Hi, i have a 2000 Civic Si... i bought the car with everything but the engine. I also bought a 2000 GSR engine which is a B18C1 which came with a p72 ECU and the wiring harness.... i have mounted the engine and everthing... but now im stuck!!! i dont know how to do the wiring..... Can anyone please help me? I want to get this car up and running but dont know how to wire this ecu to the 2000 si....

 

do some research. read. use the search feature. i can help but im far from you. KENT.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by igt7 &raquo;</TD></TR><TR><TD CLASS="quote"> i dont know how to do the wiring..... Can anyone please help me? I want to get this car up and running but dont know how to wire this ecu to the 2000 si....</TD></TR></TABLE>

You need an engine harness from ideally a '99 - '00 Si, but any '99 - '00 civic harness will do, there will be more wiring involved though. If using a '99 - '00 Si harness you will need to wire only the IAB if desired. If using a '99 - '00 EX harness i believe you will need to change the distributor plug and add the IAB wiring, you may have to lengthen some wires to reach sensors. If using a CX/DX/LX engine harness you will need to swap the distributor plug, add the vtec wiring, add the knock sensor wiring and the IAB wiring, you may have to lengthen some wires to reach sensors You can not under any circumstances use the GSR harness you have, you should be able to sell it though.

 

what does the IAB sensor do?? im asking cuz i never put that or wired something like that in my gsr swapped Si

 

There are 2 seperate paths inside the GS-R manifold, the Intake Air Bypass allows incoming air to choose the path most favorable depending on the RPM. Basically this allows you to make slightly more torque at low RPM. A lot of people use an aftermarket intake manifold and chipped P28 though.

 

Thaks for the reply. I really appreciate your help.... So from what you said... correct me if im wrong... all i need to do is get a 2000 si harness wire the IAB and everyhing should be fine? Will the connectors on the ECU and the B18C1 work with a 2000 civic si harness?? If thats the case, then that is way awesome....

 

Have you done any swaps before??? Any idea if i can use the 2000 si harness with a gsr ecu and b18c1?

 

the p72 ecu will not just plug into the factory si ecu plugs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by owa &raquo;</TD></TR><TR><TD CLASS="quote">the p72 ecu will not just plug into the factory si ecu plugs</TD></TR></TABLE>

If its a 2000 ECU it will, '99 - '01 integras are OBD2B and have the same ECU plugs as '99 - '00 Civics.

 

He is correct but the problem there is that there have immobilizer chips to not send fuel into the engine. It can be beaten Ive seen it many times but I don't want to post anything on here that might promote theft so search for it I cant help you there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slvrcvc93 &raquo;</TD></TR><TR><TD CLASS="quote">He is correct but the problem there is that there have immobilizer chips to not send fuel into the engine. It can be beaten Ive seen it many times but I don't want to post anything on here that might promote theft so search for it I cant help you there.</TD></TR></TABLE>

Your right, i forgot all about the immobilizer. It can be removed, but it might end up being cheaper to get an earlier ECU without it and just buy an OBD2A to OBD2B conversion harness.

 

Once again hes correct it would be the easiest way to put the motor running on the platform with all it intended goodies!

 

Hey is there anyway i can call one of you guys that knows alot about swaps... this is my first time.... and im anxious to get my car up and running... i have several questions and it would be sick if i could talk to one of you guys and get some help.......
Thanks....

 

i heard if you had the papers for the engine and ecu, you can bring it to a honda/acura dealer and they can disarm the immobilizer.. i dont know how true it is, but maybe its worth a shot?

 

Ive done a 97 gsr swap obd2a into my 97 civic ek hatch.. its really easy. since you have a 2000 motor with a 2000 car, then you need a obd2B engine harness.. either get a 99-00 ex MANUAL harness or a 99-00 si MANUAL harness. you dont even have to wire the IAB. its not gonna affect the ecu in anyway. speaking of ecu, I hope its a JDM 2000 ecu because those dont have the immobilizers. if its a usdm then I say you get rid of it and get a jdm p72 obd2b ecu or an older p72 obd2a ecu but youll need a conversion harness to convert from obd2b==&gt;obd2a which goes for only like $40 bucks on ebay.
hope Im not confusing you too much.. just pm me if you have a question

 

How do i find out exactly what kind of ECU i have??? I know that its a p72 off a 2000 GSR.... but how do i know if its obd2a or a obd2b??

 

its it a small square box or a large rectangle box? if its a small square box then its obd2b
well I have a usdm obd2b ecu and ill read the serial number if it helps
37820-p72-A05
8U

 

also you can look at back of the ecu.. there are 4 ports.. we call it A, B, C, D
A is the furthest left and D is the furthest right.. obd2a uses A, C, D while Obd2b uses A, B, C. also an automatic ecu will use all 4 ports and you dont want that.

 

Ok so know that i have a obd2b ecu, but i wonder if my ecu is JDM???? My vin number on the GSR engine starts with a J.. i have heard from people that when the vin number starts with a J it means its a JDM..... so if my engine is JDM.... then my ecu should also be JDM.. cuz it came off the same car.... is this possible? or am i just mistaken?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by igt7 &raquo;</TD></TR><TR><TD CLASS="quote">Ok so know that i have a obd2b ecu, but i wonder if my ecu is JDM???? My vin number on the GSR engine starts with a J.. i have heard from people that when the vin number starts with a J it means its a JDM..... so if my engine is JDM.... then my ecu should also be JDM.. cuz it came off the same car.... is this possible? or am i just mistaken?</TD></TR></TABLE>

I think misinformed would be the word, if your VIN starts off JHM it means the car was assembled in Japan This does not make it JDM it simply means it was assembled in Japan and shipped over. JDM means the car was built for the Japanese domestic market. A JDM car could have been built in Canada or the US and it would still be a JDM car, by the same token a civic built in Japan for the USDM market would still be a US car. What exactly did the swap come from? If it was a standard left hand drive GS-R its not JDM.

 

if it says j it just means its ffrom japan. My car says j too but it says honda of canada on the core support. your mistaken, just because of the vin reason. It still might be jdm, iunno. check the motor, does it say b18c1 or b18c?? if it says b18c then your motors jdm. are you trying to make the ecu fit on the car? or figure out where the plug goes? or just wanna know how to wire everything else in so you wont get cels?

 

Yeah its a standard left hand GSR..... so now im basically up against a wall... because if i get use a si harness, then the imoblizer will prevent me from starting up the engine...

 

Im just basically trying to figure out whats the best... and easiest way to wire my car so i can start the engine and get it running... if you read the first post you can see what parts i have and what im working with.... but from what i have read throughout the posts i wont be able to start the car because of the immobilizer in my ecu... ... correct me if im wrong...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by igt7 &raquo;</TD></TR><TR><TD CLASS="quote">Im just basically trying to figure out whats the best... and easiest way to wire my car so i can start the engine and get it running... if you read the first post you can see what parts i have and what im working with.... but from what i have read throughout the posts i wont be able to start the car because of the immobilizer in my ecu... ... correct me if im wrong...</TD></TR></TABLE>

You could get an earlier ECU '96 - '97 i believe don't have the immobilizer, you need a jumper harness though. or you could get the immobilizer removed, this can be pricey i believe and you may have to go through a licenced locksmith to get it done.

 

to tell whether your ecu is jdm or usdm its simple.. after the p72 serial it either starts with a letter or a number. a letter after p72-A06 means its a usdm ecu. a jdm ecu would be P72-001. you see how it starts with a number? for example mines is 37820-P72-A05 therefore its usdm and not a jdm ecu and it has an immobilizer