S14 SR help please......

[CRZSWAP]

I have a Zenki S14 that I recently swapped a Kouki S14 SR20DET motor in. I had Yury from HeavyThrottle do the harness for me. After we completed the swap, we are not getting fuel or spark when we turn the key. We manually grounded the pump at the the fuel pump relay and the pump then cuts on but the car still will not start because it has no spark.
We assumed then that it was an ECU problem so I tried my ECU (which has a NA code) in my buddies S13 redtop car (which has a 63 ECU code) and my NA ECU cranks his car right up. So we then tried his 63 ECU in my car and still have the same problem with no fuel or spark.
We have checked all plugs to make sure they are connected, checked all fuses and relays and cheked the CAS. We have not set the timing on the car yet but that shouldnt matter as far as fuel and spark.Please help if possible

[khilgers]

bad ignitor?

[MavericStephenc]

check for bad ignitor chips.

[CRZSWAP]

Nope ignitor is fine.....even tried it in another buddies car. Any more suggestions?

[sbanzer123]

check your grounds

[CRZSWAP]

everything seems to be grounded.....I am lost...

[CRZSWAP]

Well I am being told that there is no way that my S14 ECU should plug into my buddies S13 SR. supposedly the to harnesses are not compatible? Which would mean that someone had to switch my harness and ECU on my motor with a a S13 harness and ECU before I bought it. But my ECU has a NA code which is a code for a S14 ECU and it plugs right in to my buddies S13 redtop.

WTF??

[kamikazekid]

Well I am being told that there is no way that my S14 ECU should plug into my buddies S13 SR. supposedly the to harnesses are not compatible? Which would mean that someone had to switch my harness and ECU on my motor with a a S13 harness and ECU before I bought it. But my ECU has a NA code which is a code for a S14 ECU and it plugs right in to my buddies S13 redtop.

WTF??
sounds like its the problem. Ive heard of people getting sr's pieced together. people just grab parts from different sr's and give it to you as a whole swap. try to get a hold of an s-14 ecu and harness ( I know, easier said than done) and try that. you could have an S-14 black top with an S-13 harness and ECU.:-/

[CRZSWAP]

sounds like its the problem. Ive heard of people getting sr's pieced together. people just grab parts from different sr's and give it to you as a whole swap. try to get a hold of an s-14 ecu and harness ( I know, easier said than done) and try that. you could have an S-14 black top with an S-13 harness and ECU.:-/

Well the only thing is, like I said, my ECU has a NA code which would be the right ECU for my S14 Kouki SR.That would mean that they had to swap the stickers on the ECU as well and that is highly unlikely.

[CRZSWAP]

Is there a specific way to tell what year motor S14 SR I have?

[CRZSWAP]

Wow....anyone please>?

[MavericStephenc]

I have an s14 sr and my ecu code sticker is WC.



WC is from a 94-98 S14 Silvia.

J4 is from a 97-98 180sx Type X 5speed.
62 is from a 91-93 180sx or S13 Silvia 5 speed
61,63 is from a 91-93 180sx or S13 Silvia automatic.

E5 is from a 94-96 180sx black top 5 speed.
E6 is from a 94-96 180sx blacktop automatic.



Edited by Kevin for readability.

[scperformance]

I have an s14 sr and my ecu code sticker is WC. E5 is from a 94-96 180sx black top 5 speed. E6 is from a 94-96 180sx blacktop automatic. WC is from a 94-98 S14 Silvia. 62 is from a 91-93 180sx or S13 Silvia 5 speed. 61,63 is from a 91-93 180sx or S13 Silvia automatic. J4 is from a 97-98 180sx Type X 5speed.

So then which ECU is a NA then? I thought 95-96 SR carried WC and another "W" code like WE i think and 97-98 SRs carried NA and NB ECUs.

Right????

[CRZSWAP]

So then which ECU is a NA then? I thought 95-96 SR carried WC and another "W" code like WE i think and 97-98 SRs carried NA and NB ECUs.

Right????

Thats what I was told as well and I did some researching and found other people with 98 S14 SR motors with a NA ECU just like me.

[Mattlanta]

Thats what I was told as well and I did some researching and found other people with 98 S14 SR motors with a NA ECU just like me.

