Hello group, MY tach will twitch and jump around , bearing no affect on the engine. Will even do it with IGN on and car not running. Sometimes will jump a little or bounce around like crazy any ideas?
Thanks, Justin
Could be the tach itself. You need to disconnect the input to the tach. Allow the tach to still be DC powered. Does it still have the problem. If it's still doing it... the tach is goofed up. If the problem stopped... you probably have a poor connection somewhere on the input wire.
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