Ok first i have searched and found nothing really realated to my problem. I sure there is but either i don't know what to type to bring up the problem or something.

Anyway here is the problem. I own a few jdm FD's. So my buddy wanted to know if I could help him out with his jdm engine swap in his US car. Sure no problem. So what he meant was could he drop it off with me and pick it up when it done. Even better.

So the tow truck shows up with the jdm engine already in with the US harness. I have searched and the harness should match up with a few left over connectors. I have 3 connectors left over and a pile under the dash on the drivers side(beside the clutch pedal). The ones in the engine bay are one under the intake manifold(2 pin) one more blue 2 pin connector by the air pump. One more singal black 1 pin clip type by the alternator and power steering pump. Meaning it can reach to the alternator and reach to the PSP. He also has a ground by the spark plugs that i don't have on my jdm fd so it seemed like it goes to the engine block. So that where i installed it.

Now on the inside by the clutch pedal there is a giant blue connector, a big white one and a smaller green one. Also a two pin white one. The fuse box is in and these connectors seem to go nowhere. I do not have a LHD car here to look at so is there something missing?

So what is all need to install a jdm engine in US car. I turn the key to the acces. position and i here relays clicking but no dash light, then turn to run and nothing, not even a click.

This buddy of mine bought someone elses piece of **** project car and now i'm dealing with it. I have no clue what's missing from the car, it has been in a collision so is the harness pinched somewhere, **** man. Any info on what is need to do the swap would help so i can start ruling things out.

 

Post some picture of the connectors and the general area where they go.

BTW does your friend has a USDM harness still? I'm guessing not because that would make like a lot easier.

 

Yeah he still has the US harness. I'm still searching info on the swap.

From what i've read the US harness should just plug into the jdm engine and there shouldn't be any problems trying to start the car. I don't know i got this car towed to me not running. So it's gonna be a fun one to figure out. It's like a big puzzle of wire and connectors under the dash without a good manual.

 

You can use the USDM engine harness with a USDM ECU Only.

In the JDM Harness and Ecu one or two things are read/wired differently such as fuel thermosensor, some oil pressure line etc.

Only major wiring to do to swap a JDM engine w/ harness into a USDM car would be rewiring one x-05 connecter.

 

This is the wiring required for the blue x-05 connector.

 

Ok, just re-read your thread and looks like you need more help than the normal swap.

- The three connectors under the dash near the clutch pedal should have nothing to do with the engine swap. They should just connect to their corresponding connector.
FSM(cough google cough) is your friend section Z/ wiring diagram/ front harness specifically.

- The blue 2 pin connector ( light blue) should have nothing to do with it starting. If i remember correctly it has to do with airpump/california emissions. There should be one other not connected under the UIM for EGR.

- Ground near the spark plug is probably from a 3k hesitation from the seq turbos old school rx7 owners did way back.

Before you crank to start. Remember to build oil pressure by taking out the EGI fuse and cranking for a few seconds.

 

\this is not what he needs. He's running usdm everything so no need for to do the rewiring for the x05. Make sure all connectors are plugging into fuse box. Also check the starter relay or bypass it to see if it'll crank.

 

Yeah he could just have a bad starter?? When he bought the car is was like this, not running. I'm gonna change out the starter today just to make sure. I just want to know what would be connected by the drivers kickpanel to use the big blue and white connectors. I think something is missing that i don't know about and neither does my buddy. I have to find a local LHD FD here to check what's missing if anything. I just couldn't see them making a car with gaint test connectors to tap into. This is what a few people have told me. That these cars come with extra connectors to test certain parts of the car. Maybe a 2 pin connectors not what i'm looking at.

 

Check grounds. The one on the front housing on the drivers side of the engine (usdm) is going to impact the starter. Without it connected i have had a similar no crank issue.

 

What year is the US model FD?

 

It's a 93. So the ground on the front housing it's part of the starter/tranny wire harness loom right? and goes bolts down at the front housing right? On my jdm fd i don't have a ground there so that's the only ground i was wondering about. I have it bolted to the front housing anyway because that's the place it made sense to put it. It almost fell right into place and lined up with the bolt hole so that's where i put it.

 

The reason I asked about the year is that the 93's had a cooling system recall. This added a jumper harness to connect up the additional fan control box (which was mounted to the ECU bracket). When you use a 94+ emissions harness, that 93 jumper harness isn't needed. If you use a 94+ emissions harness with the 93 recall jumper harness, you'll end up with extra plugs.

As for the ground wire near the spark plugs, you can either bolt it to the AC/PS bracket or one of the housings. Whatever works.

 

I have an update.....


This is a US fd and i have had 3 jdm fd's. I forgot that I had to push the clutch in to start the car!!!!**** I do it every day working at Honda.. With my Fd I'd always reach in through the window and start the car. Anyway there still is some issues with parts missing from the car, but it does run good. It's going back to the kid.

It's like trying to get a junkyard car going, it's not worth it!!I feel bad, but he just wanted the car running and wants it back. This was my first US fd to work on. It seemed alot easier, for the down pipe for sure. I have a steering column in the way.

Next time I'll know to push the clutch in.. ****

 

LOL wow so simple but so unexpected.

 

nice...

 

I don't want to hijack the thread but since it looks like 93 jdm fd solved his problem I am going to ask...

Mahjik can you tell me what does the jumper harnesses connector(s) look like? One connector to the obviously to the control box but was there another connection also? I know the recall had a short harness that went between 3 or 4 of the relays and the cooling fan connectors but wasn't aware of this harness. Can you give me any more information on it?

 

I don't have a picture, so I'm going off memory. IIRC, the jumper harness connected to 3 of the existing connectors off the emissions harness inside the cockpit. Then those three went to the ECU side as well as the extra connector for the fan control module (so basically there was 3 connectors on one side and 4 on the other).

 

Is it the same wiring change you would do if putting in a manual trans and using and auto harness or is it easier? I just bought a JDM engine/manual trans and was hoping for some info on the wiring aspect of things. Also, do you know if the JDM clutch and brake pedal works in US cars?

Thanks,

Top

 

im having trouble with the blue x-05 connector and i cant really understand what to do. i just dropped a JDM engine into my US 93 rx-7 and the blue connector from the JDM engine is bigger then the blue connector from the car itself. im lost and dont know what to do at this point or how i should rewire it.
as you can see im new to this...

 

Sir:

Did you resolve all your wiring harness issues when you put an FD3 JDM style into a USDM car.

I am in the process of doing that. I have a complete USDM chassis minus the engine. And I have a complete JDM FDS and wiring.

I like to know if someone has the information to make this trade.

 

https://www.rx7club.com/3rd-generati...s-spec-868289/