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Old 08-26-2009, 12:41 PM   #8
Duct_Taper's Avatar
Join Date: Oct 2008
Location: Ottawa
Posts: 601
If you swapped from a 6-cyl to a V8 and didn't do anything to the tach then it's entirely possible that it's way off. Pretty sure you need to get a coding plug for a 4-cyl and rig up some sort of resistor setup to make it read right.
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