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When I purchase my 240 about a year ago, the previous owner gave me a big box of extra parts. Included in the box was 2 clocks, 3 Amp/Fuel, and 3 Temp/Oil. It looks like there are a few from a 72' 240z and some from a 74' 260z. See picture. I was looking for some assistance on what to do with them. The previous owner didn't think that they were working, but based on his overall lack of knowledge for the car, I think i'd like to test that theory for myself. Can someone give me some insight on how to go about testing these? Secondly, what does demand look like for selling these? I see some on ebay ranging from $30 to $100, depending on the gauge and condition. If they aren't working, is it worth it to spend the money to fix them, then sell them? I'm not overly concerned with getting top dollar for them, they will likely just go back into the box if they aren't worth the time. Summary 1. How do I test them? 2. Are any of them worth anything? 3. If they aren't working, is it worth it to have them repaired/refurbished? Thank you!

so i purchased a 77 z in january and have been just lightly working with the car trying to fix the years of neglect and trying determine if the problems im facing could be related or if i just have a few multiple. also ive been sifting through the posts on here and cant seem to find answers to what im trying to fix. so im posting a new thread. so to start off this car sat for at least 3 years, runs and drives as well. however running is running but not running well. the car has a poor idle and has quite a bit of hesitation. until reaching about 2500 rpm. and also backfires. exhaust and intake. when the water temp sensor is unplugged it runs a lot better with little to no back firing. but does have an even worse idle. but has no hesitation when the throttle is pressed. ive been looking into it and thought maybe its the afm. however it seems to be working properly and i also figured the water temp sensor wouldnt effect the afm that much so ive begun to stray away from the afm as a likely culprit. also noticed that the spark plugs are all black which i have cleaned a few times since i purchased. which leads me to believe that its running rich. this is something that im wondering is related somehow. none of the gauges aside from the speedo tach and voltage work. all read 0. i have replaced the sending unit for the temp. and have checked the connections and all seem to be fine. checked all fuses and none are faulty. figured before i just started dumping money i would ask and see if anyone has an answer to my problems or problem. thanks!

OK my tach,fuel gauge,temp and oil preasure as well as the choke light have stopped working a few times in the last couple days. Then they just start working again, wow its the magic Z. In any case this magic is not quite as entertaining as it is a pain in the butt. Any ideas what it could be, the car is a 1974 260z. Thanks Glenn

I recently replaced the radiator and added an overflow bottle in my '75 280z. After refilling the system with coolant, I took her for a test run to check for any leaks. The temp gauge was reading good - about 5/8ths...then the gauge dropped to the bottom of its range. I checked the connection on the temp sender and topped off the coolant and took her for another spin. Again the gauge was reading good then stopped working again. I let the system cool again and took off the radiator cap to add more coolant, but the coolant was at the top of the radiator. Would an air bubble in the thermostat housing cause the temp gauge to not register?