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Love the photo of the Cherokee with smoking REAR ONLY tires. Must have the older Select Trac system 'eh? :D

I'm guessing it's a ''piggy back'' type plug in module. They plug inline to the ECM's sensor data wiring, and send false signals to the ECM to keep it ''happy'' by thinking it has normal parameters coming in.

That type of module has been around for a while, and even work on diesel engines. The cheap price sounds almost too good to be true, but then again, there ain't but $10 worth of parts even in a Hyperchips programmer. :D
 
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