bumble zee

Spent days looking for a RB LS coil swap wiring diagram but couldn't find anything other than a "simple Google search will help" comments. Seems all the writeups are old and gone. Well for those who are DIY like myself and don't want to spend over $100 on a LS coil harness, here is a wiring guide. Thanks to ScottyMIZ for all the help

Updated 12-2-13. Edited the OP and linked to the write up instead of confusing people with the write up on the youdamnfool site that was taken down.

Sold my Z today.

Came down with a good case of the flu. Been on the couch for 2 days. I can muster some strength this afternoon and get the pictures.

I can try to get that for you tomorrow

Sorry I haven't been replying to posts and PM's lately. Been really busy. If you want to get a hold of me quicker, email me at zul8er@gmail.com

Mine is a single wire on a double prong too. You have a - prong and a | prong. Mine is on the | prong

it will be in the wring near your FI relay (lower left side of the picture)

Oil pressure on mine is just 2 female bullet connectors, and the o2 sensor is pretty obvious.

30 minutes or less http://http://www.30minutesorless.com/ Filmed in the city I live in, GR

Shifted to soon into 3rd and I couldn't pick up the turbo so I was going to try again, but settled for 2nd.

-Blue with red stripe - is switched power for your fuel pump relay (has 12+ volts when key is on, will have power for 5 seconds if car is not running to prime the fuel system, and will have a constant 12+ volts when car is running.) For a relay to work, you need a constant +, switched +, signal, and ground -. Constant 12+ will obviously come straight from the battery, switched comes from the blue with red stripe wire from the eccs, signal wire in your case is the green wire you have going to the + side of the fuel pump, and the ground for the relay and the fuel pump can goto the body or the - on the battery.

The fuse is on the constant for the relay, and what you do with the negative wire depends on if you have the 300zx eccs and maf conversion. Stock 280zxt the positive is a switched, and on the 300zx the negative is the switched.

I used a fog light relay with an inline fuse.

That is interesting since his coil packs are cracked and silicone is a temp fix so he can drive his car while saving for new coil packs.

My brother has a RB25DET with a series 2 wire harness and has developed a miss when initially getting into boost. After a few misses it runs like a raped ape. I cant hear any ticking under the hood. His boost pressure is sitting at 7 to 8psi. His tach isnt hooked up yet so I dont know the RPM's. He had a mechanic friend look at it and he said the o2 sensor looks to be bad. It shows .02 volts before boost, then after it drops to 0. If he disconnects the o2 he said it runs a little better but still has the miss. It isnt anything intrusive. Nothing like a shutter that I get from time to time in my Turbo 240z.

I got a sump from Summit Racing and put it on my 240z tank

Hey Phil, I have a P90A with solid lifters. You can kinda see the stamping by the coolant hose.

Is there a write up on the GM swap?

We got it figured out, thanks. Found all the coil packs are leaking spark, so that solves are problem of firing then dying.

I never get tired of TonyD. I hope it helps you. Get a question don't hesitate to ask.

I did not know that. That sounds cool. I have a na distributor lying around too. Now if I did the z31 eccs upgrade, will it work on there too?? I take it you don't use the vacuum advance.

That whole drawn diagram is meant for just 82 and 83, not the 81. So don't even refer to it. You said you swapped out to a non turbo distributor, how does that work?? On the turbo FI and ingition, the distributor is controlled by the crank sensor on the crank and the eccs tells it when to fire. So a NA distributor wont work with turbo electronics. If the car doesn't start, make sure the plugs aren't soak with gas, make sure the AFM if working, check timing.

That diagram that you quoted above is for a 83 ignition harness and doesn't pertain to the 81 ignition harness. So you wont have plug 3.

Can you trace the wire back from the ignitor to find plug 3? What year harness and ignition are you swapping in?