S14 SR swap done, one lil problem

[amp2345]

Just put in an S14 Zenki SR in my 95. Biggest nigh mare i ever had ... whoever made nissan electrical schematics must have been stoned out of his mind. i had pins missing where they were shown to be in teh FSM and some collors were nto even close.

I got it running. its great but i got no tach. i know i have the right L/B wire from cluster to F3 plug. b/c i checked continuity. and i got it hooked up to Y/B wire at pin 7 at ECU. Why it still wont work beats me. Is there some kind of a trick to this? There is not a damn thing about S14 swap issues of this kind that searched was able to find. heck there is nothing about S14 swaps at all but tons of dead links and people yelling at each other to start seaching :/

[TurK]

welcome to zilvia...thats why most ppl just buy the whole harness.

[amp2345]

thanks for the welcome.what are you refering to exactly? I did buy the whole harness...in fact i got the whole clip. i do not have any missing plugs reason why i had to check continuity between wires is simply b/c FSM was wrong and that was the only way to make sure they are what htey are suppose to be.

[JSpecBnr32]

he means they pay to get a harness made so its plug and play

[amp2345]

There is no point of paying someone 400$ for somethign that takes two hours to do IF diagrams are correct. If you're(not you you jsut you in general) the kind of person that is lazy,lacks ability, time , knowledge or simply does not want to deal with it or can afford ~2 weeks down time thats a great way . But how do you know whoever is modifying your harness did it right? Evrybody makes mistakes just because they do it constantly only increases that chance. If they did make a mistake it will be you who will have to figure out what that mistake is and if you are totaly oblivious to wtf was done to the harness you will spend just as much time if not more then doing it yourself.Thats my 1 cent out of the 2, i got more but i got shit to do.

Bottom line is i know that as long as all the schematics are correct i wired it up right, but apparently something isn't and thats why i am asking people here is it is a common problem. Its not my intention to make an asshole out of myself but anybody stating "o you shoudl have done this or that" is waste of their and my time....how does that help anyone?

[sbanzer123]

thats why im saying screw it and sending my harness out to be professionally done. my cars off the road until atleast april so i can afford the wait. i have so much other stuff goin on with my car, i just want to get it back so i can hook everything up and it will all work turn key. the cost isnt really an issue compared to the convience.

[amp2345]

thats why im saying screw it and sending my harness out to be professionally done. my cars off the road until atleast april so i can afford the wait. i have so much other stuff goin on with my car, i just want to get it back so i can hook everything up and it will all work turn key. the cost isnt really an issue compared to the convience.
yeah i see where youre comming from and i wasnt arguing that.i mentioned it as one of the scenarios why somone would want to do that. Convinience is #1 but i cant allow myself not to know what was done to it and how it works i am not liek that. and frankly its not important to this topic i just felt like saying all that crap.

[Slidin240Wayz]

I would check the wire you connected it to.

Example; when you install an S13 SR in a S14 kouki, you have to connect the fuel to a purple and black wire and it was. We also checked continuity and it was there. I told my boy to go over the connections for 3 hours. Finally, he found out he connected it to the incorrect purple and black wire. Once he connected it to the correct one, the car was able to fire up.


Carlos

[koukimonster139]

send it out. its worth it.

[amp2345]

Slidin240Wayz, thanks for the input i will double check make sure i didnt make a mistake and did wrong wire!



send it out. its worth it.

Yet another useful idea. Thank you!:bash:
Car runs in fact it hauls ass sending it out at this point is plain retarded. i will figure it out eventualy i was just hoping you guys could help me out.

[projectRDM]

Problem is you're on the wrong wire. Tach signal to the ECU on the engine harness side is Y/R, not Y/B.

[sbanzer123]

go to the heavy throttle website and talk to yuri. thats who im sending mine out to. he has a wiring repair service it says if you tryed and it doesnt work he will fix it for 100 bucks. worth it!

[Slidin240Wayz]

Make sure you ask yuri about the ignition relay. I was told he bypasses it and it can create a problem with a standalone ecu.

Carlos

[amp2345]

Problem is you're on the wrong wire. Tach signal to the ECU on the engine harness side is Y/R, not Y/B.
It just so happens that All the SR FSMs are missing page EL 115/114 which is the diagram for the cluster/tach. So all i have to go by is whats on page EL 113 which says taht Tach gets signal from terminal 7 at ECM. I dont know what collor that wire is suppose to be but pin 7 on the ECM is L/B(blue black stripe).

I've tripple checked to make sure i am actualy looking at Pin7 and dotn have it all upside down and stuff.

I apreciate the info on wire collor but i dont kow waht pin it really is.

what do you think man?

PS i THINK FSM i am using is teh Australian FSM....not sure tho. its one on camel-towing.com

[aNskY]

r240na is correct, tach signal wire is Y/R not y/b

pin 7 is for CONSULT, tach signal should be pin 3, but disregard that; its the only 18 gauge y/r wire.

[amp2345]

r240na is correct, tach signal wire is Y/R not y/b

pin 7 is for CONSULT, tach signal should be pin 3, but disregard that; its the only 18 gauge y/r wire.
i said pin 7 at ECM and i never said y/b ... said L/B but i was wrong either way so it doesnt matter.

I will try pin 3 at ECM tomorrow since its easyer to get to. Thanks for the help.

What FSM are you using? one i have clearly states that tach signal is pin 7 at ECM. and where did you get it.

[johngriff]

do you slaughter the cow everytime you need a cheeseburger.

McDonnalds could be called a specialist of the cheeseburger process.

A wiring specialist could solve alot of issues for you.

[Lith]

I found a site where the guy outlines how to install an APEXI AVC-R into his S14. The thing is, he's from UK, so the S14 SR20DET engine is actually stock.
Since the AVC-R is a nice little boost controller from APEXI, it uses the RPM signal as well. So you need to wire that in as well.

Here's the link: http://www.jull.co.uk/mods/avcr.html
if you scroll all the way down to the bottom of that page, he points out that there 2 difference S14 SR ECU's out there. Check which one you have and you'll find the RPM signal. Obviously the total number of pins on each ECU differs. The top ECU lists pin #7 as the RPM signal. But the bottom ECU (S14a ECU) is quite a bit different.

I'm not sure if that's gonna be helpful or not, but it's worth a try :)

edit: I found another s14a SR ecu pinout (which happens to be the 97-98 Silvia ECU, or 93-98 European SR ECU and the 99-02 S15 ECU)
http://www.plxdevices.com/ECUDatabase/Nissan/Nissan_Silvia_S14SR20DET_97_98_SR20DETEuro_93_98_S 15SR20DET_99_02.pdf

[reactor]

Early model S14 has the RPM signal at Pin 7

Late model S14 has the RPM signal at Pin 2

[240sx_sr20det]

what about a 90 s13?

[reactor]

^ For a S13 it is Pin 3. Its a yellow/red stripe wire.

Just a note that Pin #'s are not started from the end of the plug, they are the number Nissan assigned to the plugs pins.