Zed Head

$17,000 for the 83 ZX Turbo hooner, whoosh, whoosh. https://bringatrailer.com/listing/1983-datsun-280zx-turbo-12/

Intermittent problems are the hardest to solve. I'd set some things up so that I can get information when the problem happens. A fuel pressure gauge would tell you about fuel supply. Watch your tachometer needle closely when the hesitation happens. Could be a spark problem. The fuel filter thing might be a red herring. And, it's always good to start with a fresh tune-up when a new problem shows up.

I Has it ever worked right? Never really said. The "standard" coil might not be the right coil for the ZX distributor. Or it might just be 50 years old. Are you using the return line on your carb setup, and does it have the restrictor in it? The restrictor actually keeps the fuel pump from over-drawing from the feed side. I just realized this when you said your filter gets drawn down. With the pusher pump at the tank you wouldn't have this problem. But the mechanical pump is pulling and pushing. If there's no restrictor it will be easier to push than to pull. You might be starving your pump. It's still kind of early here so my thinking could be off.

Maybe this one.

I'm the Wiz...I'm the Wiz.. Reserve not met, at $28,250.

Just a comment. This post might be readable on a phone but it's just a huge block of letters on a computer. In case you're wondering about responses. Kind of looks like Ginsberg wrote it. Stream of consciousness stuff...

The temperature controlled timing advance is done by another set of points in the distributor. If you have that system it might be that one set of points needs adjustment. Have you been under the distributor cap recently?

What do you mean by "digital" signal? You'll need some sort of converter to use a thermistor or thermocouple reading. That might determine the type of sensor you need which could determine where you put it.

What changed? You said it ran right for 20 minutes. Your fuel pressure reading is too high. What happens to it if you remove the vacuum hose to the FPR?

Silver 240Z's are popping up everywhere. Weird. Looks good. One thing that might fit some of your symptoms is a sticking vacuum advance breaker plate, if you have vacuum advance connected. You'd have high advance at idle and low throttle, then it should retard as you open throttle. The detonation might be from high advance because the plate is sticking. Pull the cap and see if the breaker plate moves freely. Mark Maras's suggestion will tell you if it's a fuel/air ratio problem. You should try what he suggested. Pull the choke.

This one? Or lonetreesteve's, #534 above. It's a Z-Orama. https://bringatrailer.com/listing/1971-datsun-240z-164/

Originality and that citrus color. It even had a bad dash and a header.

The Lemon Green 73 is up today. Sold for $40,140. https://bringatrailer.com/listing/1973-datsun-240z-139/

The ZX 5 speed does have the ratios closer together, 1st to 4th. So, should allow a person to stay in a narrower RPM range, for sporty driving. I wanted a 5 speed because highway speeds were buzzy and noisy when I first got my car back up and running. I thought that 5th gear would drop the RPM and make things smoother. But after I got the 5 speed in I also put a better engine in with properly balanced injectors and other parts that was super smooth all the way up to the high end. I ended up using 5th gear not much after that, the old engine had been just a noisy buzzy beast. But out on the 70 mph freeways the new 5th gear was nice even with the new smooth engine. I think the choice depends on how and where you drive. 4 speed 240Z's are collector cars, for shows and investment.

Maybe he builds them to order and he got lazy on his picture taking. His BMW headers seem to be fully welded. Doesn't seem pleasant to deal with, whatever is going on. Just surprising that people who should know what's important don't show what's important. https://www.ebay.co.uk/itm/Top-End-BMW-2002-Shorty-E10-Exhaust-Header/164146687745?hash=item2637e7af01:g:xLsAAOSwFnFV8bQ3

https://www.ebay.co.uk/itm/1-5-Primary-Datsun-Z-Header-All-Square-Port-240Z-260Z-280Z-280ZX-/313386185058?_trksid=p2349624.m46890.l49292 https://www.ebay.co.uk/sch/topend/m.html?_nkw=&_armrs=1&_ipg=&_from=

I like the portable dance floor on the back. Or maybe it's a picnic table. Multi-purpose, you could do your auto repair work back there. Maybe that's it.

Looks like a nice pump. Everything is "stock", and it comes with fittings, straps and insulation. 4.5 psi at 30 gph. https://www.summitracing.com/parts/atx-e8016s

Stealthy 78 survivor Arizona car. Seems like it might get a nice number. https://bringatrailer.com/listing/1978-datsun-280z-85/

Yes, the goal is to know what pressure the injectors see.

They hide the actual ports in their pictures. Probably the same 4 round, 2 square header. There's probably an offshore company making thousands of these for cheap, and people are just reselling them.

(Sold for $23,500 - no driving video, low rider, runs rich. Nice paint though, and a 5 speed) The red 5 speed 77 is already over the orange automatic 77 selling price. It's going to get good money. No driving video, and the seller says it "runs rich", stock 77 L28, plus it's so low, with wide tires, that it's probably barely drivable over any sort of bumpy road. BAT is the place to sell your Z, for sure. https://bringatrailer.com/listing/1977-datsun-280z-53/

You could sell that can of oil to that American Picker guy for 50 bucks. Pretty sure that coins have three sides.

$26,750. That was a weird auction.