xtreme 2

what do you mean exactly? sorry never done this part of the swap before, so I am needing a little help...

got any pics to help?

NismoPick

I have pics at home... but I'm at work right now. Just carefully cut open the Z31 ecu plugs & pull out the wires you need. It's easiest to pull the same wires from the Z31 plugs that will be going in to the 280zxt plugs... like pull pin# 12 from the Z31 plug, because it's the wire you need to insert in the empty #12 slot on the 280zxt plug. That way it's the same color coded wire that's in the Z31 schematics, and is easier to diagnose if you ever have to reference back to it.

xtreme 2

when you say to do this, are you assuming I have a full engine/ecu harness from a Z31? I only have about 6" of wiring from the ECU, which is all I could find...

what would I have to do in this case?

NismoPick

That's all you're supposed to have... you strip the ends of the ecu wire & solder more wire on. Then you can take the wires to their needed location.

You did read the Z31 ecu swap guide didn't you?

wreckedj30

yo nismo that shirt you have on your sig. has a head above it, and it's flipping me off, wtf....i take offense..lol. so will i need my chopper wheel back for the ms. swap..NIsmo.

NismoPick

hehe... yeah, that's an ICP shirt & the smilie fits perfect! And from what I've read, you can't use the stock 280zxt (nor Z31) crank angle sensor with MS...

wreckedj30

damn then what...hmm, this sucks, my car took 3 times to start then when it did i moved it like 40 ft. and let it idle a little. Then shut it off, then turned it back on, it started then died like bogged out. Then after it was dead, it kept kicking like the car was trying to start but didn't...Man nismo you want a free zx. I'm gonna shoot it.

NismoPick

Dude... ok...

Between the time it stopped running & finding that the ecu wire fell out, what changes / mods did you do? Name everything you touched.

wreckedj30

ok, took off the thing under the afm. plugged the connectionit went to, the thing under the afm, i plugged the egr and aac?. and changed the lower radiator hose.

in order
1. lower rad. hose,
stoped running the next day, the #12 pin fell out, reinstalled
2. under the afm crap, removed and plugged hole
3. plugged egr and aac?
and thats it, i'll think harder tho
4. swapped out broken speedo/tach
5. am going to change the power steering pulley right now.

wreckedj30

oh after the car died, i took out the harness, not engine but headlight and all the other crap. I removed all unused wires, including the one that goes to the sensor for the master cyl. the only thing that isn't connected as of now, is the hose that come form the boost sensor, the water temp senso, used inline of the heater. probably a heater sensor. thats about it...oh and the car just started a little bit ago, and i tried steadly reving it up, i got to 2500 and it bogged out and died. Won't start again....

NismoPick

I suggest putting all that back in until you have the problem fixed or narrowed down... It makes it more difficult to diagnose a problem, if you keep taking things out, before fixing the problem.

nismo619

Deal Wreacked J30 i apologize about the delay of your 45 dollars i wanted to make sure the ecu was good and worked right . I took down the ecu to the Nissan Dealership to check it and they said it was " fryed " i tried the ecu in my friend 1984 10th month of 84 300zx turbo automatic and the car didint start i didint want to send u a broken ecu or fryed so i have been looking around trying to find u a new ecu.. eather way i have snet 45 dollars plus another 80 dollars for a used one from " ALL Japanese " Auto wreacking from Amarillo Texas. i get paid on the 15th od decmeber im going down to pick it up and i will be shiping it shortly. i apologize if your angry and i apologize if every one else is mad at me i wouldnt rip any one off period ! And to all the people who bashed me " you know who u are " i only wanted to do the right thing ok ! i wanted to ship him a working ecu... i know how it fills to buy a broken ecu from fellow zdriver members also a bent turbo charger shaft... off that t4 hybried i bought.. anyways j30 wright me please

wreckedj30

yo, what up 619 where you been. And if it was broken you could of just said that and either sent the money back or something. No probs. tho, its been like a month and a half though so that why people have been talking ****...Its cool, just send the money back unless you want to spend all that money on little old me..

xtreme 2

hey, so I am to the ECU wiring stage of the swap, and I am a little confused. Following the diagrams from the ZIP file, it is hard to see where everything goes in, as not all of the plug wires have numbers associated with them.

Is there a color-coded diagram of what wires from the 280zx harness? If there is, and a link could be provided, it would make things a ton easier for me... I have the Z31 harness all properly labeled, but the 280 is another story...

Thanks in advance...

NismoPick

You have the Z31 wiring schematic from the ZIP right? In the top left corner it has a picture of the ecu plugs... using that, and the #'s on the 280zx ecu plugs, you should be able to find the correct wires. You only need to add two wires to the 280zx ecu plugs.... #12 & #34. You only need to add #3 if you are using the Z31 coil & wiring.

All the wires are color coded in the Hybridz writeup.

xtreme 2

oh ok... thanks...

got the two smaller plugs done on the 280, all thats left is the 3-tier plug, but its getting dark so now I have to wait for morning... but just label that one then I can start swapping everything... get everything wired up and then just wait for the 300zx disty to come in and I will be ready to go...

DriftZ83

after reading everything no one said if the Z31 turbo ecu has to be a manual or auto to match or not? does it matter if i have a manual and i use a turbo auto ecu?