Zed Head

Things might have changed since those pictures were taken, looking at the old 2008 thread. I didn't realize that they were so old, and that this conversation has taken place before. I read through it but didn't see anything about four trees falling on it. That would change the situation.

How can you tell so much from the pictures? I don't see any major damage. The driver's side floor pan is not rusted through, The only visible dents are the one on the front of the hood. I don't see any major rust-through. Engine and transmission still in it and hooked up. Suspension components ans wheels appear to be intact. Looks like it is missing some interior and exterior parts, but has all of the glass. Too bad it's so far away, the leaves and moss might be hiding a good project. It seems like #299 would be worth the effort. I'm new to the Z game though so maybe not.

I have mentioned this before but I had the same issue on a 78 parts car and just sprayed the dimmer switch at the base of the turn signal stalk full of Deoxit DN5, without removing it. It feels like cheating but it worked and it is still working. Also had the same problem with my current 76 car. I took the stalk and switch off, looked at what it would take to disassemble it, plus not knowing exactly what was inside, and decided to hose it with Deoxit first to see if that's where the problem was. It worked and I never did take it apart. It still works great. Both cars had sat for while, the 76 an unknown amount, and the 78 ten years, without being used.

My battery terminals got dirty and my car did the same thing when starting. Voltmeter dropped to zero, then went back up when I let go of the key. It's typically the terminal connections or a bad battery. I cleaned the terminals and it's back to normal.

Examine the fusible links first. Didn't you say that they are in the car? If you're lucky it may be a fusible link that was melting, like it's supposed to, not your harness wires. The insulation on the links doesn't melt completely, just the wire inside, so you'll need to take a good look at them. I don't know if they smoke when they go or not. If you find a bad link, figure out what wires it feeds and follow those out to find the short. If all of your links are good, expose the ignition switch and wires on the steering column. If you had smoke, you should have bubbled, melted looking insulation on a wire or two. Look at the wires by the fuse box and fusible links. Edit - I was writing as Geezer was posting. I think we're on the same page though. You need to find the circuit that is shorted before you start tearing things apart. Disconnect your battery until you find the melted insulation. Don't use the smoke to find the short. More smoke just means more damage.

If you have wires smoking with the ignition on, it looks like you already have too many grounds. Find the "extra" ground (the short) and the proper ones might work correctly. You may have already created new shorts from wires melting together. It might be too late.

Looking back over this, these two statements logically suggest that the problem is in the head, if work was only done on the head. Valve seals installed wrong maybe? If it didn't blow smoke before and you only worked on the head and it blows smoke now, the head would be the first place to look.

Did it smoke before you rebuilt the head? If not, there would really be no reason for the rings to suddenly go bad. And you said it seems to be "gas rich" but then you focus on rings. It seems like a lot of work to replace the rings, only to find out you were actually running rich. If you have carbs it should be relatively easy to lean it out and see if things improve before you disassemble the engine. Just trying to help reason things out...

The "ignition power jumper wire" might actually be one of the fusible links. The fusible link for the 280Z looks like a piece of wire with a female spade connector on each end. They are designed to melt (fuse) before the rest of your wiring does. I'm not sure what the ZX links look like but they perform the same way. Sounds like yours did what it was supposed to do. And a condenser (capacitor) would only smoke it if it was shorted. But the only condenser I can think of is on the alternator housing and would have fried when you connected the battery if it was shorted, not when you hit Start. Are you sure that it is a condenser? Where is it located? What does it look like? You will need to find the short and get a new fusible link before you go further. Don't replace the link with regular wire, you'll burn some of your wiring harness.

32 is low for the fuel pressure, unless you were testing while the engine was running and the vacuum line to the FPR was hooked up. It should run about 36 psi without the engine running (just the fuel pump powered), or with the engine running and FPR vacuum hose disconnected. You could have an FPR problem or a fuel pump problem. Of course, this might not be related to your stalling issue at all.

Here's another earlier model - http://portland.craigslist.org/wsc/cto/1919054177.html If I am wasting people's time reposting Craig's List, let me know.

Someone here might be interested. From CL 2 days ago - http://portland.craigslist.org/nco/pts/1921551565.html The dash alone might be worth the money...?

