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Showing results for tags 'rpm'.
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Hi all, Could you please help me with fixing my tachometer issue? I have 240z 1973 us version. The tachometer seams working on the first look properly. But it doesn't because it displays only +- half of real rpm. Tachometer can't go over 3000 rpm but the real rpm is on limit. I checked the coil and resistor and boths are ok. I have red coil 1.5ohm and the resistor is 1.8ohm. Thank you for any suggestions how to fix this issue. Thanks a lot. Kind regards, Radim
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Greetings all I have a stock 75 280z. Electronic ignition. When I try to use my digital multimeter (set to 6 cylinder) to set my rpm. After I connect ONE meter wire to the coil I get a rpm reading but as soon as I hook the other to a ground, the meter zeros out. If I hold it close to coil I get a reading, but as soon as it touches metal it goes to zero.Reading varies by how close I hold meter ground wire to coil or metal. Doesn't seem to make a difference on what meter wire configuration I use. Been fixing cars for 40 years never ran across this before, searched google, searched here and other z sites. Must not be using right search phrase. I'm stumped! any ideas why it's doing that? Sorry if I am not clear enough, or you need more info just ask. thanks for taking the time to read this. PS tried it with analog meter same results Rich
