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Everything posted by NewZed

  1. That is a common failure point. The contacts inside the switch get pitted. Sometimes the switch gets so hot that the solder joint on the top breaks. Be careful with those wires, the joints are probably fragile from the many heat cycles. Typically, the contacts inside get pitted and/or the wires break off of the top. You can take it apart and clean it up and probably get it to work again. If you do get it working then relays will take the high current load off of the switch. You need that switch to work, even to use relays. Bend those four little tabs back and the
  2. The EFI/fuel pump relay bypasses the AFM switch, for starting. So what you saw was normal. Disconnecting the starter solenoid wire and turning the key to Start is how Nissan says to test the fuel pump operation. Use it when you check the pressure.
  3. 2.5 bar. 36.3 psi. Don't overlook something simple like a sticking or leaking injector. Or even bad fuel. If you don't drive it much the fuel in the tank is probably old.
  4. You said the engine runs but it runs poorly. Removing the water temperature sensor should make it so rich that it won't run at all. Different levels - runs well, runs poorly, doesn't run at all. You should at least hear a difference in the way it runs when you disconnect it. Which aftermarket pump? Some of them are high volume and might overpower the regulator. Did the problem occur immediately after changing fuel pumps? Basic troubleshooting rule is to undo what you just did if a problem appears. I found that any of the 1975 - 1978 ECU's would run my 76 engine.
  5. There have been discussions about what, exactly, goes bad in the ECU when they do go bad. The fact that disconnecting the water temperature switch has no effect suggests that that circuit is broken inside the ECU or at the ECU connection. You got the proper resistance measurement but the ECU did not respond when you disconnected it, suggesting that the ECU didn't "see" it. It should have had an immediate effect. If you can get it running, maybe try disconnecting the sensor at the engine while it's running to be sure there's no effect. If it works correctly it should go super-rich right aw
  6. You seem to be saying that the idle circuit is causing the ECU to provide too much fuel. That the switch tested correctly but when you disconnected it, disabling the idle enrichment, it ran better. Disconnecting the switch would be like opening the throttle, but without actually opening the throttle. It might be that something else is causing it to run rich and disconnecting the switch makes things better but is not the true cause. Running very rich is one of the signs of the ECU going bad. Sometimes people find that it's actually the connections at the plug. They tap or beat
  7. Not really clear what you did here. You said they come one when you give them power but you're asking about the ground side. Do they need power or do they need ground? Most headlight problems are at the dimmer switch as you mentioned. People have good luck by spraying contact cleaner down in to the dimmer mechanism and working the switch. Worth a shot.
  8. Did you check the throttle valve switch pins? There's a procedure. Sometimes they do get stuck on full throttle, they get dirty. That adds 27% extra fuel.
  9. Not clear who you're talking to. There are 16 pages in the thread. John Coffey died several years ago, but had already given the STI axle business over to Wolf Creek Racing before then. p.s. the R180 is not really strong enough for what you have. http://www.wolfcreekracing.com/index.php?option=com_content&view=article&id=22:tranny-a-rear-diff-parts&catid=16:tranny-a-rear-diff-parts&Itemid=31
  10. Looks like fun. "Value" for who or what? Is it an investment for resale or are you driving it?
  11. The two pronged sender on your 78 is a combined switch and sensor. Two devices in one. One prong is the switch for the relay and the other is the pressure sensor for the gauge. So you could use the sensor prong for the stick 78 gauge and leave the other disconnected. You don't need to buy a new sending unit. You might search the site and/or the internet for "ford inertia switch", it's a popular safety device around the modded car world. Although the Nissan design is better for mechanical malfunctions like if a fuel hose pops off and the engine stops running.
  12. If you disconnect the oil pressure switch on a 78 the fuel pump will run whenever the key is on.
  13. If the engine has been sitting it might be that the valve stems are gummed up or have surface rust. They stick, the cam lobe keeps going, and the rocker arm doesn't have any pressure on it to hold it in place. If it was mine I'd just keep the RPM down for a few hundred miles to let things wear back in. Although that's not what I did when I got my old had-been-sitting car. See if the wipe pattern looks the same after you reinstall them.
  14. Check the simple stuff like the air intake. Make sure the throttle blade is opening completely. Check the intake system for mouse nests, they work fast. Make sure the filter is not clogged. Take the black cover off of the AFM and make sure the counterweight/vane is moving freely as you rev the engine. The AFM vanes have been known to bind. The only thing stopping an in-tune engine from revving and producing more power is air flow. Your symptom sounds kind of like an air flow problem.
