mario_82_ZXT Posted September 13, 2007 Share Posted September 13, 2007 This has happened on 2 280z installs, one a 76 and the other an early 77. The tach only works over ~2000 rpms. It goes dead when you go below that and then jumps back above that, and is steady to redline. I never had this problem in 2 280zx's and one 78 280z. The ballast resistor was removed in these earlier cars but the tack resistor wasn't (at least according to the wiring diagram it wasn't). Ideas? Mario Quote Link to comment Share on other sites More sharing options...
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