what is the differnece between chuki zenki an kouki s14 sr20det wiring harnesses????

[geoff240sx]

ok so i bought an manual s14 sr motorset from this whack importer in canada "jdmplanet on ebay"... long story short they sent me wrong engine harness an there is no way they are going to send me the right one.

i dont mind spending the money on buying a brand new harness, i just need to know what harness i need to order, the options are chuki s14? zenki s14? or kouki s14?


what do i look for on my engine to determine the right harness?


also they gave me "WC in red lettering" ecu witch means zenki from what i have researched, but i cant just go off of that considering they sent me a harness that is not compatible to my sr20. so who knows if the ecu they gave is for my engine.

on the engine i have the tps sensor only has one female plug on it but the harness that came with my swap has a brown male plug the connects to the tps but there is a grey plug right next to the brown plug the dosnt plug in anywhere... i know that that grey plug is important because on my friends s15 sr it has both the grey an blown plugs on his tps and when you unplug the grey plug, the vvt makes a insain tapping noise.


these are the plugs im talking about, "my engine is all apart an being rebuilt due to shity compression results/ later to find 2 broked ring lands, this is why i say jdmplanet is a whack importer"






sorry for the poorly composed thread an grammar errors lol and thanks in advace to anyone who helps me figure out what harness i need to buy!!!!

[gijoe69]

S14 SR has VTC solenoid, S13 doesn't

[geoff240sx]

^ yes, im not asking anything about s13sr harness thogh.... i have an s14sr

[Sileighty_85]

that probably an Automatic Harness

The Auto Tranny engine use 2 plugs on the TPS

On a side note
looks like one of you fuel injector caps is comming loose

[geoff240sx]

Originally Posted by Sileighty_85

that probably an Automatic Harness

The Auto Tranny engine use 2 plugs on the TPS

On a side note
looks like one of you fuel injector caps is comming loose

you might be right, so they probably sent me an automatic harness, but what harness do i need to buy?


on thenismoshop.com the 3 choices are chuki s14sr, zenki s14sr, or kouki s14sr



The Nismo Shop : West Covina Nissan : Nissan OEM Engine Harnesses :: S13/S14 SR20DET

i didnt think they even made chuki s14 lol but thenismoshop.com aka westcovina nissan has that as an option

[geoff240sx]

Originally Posted by Sileighty_85

On a side note
looks like one of you fuel injector caps is comming loose

i know, i removed the stock injectors from the rail and sold them an didnt tighten the screws down afterwards

thank you for looking out though

[Sileighty_85]

I believe you can just swap over a A/T TPS and it should be fine

as long as you have the appropriate wire harness and ECU

[Enna]

I am curious to know this as well. How do you tell the difference between the engines and harness? I know on the kouki (and I believe chuki) harness the maf plug is oval instead of rectangle. You can use that as a reference.

[geoff240sx]

Originally Posted by Sileighty_85

I believe you can just swap over a A/T TPS and it should be fine

as long as you have the appropriate wire harness and ECU

that that would probably work, but i think it would be more of a pain hunting down a automatic tps an ecu plus this harness i have is already pretty hacked up...i would rather just buy the proper harness for my engine brand new and send it to yurry @ wiring specialties to service it to go into my s13 so that i know 100% the wirring is right

Originally Posted by Enna

I am curious to know this as well. How do you tell the difference between the engines and harness? I know on the kouki (and I believe chuki) harness the maf plug is oval instead of rectangle. You can use that as a reference.

thank you for that pointer. but my swap didnt come with a maf... im just going to use a z32 maf

[Sileighty_85]

there should be a serial number Tag on the ECU harness close to the ECU, if it does then you can find out what model it is


S14 Zenki Harness 24011-65F04
S14 Kouki Harness 24011-80F00

Originally Posted by Monooxide

a way to tell an S14 SR20DET(Zenki) from an S14a SR20DET(Kouki). Is that on the Zenki engines(93-96) the valve covers had Stud and Nut combination for the attachment, while in the Kouki(S14a) engines it used a Bolt and tapped hole in the head

[Enna]

I guess seeing how it doesn't have the maf, you can't check the plug. All I know is kouki harness wont work with zenki. Don't know the specifics, but they changed some things up.

Do you have any pictures of the head/valve cover? Might help in identifying what engine you have so you can get the appropriate harness.

[geoff240sx]

^^^^



kinda hard to see but... the head has the cooling fins like an s13 black top

[Sileighty_85]

for some weird reason someone wrote the word "Harness" on the valve cover in japanese but thats all it says

Whats the first part? is it (8) C70?

[geoff240sx]

really??? lol so the Japanese writing to the right says harness?


the letters in the middle says (f) cpo or (f) cpu i cant really tell in the pics, now the the valve cover has been cleaned an the writing has been washed off

[Sileighty_85]

Originally Posted by geoff240sx

really??? lol so the Japanese writing to the right says harness?

Youp thats all it say....weird

but according to Monooxied info thats a Zenki engine

[Enna]

^ He is right. Atleast according to monooxied. Pick up a zenki harness and you should be good to go.

[Sileighty_85]

what does the MAF plug look like is it oval or square?

Zenki MAF plugs are Square
Kouki's are Oval

Aslo what color is the ECU plug?
Ive heard Koukis are White
and Zenki's are blue

[geoff240sx]

Originally Posted by Sileighty_85

Youp thats all it say....weird

but according to Monooxied info thats a Zenki engine

yeah that is weird...

cool, that works out sence i have the zenki ecu already

thanks again man you have been a lot of help so far!

