NewZed

You'd probably be one of two. BRAAP used to be a lot more active on the site. Don't know what he's doing now. You never know, he might respond to a message. http://forums.hybridz.org/topic/46198-a-mopared-datsun/

Is it a new engine? You might just be burning some oil, and the rings are not seated equally between all cylinders. I think he's talking about the fact that one looks lean, two look rich, and three look close to right. The heat range looks pretty good by the electrodes but they're covered with deposits of incomplete combustion, like if oil was being burned.

Does not matter a bit. Alternators are simple electrical components that can be swapped on to any engine, as long as they're wired correctly.

Looks like you have to disassemble the transmission to get the O.D. gear off the shaft. 1982 MT chapter.. And it's 80 - 83, not 79 - 83. 79 for sure and maybe early 80 are the "wide" ratio transmissions.

Give an update when you get it installed. Many people convert a 90 amp Maxima alternator but you have to change the pulley, and reiwre the plug. An extra ten amps with just a plug rewire seems worthwhile and simple. It's been described before but doesn't seem that common.

Looks a lot like a 300ZX alternator. 70 amps instead of 60. http://www.rockauto.com/en/catalog/nissan,1986,300zx,3.0l+v6,1209563,electrical,alternator+/+generator,2412 Take it to a parts store and make sure it's bad. Then see if it matches a 1986 300ZX. You might have to call ahead so that they can get one in for you to look at.

Looks like somebody converted your externally regulated system to an internal system, with an alternator more modern than a 280ZX's. Maybe a Maxima or a GM alternator. Should be easy to switch the plug for a T plug, just figure out which wire is S and which is L. Might be easier overall though, to just replace the alternator with the same model that's in there now. But, if the car is new to you and the alternator has never worked, you might have wiring problems. Give a rundown on the car and why your'e replacing the alternator.

Saw your post over on zcar.com and it's different. So that's going to cause you problems if things seem different in that short amount of time. One thing that can cause a "shorting out" electrical noise is the fuel pump contact switch in the AFM. As it starts to open due to low air flow the fuel pump relay will start chattering. But it's under the steering wheel in the cabin. If the injectors don't have power and only click once when you reconnect them that would mean that they're open and dumping fuel, if the pump is on. So that doesn't make sense. You've got some things that aren't factory stock so that adds to the difficulty. The fuel pump should not run when you turn the key On, and the digital tach you mentioned over on zcar could be part of the problem too.

Nissan built new parts and had a Service Bulletin to fix a problem like that, on the first 240Z's. Can you get the picture any smaller?

Find the letters on the hubs first. If both sides have the same letter, then swapping the spacers wouldn't matter. In post #6 where i said give it a beating, I meant a few hard corners and miles, to warm things up and maybe reseat things. The way they designed that system the nut and washer on the axle are used as the press for the bearing race. So if things were tight initially on the races and their seats, even the high torque might not get them fully seated.

You might just go give it a good beating and retorque the nuts. Specially if the castings have the same letter.

The spacer matches the hub casting. So it could be different side-to-side if the hub castings are different. There's a letter stamped in to the casting that should match the letter on the spacer.. It's all described in detail in the Rear Axle chapter.

Did you measure the spacer and compare to the table in the FSM? And did you torque the nut to spec.? I've read that the spacers can get a bit crushed after miles of use. Nissan calls it a "distance piece" and it's matched to the hub casting.

It's an anvil that Nissan provided with every car. It bolts to the bottom of the diff mount crossmember. Actually, it's a vibration damper. Many people remove them and never notice a difference. It is a handy weight and/or anvil to have in the shop though. Nissan doesn't mention it much in the FSM. I've only found one instance.

madkaw's talking about the shape of the curve, less so the max number. Still no numbers. not even measured times, so it's all sensation. The same power curve with a bump at the top might feel less torquey than an engine with less max power. I remember getting beat by my friend on his boring old XL125, against my peaky two stroke 125. He had power everywhere, I had to wait on mine. Mine felt faster, but his was faster Plus he outweighed my by 20 lbs. Very frustrating.

At least he kept the scraps so he can undo it later. Part 2. The music isn't bad.

Swap your wheels front to back. See if there's a change. I had a broken belt in a tire that caused a vibration. Autocross is hard on tires. And rims if you hit something.

You changed at least two variables at the same time. Going back to #2 will move the power up the RPM curve. And you're tuning by ear and butt. You've lost the honk of the triples so it will sound less powerful, of course. Without numbers though, you're really just guessing, and any suggestions are mostly bench-racing. Unless they have numbers to compare. No offense intended to the prior suggesters but the comments seem to be about expectations, with no measurements. Also noticed this - "WOT AFR is very consistent ( beauty of MS).", and remembered that you want to be rich when you're around the torquey part of the power band. You didn't give the numbers though. So maybe there are still some tuning gains to be gained. How do your ignition timing advance curves compare? Another variable.

Check any flat area where a mouse (not likely rats) can sit and pee and poop. They pee wherever they go so the pathways to the flat places are important also. I found about 1/4 inch of poop on top of the glove box in a parts car bought, and a nest in the blower for the AC system. Your main problem though is that they pee everywhere. So anywhere they went is everywhere they peed.

The OBX is essentially a knock-off isn't it? Maybe you got a counterfeit knock-off.

Good luck.

Just realized that you said reliable, not stronger. The stock 1975 coil's primary circuit resistance is apparently 0.45 to .055. So, just thatching that range would be the way to go to find a replacement. But it won't be more reliable, unless your old one is failing.

You edited the original post so it's not clear that you even asked a question. But here's an answer to your edited post. #1. My coil is a GM HEI coil. It has a primary circuit resistance of about 0.5 ohms (edit - changed from 0.8. Forgot about meter leads.). My ignition system is not the factory system. #2. Your first question is actually two questions in one so can not be answered. Plus you haven't given enough detail about the rest of the system. You said that you're getting "ignition components". Plural. But you only mentioned one coil. What are the other parts you're getting? Sorry. It's just not clear what you're trying to do, or planning to do. The 1975 system is an electronic ignition system but it's low power. Swapping to a different coil might get a stronger spark but will probably cause your ignition module to fail due to the higher current. The systems are old and failure prone, after all of these years, even in stock form. If you're planning a stronger ignition system there are many different ways you can go. Swapping the coil to a Pertronix coil isn't the way to do it.

Try starting fluid and see if it will start and run for a few seconds. Measure fuel pressure before pulling injectors. Fuel pumps can run in reverse, they're DC. Confirm fuel pressure, don't assume. Looks like you might have some good info from the previous time it started but you went all weird with the Star Wars comment. How long ago, what did you change between when it actually started, and now?

If you don't have the control relays, you'll need to come up with your own system. "M" is the fuel pump.