Question about 2003 Ford Focus
Wild revving can be a sign of a bad idle control valve, clogged fuel or air filter, fouled plugs, or bad fuel sending unit.
There are no sensors on any of these things and the ecu isn't smart enough to trouble code them.
Start with the cheap stuff and work your way up the money ladder.
Posted on May 30, 2009
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Posted on Jan 02, 2017
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