I have the same setup... 1995 S14 chassis and a 1998 S14 SR from a Kouki half cut I have. The correct code for the ECU is NA, so unless someone changed the ECU sticker (which would be totally retarded) then you have the right ECU. Checking with a friend's car is perfect, but the part I don't understand is how your NA ECU ran your friend's red top!??

The problem I ran into with my swap was the same as yours and I found the issue was in my wiring. The fuel pump and start signal wires can get messed up because they have the same colors as other wires and can get confused. Once I took apart my harness and found where each wire was going I was able to get it right and presto!...3 months later mind you

Figure out why your ECU worked in your buddies red top and then if you have the right ECU and harness, and everything else you mentioned, I would have to believe your problem is in the wiring. Where did you get your ECU and original harness from?

[MavericStephenc]

I believe that na is just a reference for wiring. as stated on apexis' website, and instructions for wiring their electronics up it shows the s14 ecu as being an n3-a wiring format for the pin out.


http://www.apexi-usa.com/pdfWiring/16.pdf

take note of the pin layout and how its set into the coding (N3-A, N4-A)

also this may help
http://240sxmotoring.com/srwiecupiand.html

[Z U L8R]

the NA wiring is different than the WC. i just went over a friend's NA wiring cause he was having problems with his s14. it is different as far as wiring it into the f4/f3 plug.

s13 sr and s14 sr ignitors are the same.

if you were anywhere near GA i would recheck your wiring, but you may wanna try a cam angle sensor. or you can do this.

borrow a cam angle sensor, leave yours bolted in. plug the test cas into your harness. turn the key to the ON position, spin the cam angle sensor and see if you're getting spark. if you are, then plug it into yours and see if you're not, if you're not, then you know the cas is bad without taking yours out and having to reset your timing.

there is a little black ground wire with an eyelet on the subharness that goes to the coil packs, you might wanna take a test light and see if your coil packs are A getting power to them with the key ON, B getting ground to them at all times, C getting ground pulses from the ecu while you're cranking it to the signal wires coded as "E" on your coil pack.

there's not much free info out there on the internet on the s14 WC wiring and there's even less on the NA. if you're still stuck send me a pm.

Dave =]

[Mattlanta]

the NA wiring is different than the WC. i just went over a friend's NA wiring cause he was having problems with his s14. it is different as far as wiring it into the f4/f3 plug.

s13 sr and s14 sr ignitors are the same.

if you were anywhere near GA i would recheck your wiring, but you may wanna try a cam angle sensor. or you can do this.

borrow a cam angle sensor, leave yours bolted in. plug the test cas into your harness. turn the key to the ON position, spin the cam angle sensor and see if you're getting spark. if you are, then plug it into yours and see if you're not, if you're not, then you know the cas is bad without taking yours out and having to reset your timing.

there is a little black ground wire with an eyelet on the subharness that goes to the coil packs, you might wanna take a test light and see if your coil packs are A getting power to them with the key ON, B getting ground to them at all times, C getting ground pulses from the ecu while you're cranking it to the signal wires coded as "E" on your coil pack.

there's not much free info out there on the internet on the s14 WC wiring and there's even less on the NA. if you're still stuck send me a pm.

Dave =]

FYI, when I said I found the problem in the wiring with my swap, it was actually Z U L8R who found the last problem!!! He got mine going in one day!!! Trust me, follow his advice and you'll be running in no time!

[Z U L8R]

thx matt =] (matt has an s14 with an NA ecu)

lemme know when u get ur ac lines made.

gl crz,
Dave

[CRZSWAP]

:bow:Wow you guys are already life savers. Those are actually some of the first logical explanations as to why I might not be able to get it running other than the "Check your Fuses" and "Check for bad Grounds" suggestions I keep getting and I have gone over all that little stuff like a thousand times. I am going to pick up the car tomorrow from a shop in Spartanburg SC and I live in Columbia SC so I will check the CAS when I get it. As far as the harness, I sent it back to Yury(heavythrottle) so he could double check the wiring on it.

Ill let you guys know something tomorrow.

BTW- Im not far from Georgia at all and if it takes me making the drive for someone who actually has knowledge on my swap and could possibly get it running, Ill tow it to you in a heart beat! It has been swapped for 2 months now and no one can get it running.

