auxilary Posted May 29, 2001 Share Posted May 29, 2001 Hey guys, I have a '73 240z, with a factory tach. When I turn over the ignition key to acc without starting the car, the needle will jump to 2-3k rpm. When the engine idles, it'll vary between 3-5k rpm (which is obviously false, it just shows 2-3k rpm more than the actual reading). Any ideas on what's going on? Quote Link to comment Share on other sites More sharing options...
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