  15. I don't see spark plugs, distributor cap, rotor. Usually the first tune-up parts people think of. Here are some things to check that might offer a clue. Is the transmission shifting through the gears as you accelerate to 30 mph? What is the tachometer needle doing? Is it behaving normally, following engine RPM, or does it jump around? Do you think that the engine is running well, besides the lack of power? In other words, does it sound smooth or does it sound like it is missing or stumbling as you try to accelerate? Give more details on what, exactly, the engine
  16. #2 is low but it's within spec range, 10%. The engine should run fine just with maybe a lumpy idle due to the imbalance. You should definitely be able to go faster than 30 mph. The red on the camshaft is just factory paint, it has no meaning. Your rocker arm play is normal, the lobe was on the base circle (off the lobe), with no pressure on it. The others probably all do the same. Is it a manual or an automatic? When did you last give it a tuneup? Do you drive it often? Is it possible that there is water in the fuel tank, from sitting long periods between driving?
  17. You said you wanted it to rev higher. Where is your cam timing? Did you degree the cam to Schneider specs when you installed it? You can move the powerband higher by changing cam timing. Cam timing affects "breathing". https://help.summitracing.com/app/answers/detail/a_id/4706/~/advancing-%2F-retarding-a-camshaft#:~:text=A Basic Overview of Cam,the camshaft and the crankshaft.&text=Advancing or retarding the cam,other of the crankshaft centerline. https://www.jcmmachineandcoatings.com/understanding-combustion/degreeing-a-camshaft/#:~:text=Degreeing the Camshaft-
  18. Cam timing generally determines where the torque power curve is, high or low on the RPM range. Did you do all of this work yourself or have some help? There's some odd things in the overall story. No offense.
  19. Gorilla has good stuff on their site and seems to make a good product. You can find them in the auto parts stores, on the shelf. Read this page and you'll see that hole size is not the issue. Yours have a specific seat style. Wheels either locate through the seat, or by the shank. Shanks require a precision hole. The others require a precision seat. https://www.gorilla-auto.com/gorilla-tech-tips
  20. That assembly seems to be meant for permanence. It's not really meant to be unplugged. People that have had success have had to devise small picks and thin blades to get past the locking mechanism. In other words, you'll need to do your best Macgyver. Here's an old post about it, if this is the one you're talking about. Read this one and a couple more below it. https://www.classiczcars.com/forums/topic/60007-78-280-re-assembly/?do=findComment&comment=549453
  21. I did a Google and found this. I'd wait and confirm. One's from Hybridz. Not looking good. https://zilvia.net/f/showthread.php?t=50158 https://www.google.com/search?rlz=1C1SQJL_enUS862US862&sxsrf=ALeKk012kyI3OARbRxjn53vqXgsMBXC7CQ%3A1605209360066&ei=EI2tX8fJA9ba-gTFpY7gCQ&q=S15+Helical+LSD+spline+shaft&oq=S15+Helical+LSD+spline+shaft&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAEyBQghEKsCMgUIIRCrAjoECAAQRzoHCCMQrgIQJzoICCEQFhAdEB46BwghEAoQoAFQhT1Y4FFgoVNoAHACeACAAWyIAe4IkgEEMTEuMpgBAKABAaoBB2d3cy13aXrIAQbAAQE&sclient=psy-ab&ved=0ahUKEwjHkcn
  22. I think that the exhaust manifold with the turbo flange, and the J pipe to take the pressure to the manifold are the two items that are specific to the L28. The rest can probably be pieced together on the aftermarket. That's for EFI. Good stuff here: https://forums.hybridz.org/forum/90-l-series/ You can buy kits: https://www.cxracing.com/turbo-kit-nissan-datsun-240z-260z-280z-s30/turbo-kit-nissan-datsun-240z-260z-280z-s30-l28-l28E/TRB-KIT-IM-L28-280Z-NOIC Search words: https://www.google.com/search?q=datsun+turbo+kits&rlz=1C1SQJL_enUS862US862&oq=d
  23. 77 and 78 have a very different style window and door. Might be that zcardepot just assumed they were all the same. What is that actually stops the window, at the bottom of its travel, on your car? That might be the clue.
  24. Anything from 77 to 83 ZX will swap right in as far as 5 speed. If you get a mid-80 to 83 5 speed you'll probably want the 3.9 diff also. And a 76-78 propeller shaft. Your 75 should have the unique bolt pattern diff flange and propeller shaft. Any engine up to 1983 will swap in . I had good luck just buying a whole car that had been sitting for years. If you have the space you can save a lot of money that way.
  25. This might be simpler and faster than a crank-mounted wheel. Several good articles on the web site also. https://www.diyautotune.com/product/54-mm-optical-trigger-wheel-for-nissan-l28et-or-vg30e/ https://www.diyautotune.com/support/tech/hardware/nissan-trigger-disc/ https://www.diyautotune.com/support/
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