Alternator wiring??

A forum for owners of S30 and S130 Datsun Z's... 240Z, 260Z, 280Z and 280ZX!
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S130Z
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Car: 1983 datsun 280zx turbo 2+2 1983 Datsun 280ZX-T*sold

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So got everything in just need to figure out where all the damn wires connect in the back of the alternator on the L28ET, I will put up pictures tomorrow of the wires, pretty sure they are just ground wires, but didn't want to hook something up wrong and short something out.


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Infinitiguy19
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You might want to take a gander at the service manual: http://www.nicoclub.com/FSM/. :)

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S130Z
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I went through that, it helped a little bit, probably help more if i understood all the wiring diagrams lmao

I am just going to wait until I can get over to my friends and take some pictures his since he has the same car.

Thanks for the link though, I forgot we can get the fsm off here! :bigthumb:

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evildky
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the white wire with the red stripe goes to the power out lug, the plug is self explanitry and the ground wire bolts to the chassis of the alternator

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S130Z
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Thanks, Yeah the plug is self explanatory, the by white wire with red stripe i'm going to assume that the yellow with the red is the same one but other than that I got them all correctly except for the black ground wire which I found is bolted to the aux. fan place holder or whatever you want to call it.

thanks for the help though, I can't wait to get to drive the Z again!

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evildky
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just trace the wires, one fo the large diamter wires goes to a ground the other goes to the fuse block, actually you can just ohm them to ground and the one that conducts to ground....is the ground

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S130Z
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Thanks I got it all figured out, now just need to do some trouble shooting and right now it's not looking too good...

The Z turns but doesnt start so I checked got fuel got spark checked compression and it's horrible!!

My guess is the piston rings weren't properly installed and all the notches in the rings were lined up. :facepalm:

So I may have to tear it all apart again, was thinking it could be timing as well but how would you be able to do timing since its a concealed system? turning the distributor did nothing...

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evildky
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who built the engine? were the tolerances within spec? ring gap alignment shouldn't cause a measurable loss fo compression unless the gap is way way huge

who timed the cam? incorrect cam timing can cause all kinds fo wacky compression loss, turning the distributor adjusts ignition timing, cam timing is adjusted by re setting the timing chain if you don't knwo what you are doing wiht this it's best to fid womeone who does, if you knwo what you are doing it's simple, but you have to know what you are doing on an L6

z31owner
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he never checks specs just throws it in and hopes it works out. lol jk Riggs

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S130Z
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Pretty much me and my dad rebuilt it. only Internal stuff that was replaced were the pistons rings and pins. (all OEM parts)

But yeah for the timing chain all I did was line up the marks on the chains with the marks on the sprockets as it shows in the Haynes manual didn't know what else I had to do, This is my first build and my dads foreign car he's ever worked on, he never worked much with chains usually had belts so I just went with what the Haynes book said on lining up the marks.

SKITTLE
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First off make sure your initall timing is correct. Also dont use Haynes or chilton manuals. Check out http://www.xenons130.com/reference and download the FSM (factory service manual). Where are you located?

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evildky
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did you get the cam pulley lined up correctly with the notch on the back of the gear and the notch on the cam tower?

with the crank at tdc the #1 exhaust lobe should be pointed up at a 45 degree angle towards the drivers side, the rotor button should be pointed approximately at the #1 plug wire terminal and rememebr that the plug wires go on the cap in firing order (1 5 3 6 2 4) counterclockwise from #1

SKITTLE
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Ducky what handle do you use on zcar?

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evildky
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"ducky" lol the staff at grm started calling me that years ago

I havn't postedon Zcar since well before they upgraded their sofware years ago, and they are still so disorganized I just kinda stay away, lots fo good info but just not user friendly

my nic is evildky in just about every forum I am a member I just don't frequent most of them, being a mod here I tend to spend a lot of time here

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S130Z
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Pretty sure I did....Not line up the pulley lol damn haynes didn't give me anything on that!
I downloaded the fsm but it looked like poo on my computer all the print was chopped up.

As for my compression is it possible the rings are improperly aligned causing the compression to be outta whack? I found this looking for a answer and it says it will cause loss or no compression in all cylinders if rings and cylinders are worn, but they are brand new.

http://www.aa1car.com/library/compression.htm

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evildky
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aligned pistone rings gaps won't cause a significant reduction in compression readings, you gotta remember that gap is tiny

sounds liek you got your cam out of time wiht your crank, on the back of the cam gear there si a tiny little notch that lines up wiht the nothc on the cam tower, actually there are 3 nothes that alight for the different positions, on the forn of the cam gear there are the numbers 1,2 and 3 on the outside teethe as well as on the inside on the index holes, you should be sueing the #1 makrs, the extra numbers are to allow for chain stretch over the years and you ahve a new chain

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S130Z
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So right now got it all wired up got timing done checked the compression its good checked fuel and spark got both, but now when i turn over it goes good for a minute then goes really weak. got new cables and had the starter tested. Any other ideas?

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evildky
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so you have spark and verified it at the plug right? and you have fuel verified both pressure and injector signal? cts good? how do the plugs look after cranking? if they are wet you either have no spark, or overfueling due to cts, afm or some other issue, and you have the spark plugs on the cap in the correct firing order counterclockwise fomr #1 and you got the distributor in time wiht the crank correctly? and on compression stroke?

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S130Z
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Yeah got spark at the plug. The plugs smell like fuel but aren't moist, I have a new pump i'm going to throw in just because the fp is pretty beat up. what's cts? (still learning lol). I lined up everything for timing but compression is still not reading what the book says so I am going to go through it once more. Just going to wait for that front cover since the corner of my broke.


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