pressure sensor code. the sensor is located like above the ecu in the kick panel. its what gives your map sensor a base reading to compare to. if its messed up or unplugged that would explain a lot. but sense you are using the incorrect ecu i'm gonna go out on a limb and assume thats where the majority of your problems lie. get an obd0 pr4 then see how she runs.

85crx509

thanks guys im gonna go purchase an o2 sens. today

whats the street value for a pr4?


Modified by 85crx509 at 1:41 PM 11/1/2008


Modified by 85crx509 at 1:51 PM 11/1/2008

143MYVTECEF

25-50 bucks for obo0 pr4

accordaffair

On a pm6 I think that's a code 1 and 3, not 13

harmonator84

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accordaffair &raquo;</TD></TR><TR><TD CLASS="quote">On a pm6 I think that's a code 1 and 3, not 13</TD></TR></TABLE>
Looked like a code 13 on his ecu video.
I personally am having the same problems with my LS swaped crx. But I only have 1 o2 sensor. Hope you find out what the problem is so I can fix this myself.

accordaffair

My PM6 on my si doesn't communicate in 10's and one's, if you have a code 13 it blinks 13 times

traxxasx

You guys cant read you have a..

CODE

1.
1
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 Oxygen Sensor "A" (Primary)
defective circuit or unplugged / defective sensor


AND


3 3
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 MAP Sensor (Manifold Absolute Pressure)
defective circuit or unplugged / defective sensor

85crx509

ok from all the info everone has povided i finally brought myself to think of a few things i hadnt before ...

1. i most likely have the wrong headers wich have 2 sensors.

2. i have the wrong ecu.. in need of obd0 pr4.
but i dont see how having the wrong ecu would give m a code 1.

now if i do need the 2 sens. im gonna ask

traxxasx to do a write with details on that..

so i went to schucks and picked a uni. sensor.
and installed it.


supplies


installed and soldered some xtra 12 gauge to it.


connected to harness

85crx509

ok after all the work im still getting code 1