I am swapping in a complete 97 GSR motor and tranny into my 94 LS..i am using the 97 harness to go with it but i noticed that on the passenger side shock tower the GSR harness has 4 connectors while the LS had only 3. the extra connector is a 3 wire connector. what is that extra connector for? also the previous owner of the GSR motor took out the stock dual runner manifold and swapped it for a AEBS instake manifold so now there are extra connectors that are not plugged. My question is how many extra connectors should there be?..Thanks in advance for any help and yes i already tried doing a search...

 

Not positive about obd ii 97 engine, but obd i gsr engine has vtec solenoid, vtec oil pressure, iab, and knock sensor. These wires and connectors will be missing from on an ls chassis. Rywire and Hasport both make sub harnesses for this swap.
If you do go with one of those, Hasport is more expensive, but the quality seems better. However, I've been using the Rywire sub harness w/o problems for over a year.
Also, are you using the obd ii ecu from the 97 gsr?

 

well those 4 wires i already have wired up..if you look at the passenger shock tower there is usually 3 plug connectors but on the GSR harness there is a 4th connector plug with 3 wires..im running a 95 gsr ecu (p72)

 

Sorry, don't know which one it is. Is it in this photo:




Or do you have any pics?

 

yes..it is the last plug all the way on the bottom..

 

Not sure what that goes to. What color are the wires in the gsr connector?

 

I am not a genious here, but I have done my fair share of swaps, and I honestly think it is for IABs, as it is not found on anything but gsr models in integras. The wire color appears to be the same, but as far as I remember '96 and up gsr have a three wire 4th plug, while '94 and '95 have a two wire fourth plug. That's the one issue I am having with saying it is for the IABs. I will see what I can find!

 

Thank you both for your inputs. Here is what i found on that 4th plug..The wire colors are as follows:
1)yellow/red
2)blue/red
3) white/red

if indeed these wires are for the IAB's then i will just forget about it since i am no longer running the stock manifold anyways

edit*
I actually did some wire researching and i think the blue/red is the CKF sensor wire and the white/red is the ckf sensor ground..if i'm right i dont need to worry about that since i'm running an obd1 p72...can someone confirm this info on the wiring?


Modified by shadydb7 at 4:19 PM 11/13/2008

 

Could be, but I have that plug on my OBD1 GSR harness, and I don't believe OBD 1 systems have a CKF sensor...hmmmm?

 

automatic wire harnesses have 4 plugs

5 speed harnesses have 3

im not sure but im pretty sure.

could you possibly have an auto harness?

 

GSR harnesses also have four plugs, and they never made an auto GSR in the U.S...I promise!

 

so....nobody knows wat that 3wire plug is for?