eastcoastdrift

Ok, a few questions here. Almost finished with a jdm s5 t2 swap into my 88 n/a using a s4 t2 harness and ecu. I remember reading a post a few weeks ago that went over some of the exact wiring questions i have but i caonnot find it, so i decided to just ask again, sorry if any of this is a re-post but i really want to get this car running. In picture 1. I have no idea where plugs 1.) 2.) and 3.) go, there wire colors are as follows, plug 1.) blk, red + blk, white. plug 2.) Green, Blk. and plug 3.) Tan. + Blk, white. In pic 2.) i am not sure about plugs 5 and 6. They branch off where the rear rotors fuel injector wires and plugs are. Wire colors are as follows, Plug 4.) Green, blk. + Blk, white. Plug 5.) Blk, white+ Brown, yellow. In picture 3 i am not sure about plugs 6 and 7. Both wires are yellow with red bands. The top wire is right above the fuel filter and the plug has broken off at some point, these wires come off of the body harness, so im not sure if they even hook up to the s5 engine. In picture 4. im not sure of plugs 8 and 9. 9 looks the same as 7+8 from pic 3 but this one comes off the s4 engine harness. Also a few other non wiring realated questions, first im not sure what to do with the TPS. I have a TPS from a s4 car, should i just use that? or should i splice in the wires and just use the TPS from the s5? Im not sure which will work best or which will work at all. Also could anyone tell me where the vacuum line from the Fuel Pressure Regulator goes to? And if anyone has a vacuum diagram for a s5 with emissions removal done that would be even better. One more thing, one of the pintle caps on my injectors broke. I have new ones coming tues. but would like to try and start the car before then. Is this not a good idea? i would just be idleing the car for a little while. Any help would be greatly appreciated. Thanks!!

HAILERS

For plug number one:

1. Black/Red and Black/White plug is for the Port Air Solenoid valve.

2. Green/Black is for the auxillary fan temp switch on the water filler housing.

3. The Split air solenoid has a WHITE wire and a black/white. I think that is the *tan* wire you posted except it ain't tan, it's white.


Plug number 4: Is probably not green/black. It's probably Light Green/Black and Black/White and is for the Air Supply Valve.

Plug 5 is for the Air Bypass Solenoid.

Others: The water temp sender has a Yellow/White wire.

Others: The oil pressue sensor has a Yellow/Red wire with a terminal fitting that is peculiar to only the oil pressure sensor.

The TPS could be made simple or hard. Depends on some things I can't control. If you swap throttle bodies the plug will fit the TPS. If you keep the series five throttle body then it's possible to use the series five TPS. You'd have to use just the LOW RANGE part of the TPS sensor. You'd have to determine which of the wires in the Series five tps plug are just for the LOW RANGE and NOT THE FULL RANGE. The FULL RANGE will not be used

The pintle cap is not needed for the operation of the injector. Do put it on someday though.

If you have a series four Turbo EMISSIONS harness in a non turbo, you NEED to do something. Something is to cut the BROWN/RED wire in one of the connectors on the EMISSION HARNESS. That plug is just inside the firewall on the passengers side. It is a Brown/Red wire in a yellow plug that has 15 sockets in it. Cut the Brown/Red wire about two to three inches back from the plug so it can be restored someday. Cap its bare end with tape or RTV.

That Brown/Red wire is the signal from the Boost sensor. If left as is, it will connect to a BW wire that goes to the METER FUSE. That is extremely bad. The METER FUSE will blow eventually and you will have successfully have put 12vdc on a 4vdc circuit to the ECU.

Don't misidentify the brown/red wire in the 13 socket connecto for the one in the 15 pin connector nearby.

HAILERS

I'd leave the series five throttle body WITH series five tps in place.

The TPS (series five) has two rows of pins. Two of the sockets on the top row are LOW RANGE along with one socket on the bottom. You are only interested in those three pins/sockets NOT any of the others.

Look at the series four harness plug. It has three sockets. The middle wire should be Green/Red. It should connect to the series five tps plug on the top row, far right.

The Brown/White wire in the series four harness plug should connect to the top middle socket on the series five TPS plug.

The Brown/Black (possibly pure Black) wire on the series four harness plug should go to the bottom right socket on the series five TPS plug.

To make this work, what you could do is cut three pieces of wire. Put a female socket on one end of each wire and a male spade on the other end of each wire. Then connect each wire to the ends I described above.

I'm almost positive I wrote the locations right. But only if your looking at the series five TPS plug from the NON wire side of the plug. In other words the connection side of the plug. Sorry, I don't know the wire colors on the TPS connector itself. They're not shown in the schematic. Maybe someday I'll attach a dwg/sketch.

I'm 100 percent sure I'd keep the series five throttle body WITH series five tps.

I've never ever seen a series five tps. So if someone has a series five and can look at the tps HARNESS side of the plug, from the wire side of the tps harness plug, he could maybe verify that the top right wire is GR, the top middle is BR/W and the bottom row far right is BR/B.

Just forget about the other three sockets on the series five tps. Leave them empty or for use with a SAFC at sometime.

Also ....using a turbo harness in a non turbo car, series four......your water temp gauge should not work nor your alternator since you won't have a plug for the alternator. You'll need to make a wire run from the jack at the back of the alternator to a fused source of 12vdc. I forget which pin on the jack on the alt goes to the fused 12vdc source. Someone else can tell you. Series five or series four alternator?????????

eastcoastdrift

Ok, thanks. I am running a series 4 alternator on the s5 turbo engine. Its the one off my 88 n/a engine. I belive that will work, i havent tried it yet though.

HAILERS

The alternator will work. What won't work is trying to connect a plug to it. It ain't there anymore if you put a turboii EMISSIONS harness in the car. You have to run a wire to the back of the alternator to a fused/switched source of 12vdc. It's the top pin on the back of the alternator.

Attached is a jpg of the series five plug and how you should configure it to match the series four TPS connector on the turboii harness.

EDIT: The jpg didn't make it. I'll try again later.

Icemark

as a first warning eastcoast. Bumps, anybodys, TTT, top the tops, or ^ are forbidden here in the 2nd gen section. Please read the rules sticky thread (https://www.rx7club.com/forum/showthread.php?t=456843) at the top of this section before posting.

Your bumps have been deleted.

HAILERS

Second try:

Anyway, just in case: the Air Supply Valve is on the back of the intake manifold. Cylindrical in shape.

Air Bypass Solenoid is mounted on top right of the intake manifold, near the BAC.

Split Air Solenod is on the ACV along with the Port Air Solenoid.

eastcoastdrift

Sorry but im still not certain what you mean with the alternator. Heres a pic, is this where your saying to run a wire to circled in red?

HAILERS

Here's another jpg. It's a picture of a wire with a male and female connector on each end. You'd make three similar wires. You'd have to cut the plastic from around the spade to make it fit in the RX connector or buy some male/female without the plastic covering.