singleslammer

Alright here is the deal, I have a 99 civic si with a 96 integra gsr swap, and no I didn't do the swap I bought it this way. It ran good until recently and I started throwing check engine lights, the butterfly in the intake isn't opening and all kinds of gay ****. I need to know some info on if this swap combo is even a good idea, as in can I buy some wiring conversion from obd2b to obd2a and what engine harness would I use, what ecu would I run, all the inside stuff I need to know to make it work properly.

singleslammer

All the people on here and no one has any ideas?

v4lu3s

well its an EXTREMELY common swap. What else needs to be said? I mean whoever did it either did a **** job OR you have some damage that needs to be fixed....

singleslammer

yea, they did a **** job, and I am stuck fixin it. I just need to know what kind of harness to use and what ecu to use.

v4lu3s

if it was me i would get a 5 speed 96-98 civic ex 5 speed harness with 96-98 integra gsr ecu and mod the harness to fit.

slowpokecivic

iTrader: (1)

you can use the 96-98 ex 5 speed harness or look for another si harness but also buy a obd2 > obd1 harness and run with a chipped p28

D16SohcVtec

You could just switch over to OBD1 and run a P72 stock GSR ecu. But first you should really figure out what those CELs are and get them fixed if possible.

singleslammer

I am guessing the CEL's are coming from the shitty harness and shitty swap that was put in this car, there is a few plug-ins that aren't even plugged in and there is nowhere for them to go. I am just tryin to figure out what the best solution is and go with it so I won't get beat by sohc non-vtec d16's anymore.

duggy

Okay....I'm basically doing the same swap.

To do a swap in a 99-00 SI, you MUST use the 99-00 SI wiring harness. You cannot use the 96-98 EX harness or your gauges will not work correctly.

If you can, run a 99-01 P72 GSR ECU or, if you want to spend a bit more and have tuning capibilities, get an OBD1 P28 ECU with a conversion harness and have it CHIPPED FOR YOUR MOTOR. do NOT run the p28 un-chipped.

If you decide to go with the p72, you must wire up the butterfly valves and knock sensor.

singleslammer

Okay, so use the 99-00 si harness and a obd2-obd1 conversion harness with a chipped p28, but here is my other question, do I use the obd2a to obd1 or obd2b to obd1 conversion harness?

duggy

Use the 99-00 SI harness. Get an OBD2B -> OBD1 conversion harness.

singleslammer

So even though the motor is out of a 96, it is the ecu that makes it obd2a? So the 99-00 si harness will plug right up and I won't have to worry about the ckf or any of that because it will run off of an obd1 ecu.

singleslammer

Anyone?

Chrisfrom1986

iTrader: (1)

Find out what you did to it to cause this, or tell us what you did. There is no, "it ran fine until recently, for no ******* reason".

singleslammer

Alright, here is the deal, I bought it and it ran pretty good. I went through a little oil and took it to have the oil problem fixed. Well they said it was out of time. So they put a new belt on it and all that and fixed the valve seals. Well come to find out it ran like *** since then. I was looking and I knew instantly what the problem was,

1. The 99-00 civic si's were engine to ecu from the harness, my harness on there now has a shocktower removable harness on it, meaning they used the integra harness, which isn't right.

2. There is a conversion harness on the end of the integra harness and they are using the p72 gsr ecu, and I am pretty sure when you use the p72 you have to wire up the butterfly valves in the intake.

3. The is a plug-in that is just capped off for some reason, and it is a main plug in with yellow and black wires leading to it and there are several pinned in it, I have been trying to figure out what it is but no luck finding anything cuz most guys who have any capabilities with honda's would know to use the 99-00 si harness instead of the integra harness.

4. It has either a blox intake on it or some other aftermarket one. Doesn't that mean that you should not be using the original gsr ecu? I know for a fact that you have to use a itr throttle cable and bracket and neither are there, only thing they did was move the bracket over to only being held on by one bolt and used the original civic si throttle cable and I know they did cuz the original bracket is stamped with a p2t.

You guys get the picture yet? Whoever swapped this really sucks at life and should have never pulled out a motor if they don't know what they are doin, either that or they were in a huge-*** hurry and I am stuck fixin it.

5. It has an aem fuel rail and regulator and when I start it you can smell gas real bad like the pressure is turned up to high, and no there isn't a gauge on it, and yes I need to buy one.

6. The reason it is throwin cel codes is because of the wiring on it for sure. The motor is not bad, you can tell it has some ***** but it is being extremely deprived.

I will get pics up of the plug - in I am talkin about and hopefully you guys on here will know what it is because I know this swap is commonplace but like I said whoever did it did a hack job. When I first got it you could hear the butterflies open, then I took it in and they did a little work on it and now they open when the motor is still cold but not once it gets up to running temp, and it goes into it every once and a while and sounds almost like it's missing out, and it wants to fall on it's face in the mid-rpm range. I haven't turned a wrench on the damn thing, but I guess I am gonna have to fix someone else's mistakes, but eh, **** happens right, I can either cry about it or I can ask questions like I am from people who know and get this thing runnin right, and this is the only site I can think of that can answer my questions.


Modified by singleslammer at 6:53 PM 7/16/2006

singleslammer

If someone will host the pics for me I have pics of things that are wrong on it.

singleslammer

I know there has to be a guy on here who has done this swap before and can guide me in the right direction, I have had some good help so far.

GTlvr82

Look at the top couple of threads man....there is a link to hundreds of questions just like yours...it should set you on the path to nirvana.

singleslammer

I have searched this site numerous times, to no avail. So I am asking now, so if you aren't going to help me out then don't post.

kpop

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by singleslammer &raquo;</TD></TR><TR><TD CLASS="quote">I am guessing the CEL's are coming from the shitty harness and shitty swap that was put in this car, there is a few plug-ins that aren't even plugged in and there is nowhere for them to go. I am just tryin to figure out what the best solution is and go with it so I won't get beat by sohc non-vtec d16's anymore.</TD></TR></TABLE>

Im also doing the same swap. when hooking up the manifold did you have to modify any of the hoses/throttle cable? asking because the manifolds look totally different. thanks


Modified by kpop at 2:14 PM 7/17/2006

singleslammer

All hoses and such go to the relatively same place. You just have to know where to look and where to put them. I have an aftermarket intake on this motor so I had to go through and put everything back in it's proper place. Now I am just havin tiny annoying issues with it. Not enough to make me give up yet though.

singleslammer

God dammit, I decided to go out and figure out what the expletive was up once and for all. I started lookin around and there is a plug-in with a lot of yellow and black wires that is capped off, sounds like secondary runners to me. I figured out it does have the 99-00 si harness on it, but it has an obd1 ecu in it, wtf? So, I figure I am gonna try a chipped p28 and see what happens, if nothing good then I will suck it up and buy an obd2 motor and sell this one, which sucks cuz the one in it runs good, just isn't swapped good. Anyone have any ideas? I am fresh out.