Question on Hypertech Tuning Module
#1
Question on Hypertech Tuning Module
A year or so ago, prior to getting interested in self tuning I purchased a Hypertech tuning module (pigtail) attached to my PCM (1994 Z28 has flash , not chip). This may be a silly question, but how does this module actually work. I can read the PCM using TunerCat with and w/o the Hypertech installed and the tables are the same. I always disconnect it prior to writing to flash to alter fan, speedo or shift points. I will eventually have to take it off completely as I get into timing and fuel ration changes. However I am very curious on how this thing actually works, does it use the same table information but alter how the PCM manages timing and fuel ratios with variables or tables I can't see ??
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