NewZed

I would put it all back together and drive it.

Is it an automatic? The circled "A" is the circuit for that. There's an inhibitor relay.

Sounds like your timing is off, a light would show that, or you have your plug wires to the wrong cylinders, or you have some crossfire between wires. You still haven't really told anything about the engine management. You can't run EDIS using the stock 280Z EFI system. Actually, maybe you could but you would be stuck in "limp home mode", at 10 degrees. Assuming that you set it up right. Again, a timing light would show it. Good luck with your mystery project.

Sometimes people discover that the rear caliper bleed screw hole is not actually the highest point when installed after these conversions, because they're not designed for Z cars. It's close but still has a spot for an air bubble. They have to unbolt the caliper and rotate it so that the channel to the bleed port really is the highest point. They bleed the brakes with the caliper loose, then rotate it back and bolt it down when they're done. Be the bubble.

I am aware, just wasn't sure you were. 153624 >> 1-6, 5-2, 3-4 looks right for pairing. Have you checked timing with a light? You haven't really confirmed what you know besides the parts that you bolted on. "I bolted these parts on, it doesn't work." A common cause for backfiring through the carbs (some people call it front-firing, since backfire usually means at the exhaust pipe) is a bad cam lobe. Your problem might be mechanical not electrical. Have you checked valve lash and cam shaft quality? The short direct answer to your question in the first post is "yes, it's described in two of the threads in the link I provided". Good luck.

What engine management system are you using? EDIS isn't coil on plug, it's coil packs, with one coil firing two cylinders. Not really clear what you're describing. Coil on plug is typically one power transistor per coil managed by the EMS, EDIS has it own separate control system. There's a couple of EDIS threads in this topic - https://forums.hybridz.org/forum/93-megasquirt/

The nuts for the cross piece are hard to get to. But removing it will give you more room to work. Buy a bigger wrench if you need to. A pipe wrench will also work. It will chew it up the plug in a different way than just rounding the corners. But, used properly, it will self-tighten as you apply leverage. They only go on one way. Heat the aluminum around the plug, not the plug itself. Aluminum expands more than steel with heat. Use big leverage. Get your wrench set up in the proper place so that you can get a long cheater pipe on the end and will have room to move it. Heat the cover around the plug and apply leverage while it's still hot. Aluminum conducts heat very fast also so the time you take putting away the torch and getting set to apply leverage can let it tighten up again. If you can, using your leg to move the wrench or with a friend, apply the force while you heat the cover. That way you'll use the minimum amount of heat needed to get it to move. Just some tips. Your problem is not uncommon. Getting things setup just right before applying the heat and the force is important. It's all of the halfway attempts beforehand that tear things up.

Sounds more like they were just bad shocks/inserts from the beginning, or they were actually the wrong ones for the car. The oil in the strut tube would have had no effect. It's on the outside of the shock body. It doesn't move at all as the suspension moves. Just a pool of oil, sitting there, doing nothing. KYB makes a good product. Good luck.

It's probably a light ring of rust right next to the piston rings. Take a closeup shot of the bores and a piston top and you'll probably see something. Not much you can do except get it well lubed up for when it breaks free. Get some 30 wt. in there. The penetrant and the diesel won't affect rust, but they will let the rings slide over it, hopefully. Rust never sleeps. I was digging through some old brake parts that I stored brand new in a dry box in a dry garage the other other day. Rusted and ruined.

That would be a good setup. I didn't realize that you already had the 123 Ignition in your first post. That's the way to do it, I think. 123 could expand their market if they made it more of a "high energy" system.

Do you have programmable timing advance?

Actually, "automatic" dwell is designed to be the most powerful. Automatic dwell is actually current control. The module still has to be able to handle the high current though, and 123 seems to specify high resistance coils.

You can run a more powerful ignition module, like the Crane, with the programmable 123 distributor. Programmable high power ignition when you combine them. You could run an external $25 GM HEI module with the 123, I think.

The L28's are definitely worth keeping. They are the easy power bolt-in power upgrade for 240Z's. The L24's are the iffy ones. 4.6, is that going to be a Ford swap?

Actually, I'm not even sure those are 2+2 specs. Dilemma.

You have a 260Z 2+2 with stock springs? That's a good question. The FSM shows that they all have the same spring constant but the left side front spring is shorter than the other three. I don't know why that would be, since the driver is on the left in America. Maybe they are Japan specs. I would look through the FSM and see what you can figure out. Certainly possible to get the short spring in the wrong spot.

It's worth some bucks. Not a lot, but worth keeping. Looks like a 75 or 76, with the non-webbed intake manifold that people like (even though they probably cause more heat soak problems). Somebody would probably drive out there and give you $100 for it. I saw a Tony D post over on zcar.com a short while ago. He hoards, but it's not clear where he actually resides these days. @Tony D

It's only a problem if you use them on the back side. It puts a side force on the rod tip as the suspension moves and fatigues it until it breaks. You can use them on the front and it will reduce toe out when you brake hard, and make the steering firmer. The rubber on the back really only gets used hard when you brake in reverse. Most people use rubber on the back and polyurethane in the front if they want to tighten up the steering, inexpensively

I think that he would need a new companion flange also. The companion flange is where his 3x2 bolt pattern is for the CV axles. He needs a stock companion flange. So, he'll have to remove the wheel side axles and replace the companion flange, with all that that entails. A lot of work for a sway bar.

No real idea on the parts, just the writing and logic. Maybe confirm that the old setup won't work before getting carried away? Unless you really really just want to use the ST bar and T3 parts.

If it happens consistently, after driving, it might be that the shocks are damaged. Are they "old stock"? Also, as I mentioned, some shock instructions ask you to run them through their full travel before installing, to get the air and the oil in the proper places, inside the shock. I can't find anything on the internet but I just installed some KYB's on a truck and that's what they said to do, on the paper instructions that came with them. Maybe your Gabriels have some air pockets. Drive over some speed bumps, maybe, get the oil flowing inside them. My KYB's are firm from the start, even after sitting in the garage for months, so what you're describing does sound wrong. Especially if it's on just on side.

And, this "test" is meaningless. I have KYB's on my car and the car doesn't move if I push on a fender or even stand on the bumper. But it rides just fine. The cars are designed to have firm suspension. You might have had some air in the wrong place in the shocks that needs to be worked out and that's why it moved a few times before firming up. Working the shocks before installing is actually in the instructions of most aftermarket shocks, because they tend to sit sideways during shipping. You should just drive it and see how you like it.

The drawing in the Brake chapter allows you to see the line of force for the mechanical parts, all the way to the MC. You need to get all of the play out of these parts before you start worrying about the hydraulics. You're wasting brake fluid otherwise. You're jumping around from booster to caliper to bleeder to NP valve. Just follow the path from your foot to the MC piston.

What do you mean by "add oil"? With the aftermarket shocks the oil serves no purpose besides hindering rust. The aftermarket shock shaft and shock internals don't even "know" that there is any oil in the strut tube, if that's the oil that you're talking about. Seems like you might be assuming the wrong cause of your problem.

Start at the pedal and figure out how each piece works. You're talking about the booster but nobody uses the booster when they bleed the brakes, it doesn't matter. Nobody has the engine running. You haven't confirmed that your pedal play is correct, as described in the FSM. At this point, by your description, it sounds like the brakes work fine but the pedal throw is too long. That sounds like a simple clevis adjustment at the pedal. Study how the pedal presses on the rod that presses "through" the booster to the MC. Make sure that all of the mechanical play is set correctly. " (the pedal get firm at the bottom and does not go to the floor). The problem is still that I get a lot of travel before much happen. "