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Old 11-02-2001, 10:28 AM   #2
Chevyguy
Backyard Mechanic/Chemist
 
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Join Date: Feb 2001
Location: Acton MA USA
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Easy, the EEC IV system came out in 84 and was used till 95 in all Mustangs, so you have a EEC system if the engine is stock.

FYI the difference from Duraspark to EEC is that the EEC has no mechanical or vaccum advance provisions, hence the rotor is fixed on the distributor shaft. Also the presence of the imfamous TFI module on the side of the distributor signals a EEC system.

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