95boostedh22

so i have a 98 ek hatch.. It has a 2000 sohc vtec motor

i want to use an obd1 ecu but heres my problem,on the ecu hardness inside the car i only have (2) connectors plugging into my ecu....what can i do and what step down hardness do i have to buy? obd2a or obd2b


also would i have to change my distributer?

95boostedh22

bump this ttt

LA_HONDAS

obd0 =88-91 / obd1 =92-95 / obd2a =96-98 / obd2b =99-01

95boostedh22

so if i buy a obd2b to obd1 i will be good?

Relic1

98 civic = OBD2a Unless it's been rewired for OBD2b....
but only two plugs is strange... there should be three, and one in the ECU that you do not use.

take pics of the plugs and wiring if you can.

LA_HONDAS

if you don't know witch one you need bring it to your local shop and let them look at it for

your car is a 98 so you'll need obd2a

and obd2b motor harness will not work in a 96-98 without changing the dash harness to 99-01 i know this for a faq i been there and done that

95boostedh22

ok i pulled out the hardness that goes inside the firewall into the ecu and i found 2 plugs that plug into the ecu (grey and blue connector) and also next to it is the green connector....

Now about 1 foot down the hardness i found a brown connector taped around the hardness with a cover over the plug with 17 wires??
also inside the cabin attatched to the other green plug i have another connector that is capped off and its (red)?


I believe this is a obd2b engine hardness with obd2b motor

where can i locate the missing "a" connector??

LA_HONDAS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95boostedh22 &raquo;</TD></TR><TR><TD CLASS="quote">ok i pulled out the hardness that goes inside the firewall into the ecu and i found 2 plugs that plug into the ecu (grey and blue connector) and also next to it is the green connector....

Now about 1 foot down the hardness i found a brown connector taped around the hardness with a cover over the plug with 17 wires??
also inside the cabin attatched to the other green plug i have another connector that is capped off and its (red)?


I believe this is a obd2b engine hardness with obd2b motor

where can i locate the missing "a" connector??</TD></TR></TABLE>

yep that a obd2b motor harness and that plug thats missing is on the 99-01 dash harness

you need a 96-98 motor harness and you good to go

time to hit up junkyard or ebay or local shop

btw it cost 450 new from honda

95boostedh22

i found a 97 dx hardness.....will everything plug right in including distributer and all?

btw i also have a 2 wire ivac do i have to change anything with the 96-98 hardness? also what about the knock sensor?

LA_HONDAS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95boostedh22 &raquo;</TD></TR><TR><TD CLASS="quote">i found a 97 dx hardness.....will everything plug right in including distributer and all?

btw i also have a 2 wire ivac do i have to change anything with the 96-98 hardness? also what about the knock sensor?</TD></TR></TABLE>

that will work you just gotta add vtec and vtec pressure switch

and you mite have to rewire for 2 wire ivac

ill post a link to show you how to do it

LA_HONDAS

got it for you

LA_HONDAS

what obd1 ecu you gonna use cuz you mite not need to wire up a knock sensor

95boostedh22

either p28 or p72...and Thanks for the pic!

I have one last problem...i got the harness plugged everything in but no i have a problem with the distributer plugs are different....i tried searching but didnt find anything to help me with my conversion issue

LA_HONDAS

there was a conversion wright up on it but i can find it

http://ff-squad.com/technet/wiring.obd2a.htm

plug A a20 is for the dizzy

plug D d1-d2-d3-d4-d11-d12-d13-d14 is for the dizzy


and i forgot witch one is witch on those two ckf(d1-d11) and ckp(d2-d12) one of them go's two the dizzy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95boostedh22 &raquo;</TD></TR><TR><TD CLASS="quote">either p28 or p72...and Thanks for the pic!

I have one last problem...i got the harness plugged everything in but no i have a problem with the distributer plugs are different....i tried searching but didnt find anything to help me with my conversion issue</TD></TR></TABLE>

the p28 dont need a knock sensor but p72 needs one

if i was ill just wire it up just in case you need it

95boostedh22

i did the whole rewire from 3 to 2 wire but now i came into ANOTHER Problem!

from searching i believe i have an AT intake manifold so my problem is that i have a 3 wire iacv and i cant use it, What do i have to do or get to make this work?

LA_HONDAS

change the ivac to the one you need or rewire it for 3 wire ivac