[geoff240sx]

Originally Posted by Sileighty_85

what does the MAF plug look like is it oval or square?

Zenki MAF plugs are Square
Kouki's are Oval

Aslo what color is the ECU plug?
Ive heard Koukis are White
and Zenki's are blue

the harness that came with my swap "one with extra grey tps plug" has a blue ecu plug an square maf plug... so they probably gave me the right harness but for an automatic sr

Originally Posted by Enna

^ He is right. Atleast according to monooxied. Pick up a zenki harness and you should be good to go.

thats what im going to do, cool now i can sleep good tonight lol

thanks again guys

[Sileighty_85]

Originally Posted by geoff240sx

the harness that came with my swap "one with extra grey tps plug" has a blue ecu plug an square maf plug... so they probably gave me the right harness but for an automatic sr

there ya go, sees everything in order now :P

[fliprayzin240sx]

I could have sworn the Kouki ECU plug and the Zenkis are different. You cant connect a zenki harness into a kouki ECU and vice versa. Kouki Harness and S15 harness are similar with the slight exception that S15 harnesses doesnt use igniter chip.

Thats what was explained to me before by the guy who tuned my PFC when I was looking for a PFC to put into my S15 engine set.

[Enna]

He already mentioned he has a zenki ecu though (red WC). They just gave him an auto harness with it.

[Sileighty_85]

Originally Posted by fliprayzin240sx

I could have sworn the Kouki ECU plug and the Zenkis are different. You cant connect a zenki harness into a kouki ECU and vice versa. Kouki Harness and S15 harness are similar with the slight exception that S15 harnesses doesnt use igniter chip.

Thats what was explained to me before by the guy who tuned my PFC when I was looking for a PFC to put into my S15 engine set.

What do you mean?

The WC ECU is the Zenki desho? and he has the blue plug ECU and Square MAF plug so that means its a Zenki harness with the zenki engine according to the Valve cover fasteners

[anotherblusi]

There are actually quite a few S14 variations that i've seen but the most common ones are these:

Zenki S14: Blue Ecu Plug, square maf plug, all other plugs the same
(There are some variations on the harness such as having multiple Black/Red wires on the M63 plug, but they all still use the zenki WC ecu)

Early Kouki S14: Blue ecu plug, oval maf plug, all other plugs the same
(Same as above, but I don't remember ecu code of the top of my head)

Late Kouki S14: White ecu plug oval maf plug, all other plugs the same
(Super rare harness. It is a cross between an s14 and s15. This harness comes on the latest model s14 engine but has similar ecu pinout as s15 harness)

And if it isn't obvious already, all sensor plugs on all s14 motors are the same EXCEPT for the maf plug which is either square or oval. So the only components that need to match up are the maf, engine harness, and ecu.

Also for the TPS issue, If the harness has a second connector, it is for the throttle position switch as opposed to the throttle position sensor which is necessary on all motors. You do NOT need to have the throttle position switch plugged in, so don't worry if your missing the dual plug tps.

[geoff240sx]

Originally Posted by anotherblusi

Also for the TPS issue, If the harness has a second connector, it is for the throttle position switch as opposed to the throttle position sensor which is necessary on all motors. You do NOT need to have the throttle position switch plugged in, so don't worry if your missing the dual plug tps.

i'm 99% sure that 2nd plug NEEDS to be plugged in, i unplugged that grey plug on a friends s15 then stated the engine, it idled normal but when i gave it any throttle it would make a terrible tapping sound coming from the vvt.... then plugged it back in an it sound would stop

possibly s15's require that plug to always be plugged in an s14's dont? or maybe youre saying if you have the single plug tps it wont matter if the 2nd plug is plugged in?


either way i still think im just going to buy a new harness because the one i have is has a few broken plugs an has been hacked up, looks like someone useto have some kind of piggy back wirred in before an did a poor job of repairing it

[Sileighty_85]

Originally Posted by geoff240sx

i'm 99% sure that 2nd plug NEEDS to be plugged in, i unplugged that grey plug on a friends s15 then stated the engine, it idled normal but when i gave it any throttle it would make a terrible tapping sound coming from the vvt.... then plugged it back in an it sound would stop

possibly s15's require that plug to always be plugged in an s14's dont? or maybe youre saying if you have the single plug tps it wont matter if the 2nd plug is plugged in?


either way i still think im just going to buy a new harness because the one i have is has a few broken plugs an has been hacked up, looks like someone useto have some kind of piggy back wirred in before an did a poor job of repairing it

here you can get the TPS if you get another Auto Wire harness
The Nismo Shop : West Covina Nissan : Nissan OEM Throttle Position Sensors - S13/S14/S15

But im sure if you ask yury he has a couple of plug laying around, plus im pretty sure he can repair that harness.
(Just trying to save you a few hundred bucks)

[wbarrett48473]

Doesn't the fins on the front of the motor mean that its a Kouki?

[Enna]

No. If you were to actually read, it would say its a zenki motor.

[anfitch2k5]

will either s14 harnesses,ecu, maf work on a s15 long block?

[andiqqqq]

Hi.
I bought the late zenki JDM ecu.
It is black WC.
I find that JDM late zenki harness has everything like early zenki harness but MAF plug is oval.
It's wierd but i cant figure out whts wrong with this ecu.
I run it on a s14 squareplug maf.
On a days i will fit s14kouki maf.
I'm wondering is it diffrent in sending signals.
The engine starts on this JDM ecu but i cant switch off the engine.
I take the key and it's still working.
It gets boost cut on 0.4bar.
On stock ecu everything goes to normal.

any idea?