I think that the nose of the diff tends to drop on deceleration using the engine compression. I have read reports elsewhere of the rear driveshaft flange rubbing on the rear sway bar. That might be worth a look, regarding the Gatling gun noise, if you are running just the RT style mount and have removed the stock one. I have played around with the moustache bar stock mounts to get rid of "clunking" using stacks of rubber and metal washers and found that the tighter it gets the more gear noise you get. That is noise transmitted up through the body, the stock mounts are still isolating the sideways vibration. So rubber insulators might be worth a look but you will still have the vibration path sideways, with the hard urethane mounts, from the moustache bar through to the metal sleeve which contacts the car body (as ZODB said above). I'm interested in what you find, I have held off installing the urethane mounts due to the gear noise issue.

I went through the slave cylinder replacement, then both slave and master cylinder replacement scenario recently myself. Then the clutch started acting up again, I thought it was one more bad slave cylinder. But after rechecking the cylinders for leaks and rebleeding the system, I eventually found that the lock nut had come loose on the shaft from the pedal to the master cylinder, allowing the rod to work itself shorter. One more thing to check. By the way, it is possible to turn that rod without removing anything. Just use patience, flexibility, the right set of pliers, and one tiny turn at a time.

On a 280, the half-shaft mating flanges have a fairly tight fit centering section that can get stuck. It is designed to center the flanges. Look at the other end of the half-shaft, it's essentially the same fit on the wheel side. You can tap it loose with a hammer or carefully wedge a screwdriver or chisel in at the interface while rotating the shaft. If you have already knocked out the four bolts, a couple of decent taps with a hammer while rotating the shaft should break it loose. I'm guessing the 260 is similar.

A quick look at the FSM indicates the the 74 260Z came with a 3 speed automatic. Although, I am new to Z world and could be wrong. I believe that most older cars came with 3 speeds. But I did have a 1963 Pontiac Bonneville, in 1980, with a 4 speed automatic and a 389. It hauled a@@ for a big car.

Many people believe (from what I've read on the various forums) that the stock factory u-joints are better than any aftermarket u-joints, if they are not obviously worn-out. Aftermarket u-joints are not as tight, brand-new, as the factory u-joints, in my experience. If the old joints are not dry, you can install some zerk fittings if they're not there already, regrease them and just keep using them. You'll probably be better off. Also, why would the half-shafts be involved in keeping your tires from leaving the ground when jacking up the rear-end? Don't the rear wheels hang from the struts at full extension?

When I had my alternator fixed (I was working big hours at the time so didn't do it myself, plus there is a lot of stuff under a Pathfinder hood) the Nissan service manager told me that the newer alternators could be damaged if you jumped a car with your engine running. The spikes through the jumper cables going from a dead battery to generating voltage when the other car started or something like that. I had just given someone a jump with my engine running a few weeks before so maybe there's something to it. Just a thought on why your new one may have gone bad.

Those might be the signs of a bad alternator. I had pulsing dim lights on my 95 Pathfinder when its alternator went bad.

The wires don't cross inside the original fixture that was used for the original fusible links. If you're not comfortable with rewiring you should just stick with the fusible links. They work well if the connections are kept clean as sblake01 said, in your other thread. Make sure you have the right ones in the right places, clean the connections and crimp them a little to tighten them up if necessary, get a cover for them to keep dirt and water off and you're good to go. If you rewire and make a mistake you could fry some wires and your car will be sitting for months.

If you have an ohm-meter or a test light you could test continuity from the "power out" wire from the 80 amp circuit to each wire end. The wire ends that show continuity should be the "power in" wires to the ignition and other loads, since they are fed from the main circuit. The left over ends are power out, to those loads. Hope that makes sense. If you get a test light or ohm-meter and start poking around you will probably figure out what is connected to what, and where to put your fuses.

Zedyone already covered it...

From inside the wheel well! Crazy! Easier with the wheel removed.

Use Part Search on the upper right corner of this page. http://www.thezstore.com/store/merchant.mvc? "alternator adapter"

If you posted some pictures some one might be able to help you out. A full length shot of the passenger (right) side of the transmission should do it.