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Factory tach reads wrong


jcd302

jcd302

New Member
Supporting Member
U.S. Military - Veteran
Joined
Jan 11, 2011
Messages
724
Reaction score
29
Points
0
Location
Clarksville, MI
Vehicle Year
2007
Make / Model
Ford
Engine Size
4.0L
Transmission
Automatic
Just picked up this 89 (2.9L 4wd). Going let's say 55 it says 3000 rpm. At idle it says 1200 but is is obvious it is not ideling that high.
Any thoughts?
 
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