2jzfc

As the long title states, I need help figuring out where these engine harness plugs go as well as what to do with these few vacuum ports...

First off the car is an 86 Sport with an 88 vert N/A 13b, also this is my first rotary powered car and my very first time dropping a rotary in a car.

Also before I dropped the engine in I removed ALL of the emissions and used block off plates where they were needed. The rats nest is also gone as I followed this How-To:

Rotary Resurrection home of the budget rebuild.

So I capped all the vacuum ports it said needed to be capped, and removed everything it informed to remove. So I do know not all of these engine harness plugs will be used, but I wanted to make sure I used up all the ones I needed to, and have them in the appropriate places.

1. First picture is the bottom of the radiator where the radiator hose goes into, there is this smaller hose coming off of a water port above. I have no clue where this goes, does it go anywhere? Or do I just need to cap it off:


2. This plug is on the passenger side on the same loom right before the plug for the MAF, no clue where it goes:


3. These plugs are on the same loom as the pressure sensor plug, once again no clue where they go:


4. This as you can see is the FPR on the main fuel rail, the vacuum line can I plug it into any open vacuum port I can find? Or am I missing something here?


5. Passenger side by the firewall, that curved port pointing toward the hood, what is it? What goes here? There is also a white plug you can see I can't find a home for.


6. Driver side ignition pack behind the headlight, and the fuse box all of those plugs. What do I do with them if anything?


7. On the back of the UIM not sure if I do anything with this plug or not:


8. Coming from under the IM next to the oil filter, I'm going to guess these are grounds? If so I can ground them to the block maybe?


9. The yellow with red strip wire I'm touching, the wire is coming from under the UIM and I'm assuming goes to the smaller sensor under the oil filter? If not where does it go, and what wire plugs into the smaller sensor?


10. Driver side engine harness, yellow wire with red stripes, end is broken off what did this go to?


11. All of these plugs, driver side engine bay from under the UIM. I'm going to guess most of these went to the emissions crap I removed, but if not where do they go?


Any and all help would be great, I'm so close to firing this up for the first time but I want to make sure I have everything where it needs to be. If there are any questions about some of the wires and vacuum ports I can take better pictures or answer/describe the best I can.

2jzfc

In picture 5, the upwards turned port and white plug. I think I figured out what the white plug is, that's for the o2 sensor right? Still don't know what the upturned port is though.

DC5Daniel

iTrader: (10)

1. Heater core hose, it should attach to a hardline which is bolted on the passenger side of the frame.
2. Looks like a test connector, I've never seen one with a rubber boot over it though. Regardless, there's nothing import up there besides the AFM.
3. the 6 pin plug is for the AAS (auto adjusting suspension), if equipped.
4.
6. Again, AAS and what looks to be some other unused connectors.
7. Emissions related.
8. Ground to block is fine.
9. The wire you're touching should have a female bullet connector on it. It will plug onto the small coolant temp sensor nipple in that area under the filter.
10. The wire with the broken connector should have slid onto the oil presser sending unit (mushroom looking thing under the oil filter. Unfortunately it's a weird slide on connector, you wont find a replacement unless from a donor car.
11. Rats nest crap.

2jzfc

You are freaking amazing! And answered all but picture 10, if you look at picture 9 you will see I already have the connector for the oil pressure sending unit. The broken wire has to be something else, I'll try and take a better picture of it tomorrow. But everything else answered what I needed to know. You are a God among men good sir!

*EDIT* Also #5 what is that hardline turned up facing the hood?

clokker

iTrader: (2)

The port is vacuum for the brake booster.
The O2 sensor has only one wire, so that connector isn't it.

DC5Daniel

iTrader: (10)

Sorry, it's hard to see. Then the broken wire should be the coolant temp wire, which just has a female bullet connector on it. However, I think a standard bullet is a little small so it may take some serious force to spread it onto the sensor.

2jzfc

You guys are awesome! OK got a couple more pictures, the first picture is a little better one of the broken wire. Is there more than one coolant temp sensor on the driver side? Or do I have the wrong wire plugged into the coolant temp sensor below the oil filter?


The second picture is a new thing I've discovered now... Before I thought it was a port on the back of the block that went to he heater core. But with the new info above showing me the real heater core hose I am now not sure what this is. It is located on the passenger side rear of the engine, it looks like a water port to me.


Thanks again for all of your guy's help seriously!

blackedoutFC3S

iTrader: (7)

The sensor below the oil filter is the oil pressure sender. Is the first pic with the wire yellow with a red tracer?

Second picture is the split air pipe that runs to the catalytic converter, It's for the 5th and 6th ports.

clokker

iTrader: (2)

I think the broken Y/R wire is for the oil pressure system condensor.

2jzfc

In picture 9 the wire I'm holding is yellow with the red tracer, it has the female bullet plug and I've got it going to the smaller lower sensor under the oil filter. This wire originates from the harness under the UIM.

The broken wire in question is also yellow with the red tracer. It originates from the engine harness on the driver side of the bay.

As for the split air pipe, what do I need to do with it? I of course do not have my cats anymore, do I plug it up? Or just leave it alone?

2jzfc

Oil pressure system condensor?! This is one reason I shy away from learning a completly different type of car than what I'm use to. All the new terms and parts I've never dealt with before lol.

clokker

iTrader: (2)

It's a little black box (condensor), usually bolted to the clutch slave cylinder flange, that protects the oil pressure gauge from voltage spikes.
They frequently go missing and everything will be fine as long as that broken wire does not touch ground.
So, either replace the condensor or tape up that broken wire.

2jzfc

Ok did a bit of research on the split air pipe, and I'm not liking what I read... I got this car it already had an aftermarket exhaust with RB header. So there is no way currently to hook up the split air pipe to send back preassure back to activate the 5th and 6th port. Here is where I get confused. Obviously with no 5th or 6th port the car will be slower. I read I can wire the ports open all the time, but will have crappy performace sub 4000 rpm. I didn't see a real solution except to put the air pump back on with a factory exhaust. Is this the only real way to fix this issue?!

2jzfc

Ok great I'll see about replacing the condensor box, mine is very much missing.

2jzfc

Man the more I read about the 5th and 6th port and split air pipe, the more I regret not doing my research before removing all the emissions from this engine. LESSON LEARNED PEOPLE DO YOUR RESEARCH! If I knew the air pump also opened up those ports above 3800 RPM, and by removing all of that I've lost 25hp above 4000 RPM I never would of done all of this work, and I'd probably have a happily running RX7 right now. Instead of dealing with the crap I'm dealing with now lol... Oh well.

It really is a good idea to leave these cars pretty much stock, with stock exhaust, and stock engine for the N/A anyways. That is what I'm starting to figure out anyways.

clokker

iTrader: (2)

The mistake you- and many others- have made is confusing "emissions controls" with "engine controls".

Put the air pump back on, your ports will work and the water pump will appreciate the extra belt.

2jzfc

Yeah I went the extra mile in getting the double belt pulley for the alt, but I was at least smart enough to keep the original pulley for the alt. I just need to get the air pump back on, and everything that goes with it and then drop money on the RB presilencer then go ahead and clean the ports/actuators and should be in good shape. I need to find a split air tube never had one since I've owned this car.

2jzfc

Got the air pump and split air solenoid valve re-installed, but now have a big problem. I cannot find the wires the air valve plugs into, and I cannot find it in the FSM I downloaded. Anybody got a picture they can post as to where the plugs are located on the engine harness for it?