It was designed to run on 4 cylinders at highway speeds; it would gradually go from 8 to 6 to 4. However the system was problematic and many owners simply disconnected it.
www.mcsmk8.com/8-6-4/8-6-4.HTM
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www.howstuffworks.com/1980-1989-cadillac2.htm
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24th Sep 2016, 17:08
It was designed to run on 4 cylinders at highway speeds; it would gradually go from 8 to 6 to 4. However the system was problematic and many owners simply disconnected it.