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I have an 02 elantra, and I noticed whenever I'm driving that the tachometer does not respond to the gas pedal. It starts to work right when I turn on the car but, then when I start to drive it, it stops working then jumps to 0, and then when I'm driving on the highway it jumps everywhere, theres no clean response. and it gets kind of annoying. I know that it runs off the pulses from the coil pack, but I'm not sure if it's something else. it's could either be the coil pack, or the tachometer it self is bad. PLEASE HELP!!!
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