Dijinnie's jdm k20a em2 build

So i got a few more pictures

First is my subframe, 100% free part (long story)



And today i was putting the harness i got which is from a base model rsx i got from TravisRSX on here.

The motor i have is a JDM k20a should be k20a3 from rsx equivalent from what i understand.

Im finding a few differences in the harness though, on both the Engine and Charge Harness.



You can see where they cut the JDM one out



Here's the one i got from Travis. I circled the differences in the JDM one.

Everything i circled is 100% different from what Travis gave me. Wondering if anyone knows or can tell me what it is.



So what i have circled in green is the male connector to what is circled green above. There is no connector here on this one because i pulled it off and put it on here... (also i labeled it k20a charge harness, its actually the engine harness was too tired when i edited the pictures.)



Here's a picture of the starter and the knock sensor, wondering if anyone thinks i should replace that sensor.



Now here is where one of the different parts this is the JDM k20a charge harness...



The wire with the metal connector there plugs into here....



Anyone know what that is or why that wire is there?

Very last thing is i have an extra plug on the Engine harness that isn't there on the JDM engine harness. Here's what im talking about.



Thats the base model engine harness with 2 clips, i BELIEVE that both clips are for the vtec solenoid not sure though.

here is the JDM clip, it has the same color wires going into it as the same labeled one above.



That is all for now if anyone could address my questions i would greatly appreciate it.

I live in texas and i bought JDM because its what i found for the best deal to be honest. Kinda regretting it a tiny bit but i dont feel like the differences arent ones that cant be overcome.

I HOPE im correct.

I've found out by searching so far that the starters are completely different from JDM k20a to USDM k20a3.

the USDM k20a3 has a wire that connects directly from engine wire harness to the S terminal on the starter. the JDM one has this extra clip goes to the same place ultimately. (they call it S terminal in the service manual)

the JDM starter is closer to the USDM k20a2 or k20z1 starter BUT the S terminal is on the back instead of the front.

I figured out the vtec plugs, wondering if i have to change solenoids to get it to work right with the USDM PND-A06 ECU.

Working on figuring out why the USDM connector from engine harness to Charge harness has 8 pins where the JDM one has 5 pins.

the USDM has a 3rd connector near the Altenator i cant figure out just yet. Thats where the extra 3 wires on the USDM one go.

I just REALLY need to figure out what that extra connector is for.

So here's what im looking at in the USDM Service manuals.





So the letter marked B is one of the wires i was confused about on the charge harness its the black wire with the white stripe.

My starter looks more like the k20a2 one here's another pic.





As you can see what i have circled in red is where the wire labled B plugs into.

So i've pretty much answered all of my own questions so far but i STILL cant find any information on this last plug...

If ANYONE knows what this last plug is for Please Please let me know! I have it circled in green here

BlackNDecker said:

I wish I could help you with your wiring dilemma, but the electrical stuff is something that I haven't gotten serious about learning

Click to expand...

Im workin my way through it slowly. I will find the answer and post it up for future people who plan to do the work as well.

Here's what i've found so far...



That shows the plug i was talking about, its number 11 in the picture.



Says here its for the IMT (IMRC) valve position sensor

which made me search further and i found this....



I believe this is where my mystery plug goes, however i dont know if my motor has it or not, im unfortunate enough to live about 40 miles away from where everything is stored and the work will be done.

After reading a bit more though i found this which makes me concerned a bit, looks like 2 different things but my motor for SURE has this plug.



but again that looks to me to be on a completely different place then the sensor itself.

Got intake and radiator coming in today, so i been going over my parts list and making sure i have everything covered before i start my work. I think i've got it all figured out but just going over fuel lines and heater hoses today and just looking for some input.

Heater hoses first. Looks like i can use the civic outlet hose but the inlet hose for the civic is much longer. Probably just going to buy the rsx one to make it easier but i'd like to know what you guys have done.

Now for the fuel lines. The xproductionz guide says to bend the pipes at the firewall to face like the RSX ones which is fine, worries me a bit to do this because of the possibility of kinking the pipe but shouldnt be a problem.

After bending the pipes what do you guys usually do? Do you keep and reuse the Civic fuel lines or buy the RSX ones? Im thinking im probably gonna buy the RSX ones but if you guys have successfully reused the civic ones that'd be nice to know, save about 75 bucks or so.