[Z U L8R]

np lemme know man,
Dave =]

[CRZSWAP]

np lemme know man,
Dave =]

Where are u located in GA?

[eek]

NA ECU is for s14 Kouki sr20det motors 97-98 ( i have a 98 blacktop sr i pulled out of RHD kouki) that has a NA ecu
WC ECU is s14 sr20det Zenki motors.

Wiring is different for both ecus. I would hit up yuri and have him verify that the harness is wired up for a NA ecu.

Good luck tho, hopefully u can find out the prob. I think i also have the fsm for the s14 kouki. Let me know if u need it.

[Z U L8R]

Roswell/Marietta...GA =]

[seven.62]

be sure to check that when your ignition is set to on that your start signal wire is receving 12vlts (orange wire), also can you hear your ecu and fuel pump relays are clicking on? this will help you track down the problem. check that your cas and igniter is reciving voltage from the ecu. feel free to pm me as i have had the same problem when i was getting my swap done and i know how much of a bitch it can be when the damn thing just wont start. there are only certain signals that the ecu needs to see before it gives the okay for the injectors to fire and spark. Also i hope you have a multimeter to test these things because it will definately speed this up.

[CRZSWAP]

I just wanted to update.....I am just waiting on Yury to re-check the harness and send it back to me, then hopefully I can get it running. Hopefully he finds the prob in the wiring.

[CRZSWAP]

Still waiting on my harness from Yury.........

[sblack13]

he did the same thing to me. I paid $300 for a nice wrap job, worst money i've ever spent. Only to get in the car turn key and viola no ecu power or fuel pump power unless you grounded them or jumped the relays manually. I had a kouki harness, I unloomed it half the wiring was wrong. So I did it myself.

[jspecusa]

FYI the reason why we don't carry s14 sr ecu,maf, or harness is because people don't understand all 3 have to be matching so if you piece together the swap then you have more problem then saving money.
zenki S14 sr ecu, harness, and maf all have to be the same
kouki s14 sr ecu, harness, and maf all have to be the same
if one of them is wrong then you''ll have a problem.
also make sure your chasis is original a 5 speed not auto.
good luck,

sam

[CRZSWAP]

he did the same thing to me. I paid $300 for a nice wrap job, worst money i've ever spent. Only to get in the car turn key and viola no ecu power or fuel pump power unless you grounded them or jumped the relays manually. I had a kouki harness, I unloomed it half the wiring was wrong. So I did it myself.

well thats nice to know....I thought it was just me because I have only heard good things about his work but mine is def messed up. When I originally sent the harness to him, he said it would take 10-12 business days and it took him over a month! So I was not too happy from that. Then I get the harness in, and the car wont run so we tried everything we knew possible for troubleshooting but still had no luck. So then I took the car to a "SR specialty shop" and the tried everything and tested everything and told me the prob had to be in the harness. So then I called Yury(a month ago) and told him everything and he said he had a good idea what the problem could be and told me to ship him the harness back to fix it. Now he has had it for over 3weeks again. Between all the time, the 100$ labor bill from the shop, and the money spent on shipping the harness to him, I am getting very aggravated with the service! The motor has been in the car for 3 months and it is still not running because of this harness issue!

[CRZSWAP]

sblack13- was your motor a S14 Kouki like mine?

[-the.k.w.c-]

i had the exact same problem and all it was a bad ground in the engine bay ... scrape off any paint under your grounds and try again

[-the.k.w.c-]

and the other problem i had was the clip the clips the ecu to the harness wasnt on tight enought so make sure your harness is attached to the ecu

[CRZSWAP]

and the other problem i had was the clip the clips the ecu to the harness wasnt on tight enought so make sure your harness is attached to the ecu

All of that stuff what checked many times by many different people....I wish it was that simple.

[CRZSWAP]

Well I just received a email from Yury. This is what it said in exact words......

"Jim, i found the problem. Its a STUPID ground wire that connect to the intake manifold. It simply got pulled apart and did not ground the ECU.
Everything else is perfect.

I am sending the harness out on Thursday.

Hope it works and please let me know what you find."

So I guess we will see.. Thats pretty shitty if it was a ground in the harness this whole time:smash: