Keep in mind those numbers seem high due to atmospheric pressure not being accounted for. 14.7 psi at sea level IIRC. Take 14.7 away from that and your numbers are more normal sounding.
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This is the ground I'm talking about. It's directly in front of the battery box on the drivers side. That bolt was loose and when I tightened it up my speedo issues went away.
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Check behind the drivers side headlight. There's a ground bolted to the core support that likes to work its way loose occasionally. Gave me fits when the speedo was acting up on my 03.
I don't think the tach moves when cranking on any 02 (or 03 for that matter). Has something to do with the instrument cluster ford changed to.
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