Question about 1987 Toyota 4Runner
There are 2 things that cause the tach to do this, one is the tach itself has a problem or a connection to it, the other is a leaky plug wire, it sends out radio noise, the tach picks it up and the needle spikes up and down, saw it more than once, sold a customer a tach and it was a bad plug wire.
Posted on Dec 07, 2008
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Posted on Jan 02, 2017
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