jojothemonkey

That makes sense to have the coil positive and negative all in the same circuit. But I still do not understand why there should be two separate sources of 12v going to the distributor. I see that by connecting the resistor it should drop the voltage down to around 5v. But where is the main 12v wire suppose to connect to. This is an 83 distributor. This is frustrating as this is pretty much the last thing to figure out before I can attempt to start the car and before I move to Houston next week and have no where to work on the car.

I have Megasquirt II PCB 3, with the direct coil drive installed. I am also using a relay board. Distributor with the three wires Black is ground - goes to frame or engine White is trigger - goes to Tach on the relay board Red is 12v - goes to ??? Coil Negative terminal - S5 on relay board Positive - Depends on what relay board diagram I have looked at ties in with the fuel pump power supply or ignition switch Now if I look at this diagram Terminal #5 shows the positive side of the coil being connected to the fuel pump. Why not my ignition switch? Terminal 15 shows the white wire on the distributor being tied in with a switch 12v. WHY? As stated above the red wire on the distributor is 12v then why does the Tach wire require 12v also? The way I see the distributor wires is ground, power, and signal. Then if I look at this diagram It shows the O2 sensor is tied into the fuel pump. The positive side of the coil goes directly to a switched 12v source. This post may not make a lot of sense. But I am confused as heck as to why things are wired like they are. One more thing, what size fuses should be used for the fuel injectors, 5amp or 7.5amp?

I believe you are looking for something like this. The block and oil sending unit is 1/8 BSPT, British standard pipe thread. This fitting has a male BSPT that goes into the block and a female BSPT for the sending unit. In the middle it has two 1/8 NPT. In this thread there are a couple of sites listed. The first site has turbo oil line kits. I bought mine from stealthmodeperformance which is the same product from tunertoyz just a couple of dollars cheaper. http://forums.hybridz.org/showthread.php?t=120784&highlight=oil+feed+line

I just pick one up at autozone along with my new coolant sensor. Thanks for the input guys.

That is perfect! I just checked it out on my old harness and plugs in no problem, now I just need to find one that is not busted up. Thanks!!

Does anyone have a part number for the electrical connection that goes to this coolant sensor? For some reason I cant find the female plug on the old wiring harness or any part store web sites.

Nope. But I don't think it will matter. I am just going to connect cable and lights and see what happens.

I guess it will either be grounding point or a connection somewhere. I really don't know what to look for as all of this is new to me. Here is a link to service manual. You can use this to try and trace out the electrical connections. http://carfiche.com/fiche009/s30/

Odds are you have and electrical problem. Pulling the lever towards you should activate high beams not turn your lights off. You may want to check your fuses and mabey even some of the connections on the turn switch. Look for a white wire with a yellow stripe that will be for high beams, at least thats what is on mine.

I'm not sure if it did originally. On the harness I am installing it has a separate wire for high beam indicators.

I knew it was mechanical but didn't really think about that until you pointed it out. Mabey it was just those wires throwing me off. Hmm mabey the wires are something for the ecu?

Ok, so like the genius that I am I pulled the all the electrical out and didn't make any notes. I am currently installing a 22 circuit EZ2Wire harness. I have the rest of the gauges figured out, except the tach and speedo. Also these gauges could be 280z (not sure if there is any difference between 260z and 280z gauges) because one of the previous owners swapped in an L28 and 280z dash along with a major hack job on the electrical. On the Tach there are three posts. The larger one I figure is the tach signal and the two smaller ones are gauge power and gauge ground On the speedo I am sure that the red wire is gauge power. However there is a little circuit board with three wires one green, green red, and red that does not go into gauge itself but is just screwed on. I dont know what that is. I have tried to trace things out on the electrical diagrams that I have but I still cant figure out whats what.

So close to being done... er well getting the engine running. Last few things to do. Finish up the exhaust and all of the wiring and all the little details that i'm sure that i have forgotten about. Installed some Corbeau seats that I got from Craigslist. Since they were used I swap the seats around passenger to driver side and vice versa Moved the seats inward so that the side bolster doesnt interfere with the door closing I bought a T3 wastegate adapter from ebay and then in an unrelated search here found that it wasnt plug and play. So I said the heck with it and welded it on to my manifold which already had a broken stud that I tried to fix. Not to sure how well the welding will hold up but it will work for now and I have another for back up that I literally dug out of the ground at a junk yard. I was going to redo the setup but decided against it as I would had to have remake my down pipe and a couple of other things. Made the downpipe from a 4" v flange, 4" 45 degree pipe and a 4" to 3" transition Broke my vise bending the @#*! pedal so I could install a throttle cable. What a pain in my @$$ it took about two hours of bending just to get it right. Eh what can ya do? All better Well hopefully I will have it running by next week.

You should be fine with the gas tank in the car. If you really worried about it you can always drain it. There should be a plug on the underside. And no you dont have to worry about being shocked while welding. Make sure you measure and trial fit as many times as you can. Also do as much practice welds as you can. Good luck!

Thanks for the input. It dawned on me a few hours after I had posted a reply to do a search on what others have done for this and Proxlamus has a thread going on with a bunch of good info in it ( http://forums.hybridz.org/showthread.php?t=121590 ). What I have found is that one of three things happen. People put an air filter on it, run a catch can or do some sort of pcv setup. I think just for now I will put an air filter on it and continue to focus on getting the car running.