unplugged

[jim49]

After a trip to a local dealer in AL and a $2500 bill, mileage started dropping from 6.7. Trip to NM ended at 5.3 mpg and engine dash lights are on. Remembered reading about the magic plug, so I unplugged it and drove it back from NM to home in GA. All lights went out except for engine check light and mileage went to 8.3. Question is how long can I run it with the magic plug out? Also, I have purchased an inline six adapter and need help badly. Can and will do all labor myself.