What would cause the tach to go to zero with the engine still running then go all the way up and down. It's not in tune with the actual rpm of the engine. Is this a expensive problem?
96 cobra tach going crazy
Jan 18, 2007
1 Replies
It is probably a loose wire on the distributor pickup. I am not totally familiar with the mustang tach system but had a similar problem with a Fiero. the wire was actually burned through and would short out.
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